Entries |
Document | Title | Date |
20080198906 | APPARATUS AND METHOD FOR INCREASING CELL CAPACITY THROUGH OPTIONAL SIGNAL COMBINING BETWEEN RELAY STATIONS IN A CELLULAR SYSTEM USING WIRED RELAY STATIONS - A method, apparatus and system for increasing cell capacity through optional signal combining between Relay Stations (RSs) in a cellular system using wired RSs is disclosed. The method includes receiving, by a Base Station (BS), an average Carrier-to-Interference ratio (C/I) value of transmission signals from Mobile Stations (MSs) located inside each coverage area, being fed back from the RSs or the MSs in its corresponding cell; classifying the MSs into two groups according to the C/I value; performing resource allocation satisfying a minimum data rate from a corresponding RS, for MSs belonging to a group having a C/I value greater than a preset threshold Γ among the classified groups; performing resource allocation by applying an optional signal combining scheme taking into account two RSs having a highest C/I value, for MSs belonging to a group having a C/I value below the threshold among the classified groups; and allocating all unallocated subchannels of each individual RS in an order of an MS having a high C/I value among MSs of a corresponding RS until there is no more unallocated subchannel of each RS. | 08-21-2008 |
20080232442 | Method of transmitting data in a communication system - A method of processing a signal received at a node in a network, comprising the steps of; receiving the signal at the node; determining characteristics of a first part of the signal; determining characteristics of a second part of the signal that is subsequent to the first part of the signal; quantifying an effect on the signal caused by applying an action to the first part of the signal, based on characteristics of the first part of the signal; quantifying an effect on the signal caused by not applying the action on the first part of the signal, based on characteristics of the second part of the signal; applying the action to the first part of the signal if it is determined that the effect on the signal caused by applying the action to the first part of the signal is less detrimental to at least one measure of the signal quality than the effect on the signal caused by not applying the action to the first part of the signal. | 09-25-2008 |
20080240208 | Adaptive Switching Techniques for Hybrid Automatic Repeat Request Systems - Apparatus, system, and method for an adaptive transmission selection technique. A retransmission scheme is selected for a multiple-input-multiple-output (MIMO) wireless communications system. Techniques are provided herein for selecting from a plurality of wireless communication techniques when a first device needs to retransmit a signal (one or more packets of data) to a second device. The first device determines when the signal which was originally wirelessly transmitted using beamforming techniques via multiple antennas of the first device to the second device needs to be retransmitted to the second device. If a retransmission is needed, the first device determines channel conditions with respect to the second device. The first device selects a retransmission scheme from a plurality of transmission schemes based on the channel conditions for retransmitting the signal via the multiple antennas of the first device to the second device. A first retransmission technique is selected when the channel conditions are static. A second retransmission technique is selected when the channel conditions are relatively slowly changing, and a third retransmission technique is selected when the channel conditions are relatively quickly changing. | 10-02-2008 |
20080267266 | Pre-Equalization Apparatus and Method for Reducing Time Delay in On-Channel Repeater - Provided is a pre-equalization apparatus and method that can reduce time delay of an on-channel repeater. The pre-equalization apparatus reduces time delay in an on-channel repeater by generating modified filter coefficient from a given filter coefficient and a pre-equalization filter coefficient after an up-sampling process and filtering up-sampled signals. The pre-equalization apparatus includes: a baseband signal generating unit for forming a baseband signal by combining an inputted signal, field sync signal, and segment sync signal; a pilot adding unit for adding a pilot signal to the baseband signal; an up-sampling unit for up-sampling the baseband signal having the pilot signal; a pre-equalization filter coefficient generating unit for generating a pre-equalization filter coefficient; a modified filter coefficient generating unit for generating a modified filter coefficient by using the pre-equalization filter coefficient and a given filter coefficient; and a filtering unit for filtering the up-sampled signal by using the modified filter coefficient. | 10-30-2008 |
20080304555 | Method and Arrangement for Improved Relaying - A first aspect of the present invention relates to a wireless relaying network having a number of network nodes, including a transmitting node, at least one relaying node and at least one receiving node. Briefly, according to the present invention the transmitting node forms an OFDM-symbol and transmits a signal comprising the OFDM-symbol to the at least one relay node and directly to the receiving node. The relaying node receives, amplifies and transmits the symbol to the receiving node in such manner as to enable the relayed signal and the direct signal to be receive concurrently at the at least one receiving node to enable constructive interference of the OFDM symbol. | 12-11-2008 |
20080317104 | Linear transformation matrices for distributed diversity - A signal for relay is received from a first node. From a local memory that stores K transform matrices (K being an integer greater than one) is selected a transform matrix that is associated with a relay rank order. The matrices define an optimal tradeoff of diversity gain versus spatial multiplexing. The received signal is transformed using the selected transform matrix, and the transformed signal is relayed over a wireless channel to a second node. In a particular embodiment the received signal is an input symbol vector of N consecutive symbols (N being an integer at least equal to two) and the transform linearly combines the N symbols of the input vector according to the relay rank order. In various embodiments the first node may give the rank order, it may be mutually agreed via signaling among the various relay nodes, or it may be based on an intrinsically generated random number. | 12-25-2008 |
20090003417 | Interface Circuit for Transmission of Digital Signals - The transmission branch of an interface circuit has a transformer. On the input side there are applied to the transformer, for example from a controller, high-frequency impulses. The output side of the transformer controls a switch, such as for example a power transistor, which modulates the desired digital signals onto a connected bus line. | 01-01-2009 |
20090041097 | APPARATUS AND METHOD FOR NETWORK-CODING - Provided are a network-coding apparatus and method which can increase a data communication capacity in a communication environment to which an error-correction code (ECC) is applied. The network-coding apparatus includes a received signal processing unit receiving at least two signals, and decoding the at least two received signals; and a transmission signal processing unit receiving the at least two decoded signals from the received signal processing unit, merging the at least two decoded signals, and generating a merged transmission signal. | 02-12-2009 |
20090046767 | Method and Apparatus for Communication Handoff - Seamless communication handoff is achieved by establishing a protocol tunnel to route leftover packets between network access nodes during the handoff. For example, in a mobile IP-based system, a mobile node may perform a handoff from a first access node that is associated with a first routing node to a second access node that is associated with a second routing node. To prevent the loss of any packets that may be in route for delivery to or from the first routing node during the handoff, the mobile node establishes a protocol tunnel with the first access node via the second access node. On the forward-link, packets being delivered from the first routing node are routed over the protocol tunnel to the second access node and then to the mobile node. On the reverse-link, packets being sent to the first routing node are routed over the protocol tunnel from the mobile node to the second access node and then to the first routing node. In conjunction with these operations, the mobile node concurrently maintains separate IP interfaces for the routing nodes. In addition, steps are taken to ensure that packets are routed to the appropriate IP interface during the handoff. | 02-19-2009 |
20090052507 | System and Method for Closed-loop Signal Distortion - The system and method disclosed herein provide for closed-loop compensation of significant amplitude versus frequency group delay distortion that may be introduced into a satellite communication system signal by the uplink equipment and a satellite repeater equipment. One or more equalizers can be configured to automatically assess distortion at the downlink receiver, automatically calculate the necessary pre-distortion coefficients and provide them to a modulator that pre-distorts the uplink signal to thereby cancel the distortion. | 02-26-2009 |
20090060009 | AGGREGATE DATA FRAME GENERATION - In an example embodiment, an aggregate frame, such as a A-MSDU aggregate is generated from interleaved frames addressed to various receiver addresses. The incoming frames are regrouped by receiver address. The aggregate frame is generated from the regrouped frames. | 03-05-2009 |
20090060010 | DIFFERENTIAL CHANNEL QUALITY REPORTING - Various example embodiments are disclosed herein. According to one example embodiment, a method may include obtaining a first channel quality measurement for a wireless node such as a mobile station or relay station in a wireless network. The method may further include sending, from the wireless node, a full channel quality indicator (CQI) to a base station based on the first channel quality measurement. The method may further include obtaining a second channel quality measurement for the wireless node. The method may further include sending a differential CQI to the base station based on comparing the second channel quality measurement to the first channel quality measurement. The differential CQI may occupy less channel resources than the full CQI. | 03-05-2009 |
20090080501 | MOBILE COMMUNICATION SYSTEMS AND RANGING METHODS THEREOF - A mobile communication system, including: first and second nodes, wherein the first node includes: a first transmitter and a first receiver, and wherein the second node includes: a second receiver receiving a ranging signal from the first transmitter; a frequency synthesizer generating an internal signal in response to a sensing of the reception of the ranging signal; a digital circuit calculating a beat frequency by comparing the ranging signal to the internal signal and evaluating a time lapse from the reception of the ranging signal until the sensing of the reception of the ranging signal by using the beat frequency, wherein the time lapse is part of a response time of the second node; and a second transmitter providing the first receiver with the ranging signal that includes the response time of the second node. | 03-26-2009 |
20090086793 | REPEATER CIRCUIT - A repeater circuit configured to duplicate or otherwise coordinate signal transitions between state conductors, such as for use in asynchronous communication systems. The repeater circuit may include a state node or other feature to facilitate enforcing or otherwise ordering transitioning of the state conductors. | 04-02-2009 |
20090092176 | REGENERATOR UNIT - A communication system comprises a central unit configured to transmit and receive communication signals; a remote unit configured to transmit and receive communication signals; and a regenerator unit configured to regenerate and transmit received communication signals, the regenerator unit comprising a first interface, a second interface and a control and status circuit configured to control operation of the first and second interface, wherein each interface is configured to operate as an independent logical regenerator unit; wherein the central unit and the remote unit communicate over a first communication loop via the first independent interface of the regenerator unit. | 04-09-2009 |
20090110038 | ARRANGEMENT AND METHOD FOR TRANSMITTING CONTROL INFORMATION IN WIRELESS COMMUNICATION SYSTEMS - Systems and methodologies are described that facilitate arrangement and transmission of control information in a wireless communication system. As described herein, a scheduled transmission of acknowledgement (ACK) signaling and channel quality information (CQI) signaling in a common subframe can be adapted for network implementations with limited link budget wherein ACK signaling is configured for repetition over multiple subframes to ensure a desired error rate level for the ACK signaling. To these ends, various aspects described herein facilitate modification of a coding rate applied to ACK signaling to be transmitted with data based on a repetition factor of the ACK signaling. Additionally and/or alternatively, various aspects described herein facilitate dropping of CQI signaling and transmission of only ACK signaling on subframes where CQI and ACK signaling are to be transmitted substantially simultaneously and ACK transmission is configured for repetition over multiple subframes. | 04-30-2009 |
20090122842 | High frequency signal hub - The present invention concerns a system for high frequency signal transmission in power line networks and also concerns signal hubs and repeaters to be used in such systems. The primary aim of the invention is to provide a communication system of a general type wherein the isolation between high frequency input and output signals is maintained. The hubs and repeaters are designed to be easily installed in the network. Radio and wireless links at subscriber nodes are also parts of the system. | 05-14-2009 |
20090122843 | RERADIATION APPARATUS FOR TERRESTRIAL DIGITAL BROADCASTING AND METHOD FOR RERADIATING TERRESTRIAL DIGITAL BROADCASTING - A reradiation apparatus for terrestrial digital broadcasting which can continue to reradiate a broadcasting signal even if the receive state of the broadcasting signal deteriorates intermittently with movement is provided. The reradiation apparatus for the terrestrial digital broadcasting includes plural antennas which are provided in mutually spaced along the running direction of a mobile, plural receiving processing parts provided corresponding to each antenna, a master selecting part which chooses any one of the receiving processing parts as a master, a monitoring part which supervises receive states of the terrestrial digital broadcasting signals of the plural receiving processing parts, a switching part, and a reradiation unit. The switching part chooses the terrestrial digital broadcasting signal received by the receiving processing part selected as a master or the terrestrial digital broadcasting signal received by other receiving processing part based on the receive state of the receiving processing part chosen as the master, and the reradiation unit reradiates the selected terrestrial digital broadcasting signal in the mobile. | 05-14-2009 |
20090141780 | DOWN-CONVERTER AND UP-CONVERTER FOR TIME-ENCODED SIGNALS - The disclosed invention provides apparatus and methods that can convert frequencies of time-encoded signals. In one aspect, a down-converter circuit includes low-pass filters, a switch, a time encoder, and an output low-pass filter. In another aspect, an up-converter circuit includes an analog or digital input time encoder, low-pass filters, a switch, an output time encoder, and a time-encoded band-pass filter. In yet another aspect, a complete receiver system is provided. The receiver system can operate effectively with signals in the radio frequency range. | 06-04-2009 |
20090154533 | SYSTEM AND METHOD FOR TRANSMIT TIME COMPUTATION AT A RELAY STATION - Communications between a base station and a mobile station is improved through using a relay station. A transmit timing of relayed signals from the relay station is controlled so that the signals from the base station and the relay station arrive to the mobile station aligned with each other within a predetermined tolerance. | 06-18-2009 |
20090190634 | Method , apparatus and system for channel estimation in two-way relaying networks - An apparatus for estimating a wireless radio channel between a first terminal and a relay station, the apparatus including a receiver for receiving a signal including a superposition of previously transmitted first information from the first terminal and second information from a second terminal, the second terminal also communicating with the relay station, a storage for storing the previously transmitted first information, and a channel calculator for calculating the wireless radio channel using the received signal and the stored first information as pilot information for the received signal. | 07-30-2009 |
20090252203 | WIRELESS COMMUNICATIONS NETWORK COMPRISING MULTI-HOP RELAY STATIONS - A method is provided for conveying wireless communications in a radio network using OFDMA or multi-carrier technologies. The wireless network comprises a first relay station and a subscriber station that is operative to communicate with that first relay station. The first relay station is operative to simultaneously transmit to or receive communications from at least two recipients along a shared frequency channel. The two recipients are wireless network entities selected from among: the base station and a subscriber station; or another relay station and a subscriber station; or the base station and another relay station. According to an embodiment of the invention the wireless communications network further comprises a second relay station, which is operative to simultaneously transmit to or receive communications from at least two recipients along a shared frequency channel. The two recipients are wireless network entities selected from among: the first relay station and a subscriber stations, or a third relay station and a subscriber station, or the first relay station and a third relay station, wherein a third relay station is a relay station that does not exchange communications directly with either the base station nor the first relay station. | 10-08-2009 |
20090257480 | System and method for utilizing spectral resources in wireless communications - A wireless communication system comprises a wavelet analyzer and a wavelet signal generator. The wavelet analyzer is operable to analyze wireless signals within a frequency and time map of a communications spectrum, whereby the wavelet analyzer is adapted to determine one or more available cells within the frequency and time map. The wavelet signal generator is operable to generate one or more wavelet signals for transmission within the determined one or more available cells of the frequency and time map based on the analyzed wireless signals within the frequency and time map. | 10-15-2009 |
20090268790 | Methods and apparatus for network coding in a communication system - A system and method for relaying communications in a wireless communication network. A relay station capable of relaying wireless communications includes a plurality of receiver antennas and a plurality of transmitter antennas. The plurality of receiver antennas is operable to receive, in a first time interval, a first communication from a base station and a second communication from a subscriber station. The plurality of transmitter antennas is operable transmit a third communication to the base station and the subscriber station in a second time interval. The relay station also includes a network encoder. The network encoder is configured to generate a combined symbol constellation. The combined symbol constellation is generated by combining a first symbol constellation transmitted in said first communication with a second symbol constellation transmitted in said second communication. Further, the third communication comprises said combined symbol constellation. | 10-29-2009 |
20090279593 | Method And System For Inter-PCB Communication Utilizing A Spatial Multi-Link Repeater - Aspects of a method and system for inter-PCB communication utilizing a spatial multi-link repeater are provided. In this regard, a signal may be transmitted between printed circuit boards via one or more repeaters, wherein the repeaters may frequency shift received signals to generate repeated signals. Each of the repeated signals may be generated by quadrature down-converting said received signal by mixing the received signal with a first LO signal pair, up-converting the down-converted signal by mixing it with a second LO signal pair, and adding or subtracting an in-phase portion and a quadrature-phase portion of the up-converted signal. Each repeated signal may comprise one or more signal components and a phase and/or amplitude of each of the components may be controlled to control a directivity of the repeated signals. The repeater may reside on one of the plurality of printed circuit boards. | 11-12-2009 |
20090304052 | SYSTEM AND METHOD FOR MAKING BUSSES LIMITED TO A LINEAR TOPOLOGY EXTENSIBLE TO OTHER TOPOLOGIES - A communication system and method includes a main bus that operates in accordance with a standard limited to a linear topology, a bus controller coupled to the main bus and configured to send and receive messages on the main bus, and a first remote terminal coupled to the main bus and configured to send and receive messages on the main bus including the messages sent by the bus controller. The system and method also includes a repeater coupled to the main bus and configured to send and receive messages on the main bus including the messages sent by the bus controller and by the first remote terminal, and second and third remote terminals coupled to the repeater, wherein the second and third remote terminals send and receive messages on the main bus via the repeater. | 12-10-2009 |
20090316763 | SPATIAL MULTIPLEXING GAIN FOR A DISTRIBUTED COOPERATIVE COMMUNICATIONS SYSTEM USING RANDOMIZED CODING - Multiple cooperative relays operate in a highly mobile environment and form a virtual antenna array. Multiple independent streams of data can be simultaneously transmitted in parallel to the destination receiver. Thus a higher spatial multiplexing gain can be obtained. Such exemplary embodiments might do so by allowing each relay to transmit a linear combination of antenna waveforms according to an independently and randomly generated coefficient vector. This randomized cooperation scheme may be useful in an environment in which a group of relay devices are close to the source device, and can therefore receive information at a high rate. Each relay device that receives the information without errors splits it into multiple streams. For example, if the relay devices receive B symbols and the number of streams is K, each stream contains B/K symbols. Each relay device then generates a random linear combination of all the streams and transmits this output simultaneously with the other relay devices. | 12-24-2009 |
20100046590 | EXTENDING TRANSMISSION DISTANCE IN A HIGH-SPEED SERIAL NETWORK - A data transmission system for transmitting data from a first location to a second location includes a transmitting device configured to transmit the data and located at the first location. The transmitting device includes a serial attached SCSI (SAS) enabled controller. The system also includes an I/O port coupled to the transmitting device and having multiple lanes and a repeater powered by one of the lanes. The system also includes a receiving device coupled to the second end of the cable. | 02-25-2010 |
20100080269 | METHOD OF TRANSMITTING REFERENCE SIGNALS FOR COOPERATIVE WIRELESS COMMUNICATION SYSTEM AND METHOD OF ALLOCATING RADIO RESOURCES FOR RELAY-BASED WIRELESS COMMUNICATION SYSTEM - A method of transmitting reference signals in a wireless communication system for cooperative communication is provided. The wireless communication system defines a plurality of transmission patterns of the reference signals each having a different pattern, and each of a plurality of base stations and/or each of a base station and a relay station participating in the cooperative communication transmit the reference signals based on one transmission pattern selected from the plurality of transmission patterns of the reference signals. | 04-01-2010 |
20100091823 | Two-hop Relay for Reducing Distance Vector Routing Information - In one embodiment, a method for using a two-hop relay includes receiving an update message for a distance vector routing protocol from a first neighbor. The update message is sent to a different neighbor. Often, it is first determined whether the receiving node is a relay node for the first neighbor in the protocol. The relay node is a node preferred to update a particular node two hops from the first neighbor. In another embodiment, a method for serving as the two-hop relay includes receiving from each neighbor a first message that includes neighbor data that indicates nodes that are in direct communication with the neighbor. A relay set of fewer than all neighbors is determined. Every node two hops from the first node is updated using only the relay set of neighbors. The relay set is sent in a second message for the protocol. | 04-15-2010 |
20100103990 | SYNCHRONIZATION METHODS FOR SINGLE-FREQUENCY SIMULCAST MOBILE RADIO COMMUNICATION NETWORKS - What is described is a circuit arrangement and a method for synchronizing the communication signals between a repeater station (S) of a single-frequency simulcast radio communication network (N) and user terminals (T) with respect to a universal reference signal sent by a central station (M) of the network (N) communicating with the repeater station (S). A frequency offset is determined between a universal frequency reference signal received from the central station (M) and a local frequency reference signal of the repeater station (S), and in the repeater station (S) there are provided a first feedback control loop for supplying a signal for controlling a local oscillator of the repeater station (S) on the basis of the said determined frequency offset, and a second direct control loop for supplying a signal for compensating the residual synchronization difference of the local oscillator ( | 04-29-2010 |
20100103991 | Communication Systems - A transmission method for use in a multi-hop wireless communication system is provided. Furthermore, the system has access to a time-frequency format for use in assigning available transmission frequency bandwidth during a discrete transmission interval. The format defines a plurality of transmission windows within such an interval, where each window occupies a different part of that interval and has a frequency bandwidth profile within the available transmission frequency bandwidth over its part of that interval. Furthermore, each window being assignable for such a transmission interval to one of said apparatuses for use in transmission. The transmission method for use in this system includes employing said format for one or more such transmission intervals to transmit data and control information together along at least two consecutive said links as a set of successive transmission signals, link by link. Each said signal is transmitted in an available transmission window of said interval(s) and at least two of said signals are transmitted during the same said transmission interval such that said information is transmitted along said consecutive links in fewer transmission intervals than said number of consecutive links. | 04-29-2010 |
20100177807 | METHOD AND APPARATUS FOR RELAYING WIRELESS TRAFFIC IN A WIRELESS NETWORK - A relay station to relay wireless traffic between a base station and mobile stations. The relay station receives incoming subframes of OFDM symbols and transmits outgoing subframes of OFDM symbols. The relay station comprises a timing offset controller configured to control the transmission of a first outgoing subframe with respect to reception of a first incoming subframe, such that the first outgoing subframe either leads or lags the reception of the first incoming subframe by a first time offset. The first time offset is equal to at least one OFDM symbol. | 07-15-2010 |
20100202497 | APPARATUS AND METHOD FOR COOPERATIVE RELAYING BASED ON BEAMFORMING IN A MOBILE COMMUNICATION SYSTEM - A method and apparatus for cooperative relaying based on beamforming in a mobile communication system. In a method of cooperative relaying based on beamforming in a mobile communication system, a signal received from a transmitting terminal is decoded by a relay station to determine whether a decoding error occurs. The relay station then acquires a beamforming weight corresponding to decoding error information, if the decoding error occurs. The relay station then applies the beamforming weight to the signal received from the transmitting terminal, and transmits the signal. | 08-12-2010 |
20100220769 | CONTENT REPRODUCTION APPARATUS, CONTENT RECEIVING APPARATUS, METHOD OF REPRODUCING CONTENT, PROGRAM, AND CONTENT REPRODUCTION SYSTEM - There is provided a content reproduction apparatus including a reproduction request receiving unit that receives from a first external device conforming to a first communication standard a request to reproduce content data selected by the first external device, a content data obtaining unit that obtains from a second external device conforming to the first communication standard, which stores the content data selected by the first external device, the content data in response to the received request, a content reproduction unit that reproduces the obtained content data, and a data converting unit that converts data which can be transmitted according to the first communication standard into data which can be transmitted according to a second communication standard different than the first communication standard. | 09-02-2010 |
20100238982 | RELAY APPARATUS - A relay apparatus, comprises a reception section that receives real-time data, a monitoring section that periodically detects quality of a transmission path to be used for transmitting the real-time data toward a destination thereof, a determination section that determines a length of an interleaving cycle according to the quality of the transmission path, an interleaving section that interleaves the real-time data in the interleaving cycle having the determined length, and a transmission section that transmits the interleaved real-time data to the transmission path. | 09-23-2010 |
20100265996 | REPEATER AND METHOD FOR PROCESSING SIGNAL, AND METHOD FOR CONVERTING SYNCHRONOUS FREQUENCY THEREOF - A repeater having different input and output frequencies converts a signal received with the input frequency to a first intermediate frequency signal based on a local oscillating frequency for intermediate frequency conversion, and converts the first intermediate frequency signal to a second intermediate frequency signal by performing digital processing on the first intermediate frequency signal. Then, the repeater generates a first frequency tone signal that corresponds to a difference between the input and output frequencies, and generates a second frequency tone signal from the local oscillating frequency for intermediate frequency conversion and the first frequency tone signal. The repeater up-converts the second intermediate frequency signal to the output frequency based on the second frequency tone signal, and transmits the signal. | 10-21-2010 |
20100284445 | INSERTED PILOT CONSTRUCTION FOR AN ECHO CANCELLATION REPEATER - In one embodiment, a device for constructing a pilot signal for use in a wireless repeater where the pilot signal is added to a transmit signal includes one or more pilot generators. Each pilot generator generates a carrier pilot signal associated with a single carrier of the transmit signal and the carrier pilot signals generated by the one or more pilot generators are summed to generate the pilot signal. Each of the one or more pilot generators includes a pilot symbol unit providing multiple data symbols having a predetermined data structure as the carrier pilot signal, a pilot scrambler, a filter, a pilot power determination unit, and a cyclic prefix insertion unit for inserting a cyclic prefix, to the carrier pilot signal. In another embodiment, the pilot symbol unit providing multiple data symbols in frequency domain as the carrier pilot signal. | 11-11-2010 |
20100284446 | Method and Apparatus for MIMO Repeater Chains in a Wireless Communication Network - In one or more embodiments taught herein, a multi-band MIMO repeater is configured to translate normal wireless mobile bands into other frequency bands in the physical layer. An advantageous, multi-hop repeater chain includes two or more such repeaters, for propagating downlink signals from a base station, and for propagating uplink signals to the base station. Each such repeater may use paralleled homodyne structure transceivers for better SNR, spectrum combiners for uplink signal aggregation, spectrum separators for downlink signal de-aggregation, water mark signal inserters for optimization, and, among other things, spectrum analyzers for frequency band selection. In at least one such embodiment, a multi-hop repeater chain is configured for MIMO operation in an LTE Advanced or other MIMO network, to deliver high data rate over larger distances—e.g., further away from cell base stations. | 11-11-2010 |
20100284447 | FREQUENCY DOMAIN FEEDBACK CHANNEL ESTIMATION FOR AN INTERFERENCE CANCELLATION REPEATER INCLUDING SAMPLING OF NON CAUSAL TAPS - A method for estimating a feedback channel for a wireless repeater uses frequency domain channel estimation on samples of a pilot signal and samples of a receive signal. The pilot signal samples may be delayed to align the largest channel tap to a given reference time. A time domain feedback channel is generated by retaining both the causal taps and the non-causal taps of the channel estimate. | 11-11-2010 |
20100303133 | VEHICLE-MOUNTED RELAY CONNECTION UNIT - A message is efficiently relayed in a cut-through mode to a communication line of the transmission destination of a transmission rate higher than that of the communication line of the recipient while preventing the state that there is no data to be transmitted. A vehicle-mounted relay connection unit is used to relay messages received through first CAN communication lines to a second CAN communication line of a transmission rate higher than that of the first transmission lines in a cut-though mode. A relaying section measures the time difference between the time when the reception of the control field of a message among the messages simultaneously received through the first CAN communication lines is completed earliest and the time when the reception of the control field of another message is completed, determines the transmission waiting time from the completion of the reception of the control field of each message, and first relays the message such that the sum of the transmission waiting time and the time difference of the reception completion is small to the second CAN communication line. | 12-02-2010 |
20100303134 | WIRELESS RELAY DEVICE AND WIRELESS RELAY METHOD - A device and a process which enable use of transmission diversity in transmission to a receiving station when wirelessly relaying wireless signals from a transmitting station to the receiving station. A reception antenna RA in a wireless relay device (RS) receives from the transmitting station such as a base station (BS) a signal in which data signals are respectively allocated to carriers at adjacent radio frequencies. The wireless relay device performs space frequency block coding (SFBC) of the received signal. Then, the wireless relay device transmits SFBC-encoded signals through two transmission antennas SA | 12-02-2010 |
20100316096 | METHOD AND APPARATUS FOR SYNCHRONOUS HARQ OPERATION AND INTERFERENCE AVOIDANCE - A method and apparatus for avoiding a collision. A collision may be avoided by allocating a first set of subframes to a backhaul link transmission, and allocating a second set of subframes to an access link transmission. In one example, the second set of subframes may be a non-overlapping set of subframes with respect to the first set of subframes. In a second embodiment, a collision may be avoided by receiving a data transmission from an evolved Node-B (eNB) and transmitting an uplink (UL) grant to a wireless transmit/receive unit (WTRU) and a first acknowledgement (ACK) to the eNB. The transmission may be in response to the received data transmission. The RN may avoid a collision by further transmitting an automatic ACK to the WTRU and transmitting a second UL grant to the WTRU. In a third embodiment, a collision between an access link transmission and a backhaul link transmission may be avoided by detecting a collision and determining an interface priority based on a collision occurrence type. | 12-16-2010 |
20100316097 | JOINT ANALOG NETWORK CODING AND RELAY METHOD, BASE STATION AND USER EQUIPMENT - The present invention provides a joint analog network coding and relay method, a reception method, a base station, and a user equipment for use in a cellular network with a wireless relay. Said relay method comprises steps of: receiving information signals from a plurality of base stations eNB; sampling and ADC the received signals; analog network coding the analog signal levels carrying the information signals from the plurality of eNBs; forwarding symbols after being analog network coded; and receiving the forwarded symbols and converting the symbols into the information signals. Wireless relay joint with analog network coding is a low-cost, low-complexity solution which could improve the service transmission performance when UE is at the cell edge, and increase the cell coverage. | 12-16-2010 |
20110002367 | DIGITAL REPEATER HAVING BANDPASS FILTERING, ADAPTIVE PRE-EQUALIZATION AND SUPPRESSION OF NATURAL OSCILLATION - Repeaters, event those having digital processing, exist. The significant drawback of these digital repeaters is that the computational complexity or the processing speed has to be very high in order to guarantee, particularly when compensating for echo, that the necessary delay does not excessively impair the performance. The aim of the invention is to provide a structure of the repeater in which the computational complexity is reduced without this reduction having a negative effect on the performance during signal filtering and/or suppression of natural oscillation. To this end, the invention provides that in order to carry out bandpass filtering, adaptive pre-equalization and suppression of the natural oscillation, the components of the repeater in the uplink branch and downlink branch are arranged in a designated sequence, whereby duplex filters are used for coupling both repeater branches to the antennas. In addition, only one reconfiguration in the modules at the user is necessary in order to adapt to user-specific requirements. The invention is used in the field of digital repeaters for data systems technology and telecommunications technology. | 01-06-2011 |
20110007784 | RELAY DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD - Even when an amplifier has a comparatively narrow linear region in a terminal, it is possible to suppress degradation of the transmission characteristic by using single-carrier transmission between the terminal and a relay device while using multi-carrier transmission between the relay device and a base station on an uplink of a communication system. The relay station ( | 01-13-2011 |
20110013676 | DIGITAL PROTECTIVE RELAY DEVICE AND DATA TRANSMISSION DEVICE FOR THE SAME - Provided is a high-precision and highly functional digital protective relay device and a data transmission device for a digital protective relay device, by enabling transmission of large amounts of system electrical quantity data. The data transmission device for a digital protective relay device, the transmission device comprising: an analog/digital conversion portion | 01-20-2011 |
20110044379 | METHOD AND APPARATUS FOR PROVIDING TRANSMISSION RELAY USING SOFT SYMBOL ESTIMATION - An approach is provided for relaying signals. A signal is received over a communication link and demodulated. Soft symbols are estimated based on probability information corresponding to the demodulated signal. The demodulated signal is remodulated based on the soft symbols. A relay signal is output based on the remodulated signal. | 02-24-2011 |
20110051784 | RELAY METHOD AND RELAY APPARATUS - A wireless signal relay method comprises: receiving a wireless signal transmitted by mapping a first signal to be relayed in a repetitive manner to a plurality of wireless resources; generating a combined signal by combining signals repetitively mapped as the first signal to be relayed; and transmitting the combined signal. | 03-03-2011 |
20110069743 | Apparatus and method for configuring frame structure in relay wireless communication system - An apparatus and method for reduces an overhead caused by an operation transition gap in a Relay Station (RS) of a relay wireless communication system. The method includes identifying a signal delay time with an upper node. A transmission/reception operation transition time is determined through a negotiation with the upper node. An idle time is identified. An overhead caused by a transmission/reception operation transition is determined with consideration of a start time point of an Uplink (UL) subframe dependent on the signal delay time, the transmission/reception operation transition time, and the idle time. And communication is performed considering the overhead. The start time point of the UL subframe is set earlier than a start time point of a UL subframe of the upper node in consideration of the idle time. | 03-24-2011 |
20110085584 | LONG-REACH ETHERNET SYSTEM AND RELAY - The present invention discloses a long-reach Ethernet system. The system includes a first Ethernet device and a second Ethernet device which communicate with each other, and a relay; wherein one of the first Ethernet device and the second Ethernet device is a conventional Ethernet device, and the other one of the first Ethernet device and the second Ethernet device is a conventional Ethernet device or a long-reach Ethernet device; the first Ethernet device and the second Ethernet device communicate with each other via the relay; and the relay is adapted to transform conventional Ethernet data into long-reach Ethernet data and transform long-reach Ethernet data into Ethernet data. The present invention can realize the communication of two Ethernet devices when at least one of the two Ethernet devices is a conventional Ethernet device and a working distance between them is longer than 100 meters. | 04-14-2011 |
20110085585 | WIRELESS COMMUNICATION SYSTEM, WIRELESS COMMUNICATION APPARATUS, AND BUFFER CLEARING METHOD - A wireless communication apparatus wherein the buffer size can be reduced without increasing the overhead of signalings. In this apparatus, a buffer ( | 04-14-2011 |
20110110401 | MODULAR DIGITAL PROCESSING SYSTEM FOR TELECOMMUNICATIONS SATELLITE PAYLOADS - A telecommunications satellite payload processing system having one or more identical generic integrated processor modules is provided. The number of integrated processor modules can be selected in accordance with the antenna and bandwidth characteristics of a specified mission uplink and downlink in relation to the characteristics of the integrated processor module. | 05-12-2011 |
20110142103 | RELAY APPARATUS, DATA RELAY METHOD, AND COMMUNICATION SYSTEM - A relay apparatus includes: a transfer unit to transfer data from a preceding-stage communication apparatus to a subsequent-stage communication apparatus; a receiving unit to receive abnormality information indicating an abnormality of the data transferred by the transfer unit from the subsequent-stage communication apparatus; and a switching unit to switch a transfer destination of the data by the transfer unit on a basis of the abnormality information received by the receiving unit. | 06-16-2011 |
20110142104 | Base and Repeater Stations - A base station repeater station pair, comprising: a base station ( | 06-16-2011 |
20110150048 | Telecommunication Signaling Using Nonlinear Functions - One exemplary embodiment can describe a method for communicating. The method for communicating can include a step for identifying characteristics of a communications channel, a step for identifying a set of nonlinear functions used to generate waveforms, a step for assigning a unique numeric code to each waveform, a step for transmitting a numeric sequence as a series of waveforms, a step for receiving the series of waveforms, and a step for decoding the series of waveforms. | 06-23-2011 |
20110158294 | WIRELESS RELAY APPARATUS AND WIRELESS RELAY METHOD - A wireless relay apparatus relaying wireless communication between a transmission station and a receiving station includes M (M is an integer >1) receiving antennas receiving a radio signal from the transmission station, a signal processing section performing orthogonal transformation and phase rotation on M received signals received by each of the receiving antennas as an input signal so as to obtain M output signals having a same average power level, and M transmission antennas individually transmitting the M output signals obtained by the signal processing section to the receiving station. | 06-30-2011 |
20110158295 | RELAY DEVICE AND WIRELESS RELAY METHOD - A relay device for relaying wireless communication between a transmission device and a reception device includes a buffer configured to temporarily store first data that is a relay object so that the first data is retransmitted to the reception device, a buffer control unit configured to restrict the first data from being stored in the buffer when, based on information acquired using a signal fed back from the reception device, it is determined that a chance of retransmitting the first data is low, and a retransmission request unit configured to request the transmission device to retransmit the first data when the first data is not stored in the buffer and the first data is to be retransmitted to the reception device. | 06-30-2011 |
20110164661 | Insertion of Signals by an Intermediate Device - A method is performed by an intermediate device in a multi-hop wireless network. The method includes receiving a transmission to forward to another device and synchronizing with the transmission based on a format of the transmission. The method further includes selecting a resource portion of the transmission based on information included in the transmission or information previously received, and inserting a signal in the selected resource portion of the transmission. The method also includes forwarding the transmission that includes the signal to the other device. | 07-07-2011 |
20110176583 | WIRELESS COMMUNICATION SYSTEM AND METHOD FOR PERFORMING COMMUNICATION IN THE WIRELESS COMMUNICATION SYSTEM - Provided are a wireless communication system and a method of performing communication in the same. The wireless communication system includes a terminal configured to classify all subcarriers into a first group and a second group and allocate subcarriers of the first group to first symbols and subcarriers of the second group to the first symbols again to generate and transmit a first transmission signal, a base station configured to allocate the subcarriers of the first group to second symbols and the subcarriers of the second group to third symbols to generate and transmit a second transmission signal, and a relay configured to receive the first and second transmission signals and perform maximum likelihood (ML) determination of frequency domain signals of the first and second transmission signals to estimate the first to third symbols. | 07-21-2011 |
20110176584 | COMMUNICATION SYSTEM AND COMMUNICATION METHOD - A communication system including: a first device that includes first and second units and a first encapsulation unit encapsulating data; a second device that includes a third unit communicating data with the second unit, a fourth unit, and a second encapsulation unit encapsulating data; a third device that includes a fifth unit communicating data with the first or third unit, a sixth unit, and a third encapsulation unit encapsulating data; and a fourth device that includes a seventh unit communicating data with the first or third unit, an eighth unit communicating data with the fifth unit, and a fourth encapsulation unit encapsulating data; wherein at least two of the first to fourth devices include control units that control the units that the at least two of the first to fourth devices have, so as not to transfer received data to other devices. | 07-21-2011 |
20110176585 | METHOD FOR RELAYING OF RELAY HAVING MULTIPLE ANTENNA IN WIRELESS COMMUNICATION SYSTEM - A method for relaying performed by a relay station is provided. The method includes receiving a signal from a source station through at least one receive antenna, defining a connection structure between the at least one receive antenna and at least one transmit antenna, processing the signal by using a midcoding matrix, and transmitting the processed signal to a destination station through the at least one transmit antenna. Quality of signal transmission can be enhanced. | 07-21-2011 |
20110188548 | GRID OF GROUND STATIONS FOR RECEIVING AND STORING SATELLITE DATA - A device, referred to as a satellite grid, includes a plurality of reception and storage ground stations ( | 08-04-2011 |
20110206094 | System and Method for Communications in Communications Systems with Relay Nodes - A system and method for communications in communications systems with relay nodes are provided. A communications controller includes a communications control unit, a bearer control unit coupled to the communications control unit, and a mapping unit coupled to the bearer control unit. The communications control unit manages resources and schedules transmission opportunities, the bearer control unit manages radio bearers for relay nodes coupled to the communications controller, and the mapping unit provides a mapping of user bearers to radio bearers. | 08-25-2011 |
20110206095 | IDENTIFICATION, ALIGNMENT AND CROSS POLARIZATION OPTIMIZATION FOR ORTHOGONAL POLARIZED TRANSMISSION AND RELAY SYSTEMS - A method of and system for distinguishing polarizations and information about the carrier signals transmitted from a repeating relay comprising encoding, using an encoder, a first data stream and a second data stream at a repeating relay, modulating, using a modulator, the first and second encoded data streams at the repeating relay, spreading, using a spreader, the first modulated data stream such that a first spread waveform results having first spreading characteristics and the second modulated data stream such that a second spread waveform results having second spreading characteristics, wherein the first spreading characteristics and the second spreading characteristics are different and differentiate the first spread waveform from the second spread waveform, and transmitting the first spread waveform as a first spread spectrum carrier signal on a first electromagnetic polarization and the second spread waveform as a second spread spectrum carrier signal on a second EM polarization. | 08-25-2011 |
20110206096 | METHOD AND SYSTEM FOR ACQUIRING AND REPATRIATING SATELLITE DATA - A method of acquiring and repatriating satellite data representative of a zone in space, termed the target zone, and an instrument for acquiring and repatriating satellite data including a plurality of satellites ( | 08-25-2011 |
20110211618 | RESOURCE MANAGEMENT AND INTERFERENCE MITIGATION TECHNIQUES FOR RELAY-BASED WIRELESS NETOWORKS - Embodiments of a system and methods for resource management and interference mitigation techniques for relay-based networks are generally described herein. Other embodiments may be described and claimed. | 09-01-2011 |
20110211619 | PROTECTIVE RELAY AND METHOD FOR CONTROLLING THE SAME - According to one embodiment, a protective relay performs the following steps. A/D converter | 09-01-2011 |
20110216813 | Method and Arrangement in a Communication System - Method and arrangement in a relay node, for cancelling self-interference. The relay node is connected to one or more reception antennas, which reception antennas are configured to receive wireless signals. The method comprises receiving an analogue input signal, converting each received analogue input signal into a digital signal, processing the digital signal, extracting a cancellation signal from each respective digitally processed digital signal, combining and filtering the extracted cancellation signals into a number of combined cancellation signals, converting each combined cancellation signal into an analogue cancellation signal, and subtracting each analogue cancellation signal from the analogue input signal. | 09-08-2011 |
20110228821 | ADAPTIVE EQUALIZING REPEATER WITH OUTPUT CONTROL - A repeater includes at least an adaptive equalizer able to equalize a received signa. An adaptation function that determines the optimal equalizer settings based on the received signal is either integrated in the repeater or closely associated with the repeater. The repeater also has the capability to mute the output signal under control of the adaptation logic, while receiving an input signal which is used to perform the adaptation function. | 09-22-2011 |
20110268161 | REPEATING FOR LOW-OVERHEAD COMMUNICATION IN A NETWORK - Communicating between stations over a shared medium comprises: receiving, at a destination station, a first waveform that includes one or more segments of a payload that originated from an origin station with a sequence of multiple segments, the one or more segments included in the first waveform having been transmitted over the shared medium by the origin station and by each of one or more repeater stations, and the first waveform indicating which of the sequence of multiple segments were not correctly decoded by at least one of the repeater stations; generating, based on the first waveform, acknowledgement information that specifies which of the sequence of multiple segments have been correctly decoded by the destination station; and transmitting a second waveform from the destination station over the shared medium, the second waveform including the acknowledgement information. | 11-03-2011 |
20110274145 | INTERFACE MODULE FOR A UNIT OF AN ANTENNA DISTRIBUTION SYSTEM, AND ANTENNA DISTRIBUTION SYSTEM - An interface module ( | 11-10-2011 |
20110286500 | SYNCHRONIZATION DEVICE AND METHOD OF RADIO-FREQUENCY REPEATER - A synchronization method of a radio repeater includes: using a first signal, a second signal, and a received signal including the first signal and the second signal to calculate correlation values of the first signal and the second signal; using the first signal correlation value, the second signal correlation value, and the power value of the received signal to output normalized correlation values; subtracting the normalized correlation value of the first signal and the normalized correlation value of the second signal; and detecting a start interval of the second signal based on the subtraction result and outputting a synchronization signal to synchronize the radio repeater. | 11-24-2011 |
20120014417 | SYSTEM AND METHOD FOR TRANSMITTING PILOT AND DATA SYMBOLS IN A RELAYED-WIRELESS COMMUNICATIONS NETWORK - Techniques are generally described for estimating a communication channel using wirelessly transmitted and retransmitted signals, each transmitted at a different power ratio. An example wireless communications system may include a base station, a relay station and a wireless device. The base station may include a transmitter configured to transmit a first signal, wherein the first signal includes pilot and data symbols with a first power ratio. The relay station may include a receiver configured to receive the first signal, and a transmitter configured to retransmit the first signal as a second signal, wherein the second signal includes pilot and data symbols with a second power ratio. The wireless device includes a receiver configured to receive the first and second signals, i.e. the transmitted and retransmitted pilot and data symbols having the first and second power ratios are received, and estimate a communications channel from the received signals. | 01-19-2012 |
20120027054 | METHOD AND APPARATUS FOR ENABLING SIGNAL PROCESSING IN A MULTIPLE ANTENNA REPEATER - Systems and methodologies are described that enable serving cell selection in a wireless network with a multiple antenna repeater operable to support MIMO communications. In one example, a repeater using orthogonal frequency division multiplexing on the downlink can be equipped to receive, by one or more receive antennas, one or more signals using one or more radio frequency (RF) isolation schemes. The repeater can further be equipped to amplify and delay the one or more signals using one or more combination schemes. Moreover, the repeater can be equipped to transmit, by one or more transmit antennas, the amplified and delayed one or more signals, wherein at least one of the one or more receive antennas or the one or more transmit antennas includes two or more antennas. | 02-02-2012 |
20120057619 | RELAY APPARATUS AND RELAY METHOD - A relay apparatus is disclosed for relaying a signal from a transmitter to a receiver in a MIMO (Multiple Input Multiple Output) based communication system, comprising: a power difference determination unit configured to determine a difference of reception levels between a direct wave and a relayed wave based on positional relationship among the transmitter, the relay apparatus and the receiver, the direct wave traveling from the transmitter to the receiver without the relay apparatus, the relayed wave traveling from the transmitter to the receiver via the relay apparatus; a gain determination unit configured to determine an amplification gain of the relay apparatus to make the difference smaller; and a transmitting unit configured to amplify the signal from the transmitter at the determined amplification gain and transmit the amplified signal to the receiver. | 03-08-2012 |
20120057620 | RADIO COMMUNICATION DEVICE, RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION METHOD, AND PROGRAM FOR EXECUTING RADIO COMMUNICATION METHOD - A radio communication system of the present invention comprises a radio communication device which transmits or receives a first beacon signal and a second beacon signal. A beacon transmission radio communication device transmits the first beacon signal in a preset timing pattern P | 03-08-2012 |
20120063492 | METHOD AND APPARATUS OF OBTAINING TIMING IN A REPEATER - Methods and apparatuses are provided that include a mobile station modem (MSM) embedded in a repeater for enhancing repeater functionality. The MSM can determine a timing of a base station based on one or more signals received therefrom. Using the timing, the repeater can align timing to that of the base station, determine cyclic prefix of the received signals, cancel echo from received signals, switch between receiving uplink and downlink signals, transmit PRSs according to the timing, and/or the like. | 03-15-2012 |
20120063493 | TRANSMISSION RATE CONTROL METHOD, TRANSMISSION UNIT, AND COMMUNICATION SYSTEM - A transmission unit includes: transmission rate control means for controlling a transmission rate; first transmission error detecting means for detecting data loss caused due to congestion in a transmission network; and second transmission error detecting means for detecting data loss (for example, packet loss) caused due to data error in the communication network. In the transmission unit, the transmission rate control means controls the transmission rate separately for a case where the first transmission error detecting means has detected data loss and a case where the second transmission error detecting means has detected data loss caused due to data error. | 03-15-2012 |
20120087395 | Code Block Selection Combining in Multi point Reception Up-Link Data Transfer - It is described a method for transferring data from a user equipment ( | 04-12-2012 |
20120099622 | REPEATER CIRCUIT WITH MULTIPLEXER AND STATE ELEMENT FUNCTIONALITY - A circuit implementing multiplexer, storage, and repeater functions is disclosed. The circuit includes first and second input stages having first and second data inputs, respectively. An output stage is configured to drive an output signal. The first input stage is configured to activate the output stage responsive to a first condition, while the second input stage is configured to activate the output stage responsive to a second condition. An intermediate stage is configured to deactivate the output stage at a first delay time subsequent to one of the first or second input stages activating the output stage. The repeater circuit also includes a storage element configured to store a state of the output signal, and further configured to cause the output node to be held at the state of the output signal subsequent to deactivation of the output stage. | 04-26-2012 |
20120099623 | Satellite Signal Frequency Translation and Stacking - An outdoor satellite receiving unit (ODU) receives several independent satellite signals, selects two signals with a switch matrix, downconverts the two signals to a bandstacked signal with a high and a low band signal, and outputs the bandstacked signal on the same cable to receiver units. Several satellite signals can be selected in groups of two or more and output to independent receiver units. Signal selecting is performed at the received radio frequency (RF) and bandstacking is performed with a single downconversion step to an intermediate frequency (IF). Channel stacking on the same cable of more than two channels from several satellites can be achieved by using frequency agile downconverters and bandpass filters prior to combining at the IF output. A slow transitioning switch minimizes signal disturbances when switching and maintains input impedance at a constant value. | 04-26-2012 |
20120106598 | SIGNAL PROCESSING METHOD FOR TERRESTRIAL REPEATER - A signal processing technology for allowing a repeater to transmit a signal received from an external apparatus to a terminal is provided. In a satellite system, a signal transmitted from a satellite or transmitted to a satellite is subject to a low order modulation, and a terrestrial repeater performs a high order modulation on signals and retransmits the signals. | 05-03-2012 |
20120106599 | CONSTELLATION ROTATION RELAY SYSTEM AND CONSTELLATION ROTATION RELAY METHOD - Provided is a constellation rotation relay system and constellation rotation relay method which can acquire full diversity gain by performing constellation rotation for a channel matrix in a relay network when configuring a virtual MIMO channel. The constellation rotation system includes a matrix creator for creating a symbol matrix by configuring a symbol transmitted in parallel from a source of a relay network; and a constellation rotation unit constellation rotating the symbol in the symbol matrix by adding a constellation rotation matrix to the created symbol matrix. | 05-03-2012 |
20120114021 | METHOD AND APPARATUS FOR CONFIGURING A TRANSMISSION MODE FOR A BACKHAUL LINK TRANSMISSION - Provided is a method for configuring a transmission mode for a backhaul link transmission in a radio communication system including a relay station. The method comprises: a step in which a base station transmits, to the relay station, a relay-physical downlink control channel (R-PDCCH) containing backhaul control information; and a step in which the base station transmits, to the relay station, a relay-physical downlink shared channel (R-PDSCH) containing backhaul data, wherein the R-PDCCH is transmitted in one transmission mode selected from a plurality of predetermined transmission modes, and a reference signal transmitted through the R-PDCCH for the demodulation of the R-PDCCH is determined in accordance with said selected transmission mode. | 05-10-2012 |
20120120988 | REPEATER AND SELF-EXCITATION DETECTING METHOD AND SYSTEM - The present invention relates to the communication field and provides method and system for detecting repeater self-excitation and the repeater using the method and system. The method includes detecting an output power of an up link; judging whether the detected output power of the up link exceeds a threshold of self-excitation and, if so, adding a numerically-controlled attenuation to the up link accordingly; and judging whether the change in the output power of the up link is equal to that in the numerically-controlled attenuation and, judging whether the repeater is subject to a self-excitation according to the result of judgment regarding the change in the output power of the up link. The repeater self-excitation detecting method has the following advantages: 1. The self-excitation can be detected in time, thus avoiding had effect on the communication system; 2. The devices of repeater can be protected from being burned down; and 3. The cost incurred by the patrol inspection personnel can be reduced, | 05-17-2012 |
20120128037 | ASYNCHRONOUS FIFO CIRCUIT FOR LONG-DISTANCE ON-CHIP COMMUNICATION - The disclosed embodiments provide a first-in, first-out (FIFO) circuit that operates asynchronously. The FIFO circuit includes a data path that contains data latches sequentially connected through data-wire segments. The FIFO circuit also includes a control circuit that generates control signals for the data latches so that the data path behaves like a FIFO. The control circuit includes control components sequentially connected to each other through control-wire segments and repeaters located within the control-wire segments. The control components are configured to asynchronously generate the control signals for the data latches, and the repeaters are configured to repeat asynchronous signals communicated between the asynchronous control components. | 05-24-2012 |
20120128038 | Repeater for mimo signals in a network - A system to repeat MIMO signals in a network by orthogonally polarizing the signals and maintaining the orthogonal polarization. | 05-24-2012 |
20120128039 | METHOD AND APPARATUS FOR TRANSMITTING AND RECEIVING CONTROL CHANNEL FOR RELAY BACKHAUL LINK IN WIRELESS COMMUNICATION SYSTEM - The present invention relates to a method and an apparatus for transmitting and receiving a control channel for a relay backhaul link in a wireless communication system. In the transmission method of a control channel for a backhaul link in a base station of a wireless communication system according to one aspect of the present invention, the base station (BS) divides and allocates a 1 | 05-24-2012 |
20120147930 | WIRELESS RELAY DEVICE AND WIRELESS RELAY METHOD - Disclosed is a wireless relay device wherein the number of stream multiplexes between a wireless transmission device and a wireless reception device can be increased without increasing the number of antennas for the wireless transmission device or the number of antennas for the wireless reception device. Specifically disclosed is a wireless relay device ( | 06-14-2012 |
20120155513 | Repeater Using Baseband Data - A repeater receives an input signal containing mobile/handheld (M/H) data received in an M/H frame equivalent in size to 20 VSB data frames. Each VSB frame contains an odd VSB field and an even VSB field, and each of the VSB fields includes one field sync segment and 312 data segments. The M/H frame includes main data and M/H data, and the M/H data has more robust coding than the main data. The input signal, is received and demodulated to produce an MPEG transport steam. Frame registration is found so as to find data and field syncs in the MPEG transport steam. The trellis encoder is reset prior to the M/H training data in to the mobile data stream. The data is VSB modulated, the field syncs are added to the modulated data to reconstruct the M/H frame, and the M/H frame upconverted to an RF output signal. The RF output signal is retransmitted. | 06-21-2012 |
20120163422 | SYSTEM, APPARATUS, AND METHOD FOR COMMUNICATING WAKE-UP SIGNAL, AND WIRELESS TERMINAL - A wake-up signal communication system including a wake-up center, a wake-up signal repeating apparatus, and a wireless terminal is provided. The wake-up center transmits the first wake-up signal. The wake-up signal repeating apparatus generates the second wake-up signal with the first wake-up signal and the code of the wireless terminal, and transmits the second wake-up signal. The wireless terminal determines a wake-up based on the second wake-up signal. | 06-28-2012 |
20120163423 | APPARATUS AND METHOD FOR FRAME SYNCHRONIZATION IN SATELLITE COMMUNICATION SYSTEM - Provided is a frame synchronization apparatus capable of reducing the amount of total computation and computation delays when a receiver of a satellite communication system calculates correlation between an input signal for frame synchronization and a signal sequence of the receiver, since the receiver uses no multiplier. The frame synchronization apparatus includes a correlator to obtain a correlation vale of a unique word of a receiver with respect to a symbol data stream of a frame received from a transmitter of the satellite communication system, a comparator to compare the correlation value to a predetermined threshold value, and a determiner to determine whether the frame has been synchronized, based on the result of the comparison by the comparator. | 06-28-2012 |
20120170619 | METHOD FOR SENDING AND RECEIVING DATA ON A COOPERATIVE COMMUNICATIONS SYSTEM AND A COOPERATIVE COMMUNICATIONS METHOD - A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node. | 07-05-2012 |
20120207193 | METHOD AND APPARATUS OF PHYSICAL LAYER NETWORK CODING - Provided is a physical layer network coding method and apparatus. A relay node determines reliabilities of symbols of nodes, based on a signal received from the plurality of nodes, and generates a transmission signal that maintains reliabilities of symbols that have high reliabilities and excludes components of symbols that have low reliabilities. The relay node generates the transmission signal that reduces an expected power of error, based on the received signal. | 08-16-2012 |
20120224610 | Method and Arrangement For Self Interference Cancellation - The present invention relates to a method and arrangement for receiving an OFDM signal and forwarding the received OFDM signal comprising OFDM symbols of a wireless OFDM communication network. The wireless OFDM communication network includes self-interference cancelling functionality and each received OFDM symbol to be forwarded is prefixed with a cyclic prefix (CP) which is a copy of the last part of the OFDM symbol. In the method a delay for delaying an interference generating feedback signal is determined such that an OFDM symbol of the interference generating feedback signal overlaps within a margin of a length of the CP with an OFDM symbol of the received OFDM signal, and interference generating feedback signal is delayed with the determined delay. Furthermore may the duration of the impulse be shortened as well. | 09-06-2012 |
20120250734 | DATA OUTPUT CIRCUIT OF SEMICONDUCTOR APPARATUS - A data output circuit of a semiconductor apparatus includes a clock skew compensation repeater configured to control a delay amount of a clock in response to skew compensation codes and output a data synchronization clock; a mismatch compensation driver configured to synchronize internal data with the data synchronization clock and output the internal data synchronized with the data synchronization clock by controlling a transition timing of the internal data according to mismatch compensation codes; and a data output driver configured to generate output data in response to an output of the mismatch compensation driver. | 10-04-2012 |
20120263210 | System and Method for Two-way Relaying with Beamforming - A system and method for two-way relaying with beamforming are provided. A method for relay operations includes estimating communications channels between a relay and communications devices coupled to the relay, storing data contained in the transmissions, storing data contained in the transmissions, precoding a transmission including a subset of the stored data with a precoding matrix, and transmitting the precoded transmission. The estimating is based on transmissions made by the communications devices in the subset of communications devices, and the precoding matrix is based on estimates of the communications channels. | 10-18-2012 |
20120269238 | DEMULTIPLEXING DEVICE, MULTIPLEXING DEVICE, AND RELAY DEVICE - A demultiplexing device that can reduce power consumption. The demultiplexing device includes frequency-conversion and reception low-pass-filter units that perform a frequency converting process and a low-pass filtering process causing a signal to pass through a desired band, perform downsampling to reduce a sampling rate to half of a data rate of an input signal, and output the signal, reception channel-filter units that waveform-shape a signal with a desired frequency characteristic and output the waveform-shaped signal, a filter-bank control unit that generates a clock control signal for supplying a clock to frequency-conversion and reception low-pass-filter units and reception channel-filter units corresponding to signal passage bands, based on channel information, and a reception-clock supply unit that supplies a clock to frequency-conversion and reception low-pass-filter units and reception channel-filter units corresponding to signal passage bands, based on the clock control signal. | 10-25-2012 |
20120287968 | INTERFERENCE CANCELLATION REPEATER INCORPORATING A NON-LINEAR ELEMENT - A wireless repeater employing echo cancellation uses a non-linear element in digital baseband to compress the digital transmit signal waveform, thereby allowing distortions in the transmitter circuit as well as interference to be cancelled. In one embodiment, the repeater applies non-linear baseband compression to the digital transmit signal in the digital domain to reduce the peak-to-average amplitude of the digital transmit signal prior to digital-to-analog conversion and prior to over-the-air transmission and prior to sampling of the digital transmit signal for use as the reference signal for echo cancellation. The intentionally introduced non-linear distortion in the transmit signal improves echo cancellation and stability of the repeater. In one embodiment, the non-linear compression is applied only when the digital transmit signal is at or exceed a given power level or a given gain level. | 11-15-2012 |
20120294335 | Method and System for Inter-PCB Communication Utilizing a Spatial Multi-Link Repeater - Aspects of a method and system for inter-PCB communication utilizing a spatial multi-link repeater are provided. In this regard, a signal may be transmitted between printed circuit boards via one or more repeaters, wherein the repeaters may frequency shift received signals to generate repeated signals. Each of the repeated signals may be generated by quadrature down-converting said received signal by mixing the received signal with a first LO signal pair, up-converting the down-converted signal by mixing it with a second LO signal pair, and adding or subtracting an in-phase portion and a quadrature-phase portion of the up-converted signal. Each repeated signal may comprise one or more signal components and a phase and/or amplitude of each of the components may be controlled to control a directivity of the repeated signals. The repeater may reside on one of the plurality of printed circuit boards. | 11-22-2012 |
20120300816 | OFDM-BASED RELAY-ASSISTED CHANNEL ESTIMATION METHOD - An OFDM-based relay-assisted channel estimation method enables a composite channel (source-relay-destination) to be disintegrated into a source-to-relay channel and a relay-to-destination channel and separately estimated at the destination node in a relay-assisted way. A relay-amble signal is added to a sub-frame when the relay node is forwarding the amplified signals from the source node. Through the relay-amble signal, the second channel estimation from the relay node to the destination node is performed to obtain a second channel coefficient, and then uses an ML (Maximum Likelihood Estimator) algorithm to estimate a first channel coefficient from the source node to the relay node. After having estimated the coefficients of the two channels, the optimum diversity combining is performed at the destination node to improve accuracy of received data. | 11-29-2012 |
20120327977 | FAST BLIND CHANNEL SEARCH - A method for searching a digital transmission having unknown carrier and symbol frequencies in a modulated reception signal, includes performing successive trials of several carrier and symbol frequencies, using decreasing values of the symbol frequency, demodulating the reception signal with the tried carrier frequency, filtering the demodulated signal in a band having a width corresponding to the currently tried symbol frequency, and producing samples of the filtered signal. For each currently tried symbol frequency, forming a complex indicator having a real component and an imaginary component established from the successive samples of the filtered signal such that they have cyclostationary properties and that one of the components tends to cancel when the other component tends towards a relative maximum, building the spectrum of the variation of the complex indicator, searching for a singular spike in the spectrum, and determining the real symbol frequency from the frequency of the spike. | 12-27-2012 |
20120327978 | CONNECTORS FOR COMMUNICATION, COMMUNICATION HARNESS, AND COMMUNICATION SYSTEM - A connector for communication contains a connecting section, which is connected to communication line; and a network controller, which is connected internally to the connecting section, interprets a designated protocol and controls communication; and a transceiver, which makes possible transmission and receipt on the physical layer of the communication line. | 12-27-2012 |
20120327979 | Digital Repeater Module and Method for Relaying Digital Data - There is provided a digital repeater module and method for relaying digital data. The digital repeater module comprises a data reception unit configured to receive digital data from several broadcast devices concurrently, a data transmission unit configured to transmit digital data using a multiple transmission protocols concurrently, and a routing application. The routing application can receive digital data through the data reception unit, identify available data paths for relaying the digital data to desired destinations, and determine transmission metrics for each of the available data paths for relaying the digital data to the desired destinations. The routing application can also select data paths for transmission based on the determined transmission metrics, and transmit the digital data using the selected data paths through the data transmission unit. There is also provided a method for resolving assignment of limited broadcast frequencies using the digital repeater module. | 12-27-2012 |
20130010838 | COMMUNICATION NODE AND PROCEDURE FOR VARIOUS MEANS OF TRANSMISSION - A node and procedure configured for their use in a data signal communication system through N different means of transmission. The node comprises N independent AFEs. Each AFE is configured to receive or transmit the signal on a corresponding means of the N different means of transmission. | 01-10-2013 |
20130010839 | JOINT CONSTELLATION MULTIPLE ACCESS - A method for communication includes defining N respective symbol constellations in a signal space for N transmitters ( | 01-10-2013 |
20130010840 | X-MIMO Systems with Multi-Transmitters and Multi-Receivers - A method and apparatus for transmitting and receiving a wireless transmission of a plurality of data streams in a wireless communication system having a plurality of nodes is disclosed. Each node has multiple antennas. The method involves receiving first and second data streams from respective first and second nodes at a receiver node, causing the receiver node to generate a receive filter for decoding each of the received data streams, and causing the receiver node to transmit receive filter information for each of the first and second data streams, the receive filter information facilitating precoding of the first and second data streams for simultaneous transmission within a common frequency band to the receiver node. | 01-10-2013 |
20130022088 | METHOD FOR TRANSMITTING A DIGITAL SIGNAL FOR A SEMI-ORTHOGONAL MARC SYSTEM HAVING HALF-DUPLEX RELAY, AND CORRESPONDING PROGRAM PRODUCT AND RELAY DEVICE - A method and device are provided for transmitting a digital signal intended for a network having at least four nodes including two transmitters, a relay and a receiver separated from one another by non-orthogonal links, except between the relay and the destination, between which the link is orthogonal, implementing a spatially distributed network code. The method includes: encoding, in each transmitter, supplying a code word for every block of K bits of information; transmitting, in the transmitters, the code word during αN transmission intervals, αε [0,1]; jointly, iteratively detecting/decoding, in the relay, in order to separate interfering streams from the transmitters and to determine, for each stream, a vector representing the K bits of information associated with the code word; jointly encoding, in the relay, the two vectors in order to determine redundancy information, and scheduling the relays to transmit the redundancy information during the (1−α)N following transmission intervals. | 01-24-2013 |
20130028298 | Wide-Band Linked-Ring Antenna Element for Phased Arrays - Technologies for a wide-band linked-ring antenna element covering two adjacent K-band military and/or commercial receive bands are provided. The antenna element comprises a linked-ring conductive resonator that is electromagnetically coupled to at least one feed line. The conductive resonator and feed line are further surrounded by a Faraday cage that is conductively coupled to an electromagnetically-shielding ground plane and operable to shield the conductive resonator and the feed line. | 01-31-2013 |
20130034128 | ECHO CANCELLATION REPEATER OPERATION IN THE ABSENCE OF AN INPUT SIGNAL - A wireless repeater introduces a low level noise to the signal path of the repeater where the introduced noise is used to facilitate channel estimation. The introduced low power level noise may be added to the receive signal or to the transmit signal. The low power noise signal ensures that the repeater always has a reference signal for performing channel estimation, even when the repeater is not receiving any incoming signal traffic. In one embodiment, a low noise signal is inserted to the transmit circuit of the repeater. In another embodiment, the repeater is configured to increase the noise figure of the receive circuit where the detected noise figure acts as a receive signal. | 02-07-2013 |
20130034129 | MULTI-ANTENNA DEVICE - The invention provides a method for self-interference suppression in a multi-antenna device that is part of a communication channel between a transmitter and a receiver of a wireless communication system. The communication system uses the multi-antenna device, the multi-antenna device is located between the transmitter and the receiver and uses antennas and a relay unit forwarding signals from the transmitter to the receiver. The communication channel has a transmit channel, defined by a transmit channel matrix between the transmitter and the multi-antenna device, a receive channel defined by a receive channel matrix, between the multi-antenna device and the receiver and a self-interference channel between an output and an input side of the multi-antenna device. The self-interference channel is defined by a self-interference channel matrix wherein the method comprises the steps of: equipping the multi-antenna device with at least three antennas and; suppressing the self-interference channel by using at least one filtering matrix arrangement being inserted between the antennas and the relay unit. The invention also provides a node in a wireless communication system comprising the multi-antenna device for self-interference suppression in the multi-antenna device module that is part of a communication channel. | 02-07-2013 |
20130083828 | Method And System For Communicating Via A Spatial Multilink Repeater - Aspects of a method and system for communicating via a spatial multilink repeater are provided. In this regard, a received signal may be frequency shifted to generate a plurality of repeated signals, wherein each repeated signal may be shifted by a different frequency with respect to the received signal. Each repeated signal may comprise one or more signal components and a phase and/or amplitude of each of the components may be controlled to control a directivity of the repeated signals. Each of the repeated signals may be generated by quadrature down-converting said received signal by mixing the received signal with a first LO signal pair, up-converting the down-converted signal by mixing it with a second LO signal pair, and adding or subtracting an in-phase portion and a quadrature-phase portion of the up-converted signal. | 04-04-2013 |
20130100988 | WIRELESS RELAYING DEVICE, WIRELESS TRANSMISSION DEVICE, AND WIRELESS RELAYING METHOD - Provided is a wireless relaying device, wherein system capacity can be increased by reducing power consumption required for relay processing at mobile stations equipped with relaying function. This is a relaying node ( | 04-25-2013 |
20130114647 | COMMUNICATIONS RELAY SYSTEM AND RELAY DEVICE IN THE SAME - A communications relay system for establishing data communications between an external device and a plurality of communication devices. In the system, the plurality of communication devices and a relay device are connected to a communication path to form a communication network. The relay device is operable to relay communications between the external device and the plurality of communication devices when being connected to and powered by the external device. With this configuration, the system is capable of reducing power consumption in the relay device to thereby reduce power consumption over the communication network. | 05-09-2013 |
20130114648 | ASSEMBLY AND METHOD FOR THE PARALLEL PROCESSING OF DATA STREAMS BY MEANS OF SATELLITE COMMUNICATION LINKS - The assembly includes a first sub-assembly with, on a transmitter side, a modem having a plurality of inputs, an output for a total data stream, and signal paths connected in parallel. Each signal path includes a modulation stage, a stage for sampling modulated signals and a mixer stage. Outputs of mixer stages are connected to inputs of a summation stage, and output of the summation stage is connected to output of the modem. A second sub-assembly has an input for initialization data connected to an assembly for controlling a test operation. The sub-assembly is connected to a downstream carrier management assembly having a plurality of outputs. Each output is connected to a test sequence generating unit. Outputs of all test sequence generating units are connected to a parallel/serial converter assembly connected downstream of a filter assembly. Output of the filter assembly is connected to output of the second sub-assembly. | 05-09-2013 |
20130114649 | SIGNAL CANCELLATION IN A SATELLITE COMMUNICATION SYSTEM - A satellite communication system comprised of a hub and plurality of remote terminals, wherein the system is configured for frequency reuse, a method and apparatus for signal cancellation are disclosed. The disclosed method and apparatus enable the hub to extract return link signals overlaying a transmitted forward link signal, wherein the forward link signal is transmitted at a power level higher than that of the overlaying return link signals. | 05-09-2013 |
20130114650 | MULTIPLE-IN-MULTIPLE-OUT ANTENNA NETWORK-CODED AMPLIFY-AND-FORWARD RELAYING SCHEME FOR THREE NODE BIDIRECTIONAL COOPERATION - A method and apparatus are described including receiving a first signal including first data in a first time slot of a first channel ( | 05-09-2013 |
20130121383 | MULTIPLE DATA RATE WIRING AND ENCODING - A method and apparatus for using multiple data rate (MDR) wiring with encoding is described herein. Single data rate wires are replaced with MDR wires and signals are processed through MDR circuitry. The MDR circuitry may include MDR driver circuitry, MDR repeater circuitry and MDR receiver/decoder circuitry. An encoding circuit may be included in the MDR circuitry to mitigate power consumption due to signal toggling rates. The MDR circuitry may be implemented at multiple clock rates, and with source synchronous bus circuitry and clock gates. | 05-16-2013 |
20130136156 | COMMUNICATING ELECTRONIC MAP DATA - A method of communicating electronic map data is disclosed, wherein map data is compiled as at least one cell comprising a plurality of vector data records and a plurality of feature data records to, for instance, the IHO S-57 standard. During the compilation, the respective bit lengths of a plurality of vector data values are reduced and both the bit-reduced vector data values and feature data values are entropy encoded. The compiled cell data, which may be an Electronic Navigational Chart, is then compressed, encrypted and digitally signed according to, for instance, the IHO S-63 standard. The encrypted and digitally signed cell data is eventually transmitted to a remote navigational system, which may be an Electronic Chart Display and Information System, over a network, for instance in a satellite telecommunication. A system embodying the method is also disclosed. | 05-30-2013 |
20130142222 | WIRELESS REPEATER IMPLEMENTING MULTI-PARAMETER GAIN MANAGEMENT - A wireless repeater incorporates a gain management block to implement a multi-parameter gain management algorithm. The gain management algorithm receives gain settings from at least a gain control metric for stability and output signal quality and signal headroom values associated with circuitry of the repeater. The gain management block provides secure and robust boot-up of the repeater as well as oscillation detection and prevention. Furthermore, the gain management block implements repeater stability control, output signal-to-noise level control, uplink and downlink gain balance control and compensation for device constraints. | 06-06-2013 |
20130148700 | SYSTEM FOR AMPLIFYING SIGNALS GENERATED BY A SATELLITE SIGNAL GENERATOR UNIT - A system for amplifying signals generated by a unit for generating signals of a satellite, the system including: a first pathway including a first bandpass digital filter with finite impulse response and a first digital/analog converter; frequency transposition means; an amplifying device; a second pathway including a second bandpass digital filter with finite impulse response; gain means disposed at the output of said second digital filter, a phase-slaved numerically-controlled oscillator, and a second digital/analog converter; and a recombiner device for summing the signals of said first and second pathways. | 06-13-2013 |
20130170524 | TRANSMISSION APPARATUS, RECEPTION APPARATUS, AND RELAY APPARATUS - A transmission apparatus included in a communication system together with a reception apparatus and configured to multiplex data from M (M is a natural number equal to or larger than 2) channels and transmit the data to the reception apparatus. The transmission apparatus includes M timing offset units configured to respectively receive inputs of the data from the different channels and insert designated timing offset values in the input data, a multiplexing unit configured to multiplex the M data subjected to the timing offset and output a multiplexed signal, and a timing-offset calculating unit configured to calculate different timing offset values for the respective M timing offset units and output the calculated timing offset values to the respective timing offset units. | 07-04-2013 |
20130177047 | REPEATER USING DIGITAL FILTER AND METHOD FOR DIGITAL FILTERING USING THE SAME - A repeater using a digital filter is disclosed. The repeater comprises a MUX filter for filtering an RF signal received through an antenna or a signal to be transmitted through the antenna; a low noise amplifier for lowering noise of the signal filtered by the MUX filter; a down converter for converting the signal outputted from the low noise amplifier into an IF band signal to digitalize the signal; a digital filter for filtering the digital signal outputted form the down converter based on parameters inputted by a user; a filtering controller for controlling the digital filter by using al filtering coefficient calculated based on the parameters; an up converter for converting the signal filtered by the digital filter into an RF band signal; and a high power amplifier for amplifying the signal outputted from the up converter to a high power signal. | 07-11-2013 |
20130177048 | Receiving Method, Apparatus, and System in Cooperative Communications - A method includes: demodulating a signal transmitted by a first source end that is received to obtain a first log-likelihood ratio; demodulating a signal transmitted by a second source end that is received to obtain a second log-likelihood ratio; demodulating a signal transmitted by a relay node that is received to obtain a third log-likelihood ratio; based on an exclusive OR feature of network coding, processing the first log-likelihood ratio, the second log-likelihood ratio, and the third log-likelihood ratio to obtain a posterior log-likelihood ratio of the first source end; and decoding the signal transmitted by the first source end that is received by using the posterior log-likelihood ratio of the first source end. | 07-11-2013 |
20130188670 | DYNAMIC IMPROVEMENT OF LINK SYMMETRY IN CO-LOCATED PLC AND RF NETWORKS - An electronic communication device comprises a first transceiver capable of a bi-directional communication session on a first communication medium; a second transceiver capable of a bi-directional communication session on a second communication medium; and a control logic coupled to the first transceiver and the second transceiver, wherein the control logic is configured to receive, from the first transceiver, a first signal, and cause, in response to the first signal, data transmitted by the first transceiver on the first communication medium as part of a communication session to be transmitted instead by the second transceiver on the second communication medium while the first transceiver continues to receive data as part of the communication session. | 07-25-2013 |
20130195150 | SIGNAL REPEATER AND METHOD FOR MATCHING AN OUTPUT IMPEDANCE OF THE SIGNAL REPEATER, WHICH AMPLIFIES A SIGNAL ON AN ELECTRICAL LINE OF AN ELECTRICAL GRID, TO AN IMPEDANCE OF A LOAD - A signal repeater includes a port, an amplifier, and an adaptive device. The port is configured to connect to an electrical line of an electrical grid between devices. Communication over the electrical line and between the devices includes transmission of a first signal. The port is configured to receive the first signal from the electrical line. An amplifier is configured to receive a second signal based on the first signal, and amplify the second signal. The port is configured to receive the amplified second signal, and provide the amplified second signal to the electrical line. An adaptive device is configured to, based on the first signal, adjust an output impedance of the signal repeater to match a first impedance of a load on the signal repeater. The first impedance is seen by the signal repeater at the port, and wherein the first impedance includes an impedance of the electrical line. | 08-01-2013 |
20130235910 | COMMUNICATION APPARATUS, ELECTRONIC APPARATUS, RELAY NODE, COMMUNICATION METHOD, AND COMMUNICATION SYSTEM - Provided is a communication apparatus including a port that connects a power line, along which power is transmitted at a given frequency, to an external apparatus, a transmitter that transmits, via the power line, a carrier signal obtained by modulating a transmit signal that has been obtained by encoding a processing command for executing a given process, at a carrier frequency higher than the frequency of the power, and a communication filter, connected between the power line and the transmitter, that at least blocks signals at the frequency of the power, while not blocking signals at the carrier frequency. | 09-12-2013 |
20130259095 | MODBUS REPEATER WITH SELF-ADAPTIVE BAUD RATE AND SELF-ADAPTIVE BAUD RATE SYTEM AND METHOD - Disclosed are a self-adaptive baud rate system and method. The method includes: a) receiving first data and second data; b) judging whether or not a falling edge of a start bit in a synchronization code of the first data and second data is detected; c) if the falling edge is not detected, then return to step b); and if the falling edge is detected, then a first counting is started from a rising edge after the start bit based on a reference clock, and stopped at the next falling edge, and a first count value is obtained; and a second counting is started from the falling edge where the first counting was stopped, and stopped at the next rising edge, and a second count value is obtained; and d) acquiring a baud rate according to the relationships among the first count value and the second count value and a first threshold. By way of using a CPLD to detect the baud rate and encoding format of a Modbus data frame remotely according to the present application, there is no need to manually set the baud rate and encoding format locally. The function of remote auto-detection of the baud rate and encoding format can be achieved by the present application, and the materials and assembly costs of the rotary encoder are omitted. | 10-03-2013 |
20130259096 | NETWORK REPEATER - A network repeater is configured to repeat data packets in a broadcast mode without generating a significant broadcast storm. The network repeater is configured to detect a characteristic of a received data packet. The data packet characteristic is compared with valid copies of packet characteristics previously stored in a packet registry. During a delay period, if a valid copy of the detected characteristic is found in the packet registry, then it is assumed that the packet is being received for the second time and the data packet is not repeated in the broadcast mode. If a valid copy of the detected characteristic of the data packet is not found in the packet registry, then the characteristic is stored in the packet registry and the data packet is repeated in a broadcast mode. | 10-03-2013 |
20130266044 | COMMUNICATION SYSTEM AND TEST APPARATUS - To lower the cost of an apparatus. A test apparatus including a first communication device and a second communication device is provided. The first communication device includes a first transmitting unit that transmits, to the second communication device, a signal including a control code of a code value corresponding to a transmission rate to be used in communication between the first communication device and the second communication device when the communication is not established therebetween, and the second communication device includes: a first receiving unit that receives a signal from the first communication device; and a specifying unit that specifies the transmission rate corresponding to the control code included in the signal transmitted from the first communication device when the communication is not established between the first communication device and the second communication device. | 10-10-2013 |
20130272345 | PACKET COMMUNICATION SYSTEM, EMISSION CONTROL APPARATUS, ANTENNA CONTROL METHOD AND COMPUTER PROGRAM - A packet communication system etc., is proposed, which can automatically adjusting the antenna directionality without modifying a wireless interface of a wireless packet forwarding device even if it involves fluctuation in the packet transmission timing due to CSMA/CA etc. An interference evasion unit involves fluctuation in packet transmission timing due to CSMA/CA. A radio emission device can control the emissive direction and/or emission intensity. A packet generation unit adjusts packet features other than its contents (e.g., packet length, transmission intensity) based on a switching sequence for specifying the emissive direction and/or emissive intensity, and generate a switching control packet. An emission control unit measures the switching control packet feature other than its contents, and identifies at least one bit as antenna control information. The emission control unit controls the overall directionality of a directional antenna unit based on a bit sequence including at least one bit thus identified. | 10-17-2013 |
20130272346 | COVERAGE IMPROVEMENT IN WIRELESS SYSTEMS WITH FIXED INFRASTRUCTURE BASED RELAYS - Infrastructure relays are used to relay signals to multi-antenna receivers where the received signals are then processed using MIMO processing. The transmissions can use spatial multiplexing and/or space time block coding. | 10-17-2013 |
20130301688 | Full Duplex Wireless Transmission with Channel Phase-Based Encryption - A method comprising: at a first transceiver, transmitting a plurality of signals to a second transceiver and receiving corresponding receive signals from the second transceiver, wherein each transmitted signal is sent using a channel perturbation; measuring a plurality of phase values, wherein each phase value is a phase difference between one of the plurality of transmitted signals and corresponding receive signal; masking a subsequent phase modulated signal employing phase rotation at the first transceiver using the plurality of phase values. | 11-14-2013 |
20130308688 | LEX SIGNAL TRACKING METHOD, POSITIONING SIGNAL RECEIVING METHOD, LEX SIGNAL TRACKING PROGRAM, POSITIONING SIGNAL RECEIVING PROGRAM, LEX SIGNAL TRACKING DEVICE, POSITIONING SIGNAL RECEIVING DEVICE AND MOBILE TERMINAL - A LEX signal tracking method of continuously tracking a LEX signal is provided. The LEX signal broadcast from a Quasi-Zenith Satellite is demodulated. A weekend approach notification signal S | 11-21-2013 |
20130329771 | WIDEBAND LOW LATENCY REPEATER AND METHODS - A signal repeater ( | 12-12-2013 |
20130343437 | ECHO CANCELLING SYSTEM AND METHOD FOR ON CHANNEL REPEATER USED FOR COVERAGE GAP FILLING - An echo cancelling system and method for On Channel Repeater (OCR) used for coverage gap filling, which includes: a splitter, an echo cancellation module, a down-conversion module and a digital signal processor (DSP) module, which uses digital signal processing technologies to achieve a precise echo detection/estimation, and to cancel sufficient part of the echoes in analog domain. The invention may also remove residual echoes in digital domain as well, which is considered to be only a great supplement of the echo cancellation operation in analog domain. | 12-26-2013 |
20140003472 | DIGITAL FREQUENCY DEMODULATOR WITH LOW POWER CONSUMPTION AND RELATED SYSTEM AND METHOD | 01-02-2014 |
20140003473 | EXPLICIT CONTROL MESSAGE SIGNALING | 01-02-2014 |
20140050253 | Reducing Distortion in Repeaters for OFDM Signals - Certain aspects and features are directed to determining characteristics such as phase margin and gain margin of signals such as standardized orthogonal frequency-division multiplexing (“OFDM”) signals. In one aspect, a processing system can identify multiple carriers in an OFDM signal communicated by a repeater. The carriers include carriers from frequency guard band other than those used for communicating payload data or pilot data. The processing system can generate dynamic characteristic data to be sent via the carriers. The processing system can generate modulate the carriers with the dynamic characteristic data. The modulated power level of the carriers is less than a maximum level of noise filtered by a device receiving the OFDM signal. | 02-20-2014 |
20140056334 | ENHANCED COMMUNICATION OVER NETWORKS USING JOINT MATRIX DECOMPOSITIONS - The disclosure describes examples of systems and methods for communication networks including multiple-input multiple output MIMO channels. In these examples, based on a novel decomposition of two or more channel matrices or functions thereof, a MIMO channel may be treated as a plurality of parallel scalar additive white Gaussian noise (AWGN) channels. | 02-27-2014 |
20140056335 | ADAPTIVE CODING AND MODULATION APPARATUS AND METHOD FOR FORWARD LINK IN SATELLITE COMMUNICATION - An adaptive coding and modulation (ACM) apparatus and method for a forward link in satellite communication is provided. The ACM apparatus may include a receiving unit to receive a signal-to-noise ratio (SNR) of a received signal, a determination unit to determine whether the SNR of the received signal is less than or equal to a threshold value, and a processing unit to execute a channel prediction algorithm when the SNR of the received signal is determined to be less than or equal to the threshold value. | 02-27-2014 |
20140086283 | PHYSICAL LAYER NETWORK CODING USING FORWARD ERROR CORRECTION CODES - Two network nodes may exchange messages through a relay using physical-layer network coding combined with forward error correction coding (FEC). The relay determines a prime field order based on the channel condition and communicates the field order to the network nodes. Each network node encodes an outgoing message with linear codes over a field such as finite field of the field order, and transmits a signal carrying the encoded outgoing message. The relay receives a composite signal carrying the summation of the messages from the two network nodes. The relay decodes the composite signal and extracts a composite message with linear codes over finite field of field order, and broadcasts a signal carrying the composite message. Each network node receives the signal from the relay and extracts the message intended for it using linear subtraction over finite field of field order. | 03-27-2014 |
20140092943 | METHOD FOR USING POWER LINES FOR WIRELESS COMMUNICATION - The method is for providing broadband access into a dwelling. A radio base station is provided that is in connection with a power-line communication (PLC) gateway. The radio base station transmits an information signal to the PLC gateway. The PLC gateway receives the signal and transmits the information signal via power-line to an inside of the dwelling. | 04-03-2014 |
20140105253 | TWO-WAY RELAY, WIRELESS APPARATUS AND SIGNAL PROCESSING METHOD THEREOF - A two-way relay, a wireless apparatus and a signal processing method thereof are provided. The two-way relay comprises a transceiver and a processor. The transceiver receives a relay receiving signal including a first terminal transmitting signal transmitted by a first wireless apparatus and a second terminal transmitting signal transmitted by a second wireless apparatus. The processor, which is electrically connected to the transceiver, uses a mapping function to transform the relay receiving signal into a relay signal and enables the transceiver to broadcast the relay signal. | 04-17-2014 |
20140112374 | INTERFACE MODULE FOR A UNIT OF AN ANTENNA DISTRIBUTION SYSTEM, AND ANTENNA DISTRIBUTION SYSTEM - An interface module for a unit designed to transmit and/or amplify communication signals inside an antenna distribution system includes a first analog interface for forwarding and receiving communication signals from mobile terminals and a second interface for forwarding and receiving communication signals from the antenna distribution system. A signal path forwards the received communication signals between the first and second interfaces. A controllable digital unit in the signal path is configured for digitizing incoming communication signals to digital signals and converting outgoing communication signals to analog signals. The digital unit is configured to evaluate characteristic signal parameters of the digital communication signals and select a subset of signals from the digital communication signals. The controllable digital unit is further configured for forwarding the selected subset of signals. | 04-24-2014 |
20140119411 | DIGITAL REPEATER HAVING BANDPASS FILTERING, ADAPTIVE PRE-EQUALIZATION AND SUPPRESSION OF NATURAL OSCILLATION - A signal repeating system includes at least one input antenna that receives input signals, at least one output antenna that radiates output signals, and a signal path between the input and output antennas. The signal path includes circuitry for conditioning the input signals with down conversion circuitry that converts input signals to lower frequency signals and analog-to-digital conversion circuitry that converts the input signals to digital signals. A suppression circuit suppresses feedback and interference in the repeated output signals with a digital signal processor configured for receiving samples of the input signals, samples of the output signals, and samples of an interference reference signal and an adaptive filter under the control of the digital signal processor for generating echo cancellation signals and interference cancellation signals. | 05-01-2014 |
20140146859 | EFFICIENT FREQUENCY ESTIMATION - Methods are presented herein for estimating at least a frequency (offset) for a block of received symbols using two or more estimation stages. These methods may allow reducing the computational complexity of a frequency estimator while maintaining large frequency offset coverage and high frequency estimation accuracy. Also are presented satellite communication systems employing any of burst transmission and continuous transmission. Said systems may be configured to estimate at least a frequency (offset) for any of a received burst or a block of received symbols using two or more estimation stages. In some embodiments, said burst or said block of symbols may include a Unique Word located at or about the center of the block of symbols. | 05-29-2014 |
20140233611 | SYSTEM AND METHOD FOR SATELLITE LINK BUDGET ANALYSIS (LBA) OPTIMIZATION - A method of optimizing a link budget analysis comprising performing a first LBA based on a target modulation and coding pair (MODCOD), the MODCOD having a symbol energy to noise density ratio (Es/No), a target setting of a power amplifier, or a target antenna size, determining an excess margin and increasing or decreasing a maximum available MODCOD accordingly, iteratively performing a second LBA, calculating a ratio of allocated bandwidth to PEB and adjusting at least one of the MODCOD, amplifier power, and antenna size, summing a contribution to a final ratio of allocated bandwidth to PEB of the plurality of communications links, accessing a look up table and selecting a new MODCOD or adjusting the amplifier size or antenna size is based on the ratio of allocated bandwidth to PEB and altering one or more transmission or receiving parameters to apply the optimal MODCOD, amplifier size, or antenna size. | 08-21-2014 |
20140241404 | NETWORK-CODING BUILDING BLOCKS AND DECOMPOSITION SCHEDULING BASED THEREON - Methods and systems are disclosed involving physical-layer network coding (PNC) atoms as building blocks of PNC networks to solve the scheduling problem in PNC networks using a decomposition framework based on PNC atoms. Ten PNC atoms and their straightforward network coding (SNC) counterparts are disclosed. Performance evaluation results are discussed, which indicate that decomposition based on the ten PNC atoms outperforms the traditional multi-hop (non-NC) scheduling by about 100%. Furthermore, decomposition based on the ten PNC atoms can yield performance gain of 40% or more compared with decomposition based on the TWRC atom alone. | 08-28-2014 |
20140254638 | RELAY DEVICE AND RELAY METHOD - The present disclosure provides a relay device which relays data, the relay device including a storage unit to store device information of at least one receiving device connectable to the relay device; and a communication unit to transmit the device information to a transmitting device when authentication is performed between the transmitting device and the relay device, the device information being pre-stored in the storage unit before the authentication is performed. | 09-11-2014 |
20140307758 | TRANSMISSION LINE PROTECTIVE RELAY DEVICE - In a protective relay device for a three-terminal transmission line comprising terminal A, terminal B and terminal C, when for example terminal information is transmitted to a protective relay Ry-A of one remote terminal (terminal A) from the protective relay Ry-C of the terminal C, terminal information Db that was sent from the protective relay Ry-B of another remote terminal (terminal B) is transmitted, in addition to the information Dc of the terminal in question. In the same way, when terminal information is transmitted to a protective relay Ry-B of the terminal B from the protective relay Ry-C of the terminal C, terminal information Da that was sent from the protective relay Ry-A of the terminal A is transmitted, in addition to the information Dc of the terminal in question. | 10-16-2014 |
20140348216 | TWO-WAY RELAY TRANSMISSION METHOD AND APPARATUS APPLIED TO MULTI-INPUT MULTI-OUTPUT COMMUNICATION SYSTEMS - A two-way relay transmission apparatus applied to multi-input multi-output communication systems that combines signals received from the terminals and performs a modulo operation to the combined signal to concentrate the signal points towards the center of the constellation. And then, the modulo version of the combined signal is broadcasted. As a result, the peak and average relay transmission powers can be reduced. | 11-27-2014 |
20140376599 | LONG DISTANCE SUBSEA CAN BUS REPEATER CABLE - Messages on controller area network (CAN) buses are communicated over subsea links. Repeaters couple CAN buses to each end of a subsea link. The subsea link may be, for example, a twisted pair or a single wire with a sea ground. The repeater detects a direction of transmission, that is, whether a signal began on the CAN bus coupled to the repeater or on the subsea link coupled to the repeater. Signals from the CAN bus are conditionally transmitted to the subsea link depending on the detected direction of transmission. Signals from the subsea link are conditionally transmitted to the CAN bus depending on the detected direction of transmission. The repeater can operate at the physical layer without analyzing contents of the CAN bus communications. | 12-25-2014 |
20150063428 | SATELLITE COMMUNICATION TERMINAL INSTALLATION - A satellite communication terminal may comprise an outdoor part and an indoor part. Either the indoor part or the outdoor part may comprise a modem configured for communicating with a hub of a satellite communication system via a satellite and the outdoor part of the terminal. Methods are presented for sending indications from the outdoor part of the terminal to the modem, for example, to provide a person that may be installing the terminal with some control over the flow of the installation process while remaining outside (e.g., in the vicinity of the outdoor part of the terminal). In some embodiments, such indications may be used for triggering cross-polarization measurements and/or providing more elaborate information to the person installing the terminal without the need to leave the outdoor part of the terminal. | 03-05-2015 |
20150124857 | FILTER NETWORK ARRANGEMENT - There is provided a filter network arrangement comprising a filter network; and one or more correction networks, wherein the one or more correction networks is arranged to substantially equalise the passband gain and group delay of the filter network arrangement. Given an appropriate Q for the one or more correction networks, a polynomial for the one or more correction networks can be found that equalises both the passband gain and group delay and the one or more correction networks can be synthesised from the polynomial. | 05-07-2015 |
20150146764 | REPEATER FOR POWER LINE COMMUNICATION AND REPEATING METHOD THEREOF - The present disclosure relates to a repeater for power line communication, capable of preventing a ping-pong phenomenon and a loss of data packet and improving communication reliability and communication speed by allowing a power line communication terminal to add its repeater number in a received data packet for transmission, and a repeating method thereof. A repeater for power line communication according to the disclosure comprises a power line communication concentrator to execute communication through a power line, and a plurality of power line communication terminals including a plurality of repeating power line communication terminals each having a repeating function and a repeater number set therefor, and configured to execute the communication with the power line communication concentrator through the power line, wherein the plurality of repeating power line communication terminals receive data packets, and repeat the data packets by adding their own repeater numbers in the data packets, respectively. | 05-28-2015 |
20150372380 | SPACE VEHICLE FIELD UNIT AND GROUND STATION SYSTEM - A field unit and ground station may use commercial off-the-shelf (COTS) components and share a common architecture, where differences in functionality are governed by software. The field units and ground stations may be easy to deploy, relatively inexpensive, and be relatively easy to operate. A novel file system may be used where datagrams of a file may be stored across multiple drives and/or devices. The datagrams may be received out of order and reassembled at the receiving device. | 12-24-2015 |
20160127060 | HIGH TEMPERATURE OPERATION OF AN AIRBORNE SATELLITE TERMINAL - Methods, systems, and devices are described for operating an airborne satellite terminal in high temperature conditions. In one method, a satellite terminal is located within an enclosure beneath a radome on an exterior of an aircraft. The satellite terminal includes a transmit amplifier that may operate in different power modes, a temperature sensor thermally coupled with the transmit amplifier, and an antenna. A transmit signal is amplified using the transmit amplifier to generate an amplified signal, which signal may be transmitted through the radome using the antenna. The temperature of the transmit amplifier may be monitored with the temperature sensor while transmitting the amplified signal. Operation of the transmit amplifier may be switched from a normal power mode to a reduced power mode to reduce a power level of the amplified signal when the monitored temperature of the transmit amplifier exceeds a temperature threshold. | 05-05-2016 |
20160156403 | INTERFACE MODULE FOR A UNIT OF AN ANTENNA DISTRIBUTION SYSTEM, AND ANTENNA DISTRIBUTION SYSTEM | 06-02-2016 |
20160380674 | LOW-LATENCY BI-DIRECTIONAL REPEATER - A repeater circuit is disclosed. The repeater circuit is coupled to a transmission line driven by a first transmitter circuit and configured to detect a signal transition from a first voltage level to a second voltage level at a first position on the transmission line. The repeater circuit then reinforces the signal transition from the second voltage level to a third voltage level at the first position on the transmission line without interrupting a current through the transmission line. | 12-29-2016 |