Patent application number | Description | Published |
20090016309 | APPARATUS AND METHOD FOR ULTRA WIDE BAND COMMUNICATION BASED ON MULTI-CODED BI-ORTHOGONAL PULSE POSITION MODULATION - Provided is a communication system for ultra wide band impulse communication, and more particularly, to a communication apparatus and method that can be used in a sensor network or a low-rate wireless personal area network. To be more specific, the present research suggests a transmitter employing multi-coded bi-orthogonal pulse position modulation/demodulation and a method thereof. The transmitter of the present research provides: a serial-to-parallel converter for convening L-bit serial data to be transmitted into parallel data by performing grouping on the L-bit serial data; a multi-coder for generating a multi-coded symbol by multiplying the parallel data by total L orthogonal codes of length N | 01-15-2009 |
20090067389 | RADIO COMMUNICATION SYSTEM, RADIO COMMUNICATION APPARATUS AND RADIO COMMUNICATION METHOD FOR UWB IMPULSE COMMUNICATION - Provided is a radio communication system for ultra wideband (UWB) impulse communications and a radio communication apparatus and method thereof. The present patent provides a radio communication system that can minimize power consumption by eliminating a need for carrier detection and sharing transmission/reception time information in UWB impulse communications. The system includes a network coordinator; and one or more devices communicating on a superframe basis in subordination to the network coordinator. The devices perform data transmission/reception in predetermined time slots and then they are inactivated to thereby reduce power consumption. | 03-12-2009 |
20100165952 | ORTHOGONAL FREQUENCY AND CODE HOPPING MULTIPLEXING COMMUNICATIONS METHOD - An Orthogonal Frequency and Code Hopping Multiplexing (OFCHM) communication method based Orthogonal Frequency Division Multiplexing (OFDM) in a wireless communication system in which a plurality of communication channels are synchronized through a single medium. Six types of spreading and hopping methods are included, a method of controlling spreading and hopping depending on channel states, and a method of determining whether radio resources, consisting of subcarriers and orthogonal codewords, are allocated in a hopping manner according to the quality of service in the OFCHM communication method based OFDM. Furthermore, an embodiment employing six multiple array antennas is included. For this purpose, a method of combining a collision comparator and controller for monitoring the operations of a subcarrier group hopping pattern generator and an orthogonal code hopping pattern generator, a multiplexer and data symbol mapper, and the collision of hopping patterns that are composed of subcarriers and orthogonal codewords, and comparing data symbols to be transmitted to second communication stations to determine whether the data symbols collide in a symbol interval, a beam-forming processor for managing the operation of multiple array antennas, and a weighting vector controller is proposed. | 07-01-2010 |
20110045782 | DEVICES AND METHODS FOR TRANSMITTING AND RECEIVING DATA USING PRECODING MATRIX - A communication system to feed back an index of a precoding matrix is provided. A terminal may feed back an index of an optimal precoding matrix based on estimated channel status. A base station may transmit data to the terminal based on the index of the precoding matrix received from the terminal. | 02-24-2011 |
20110103503 | METHOD AND APPARATUS FOR CONTROLLING DYNAMIC CHANNEL FEEDBACK IN A MIMO NETWORK - A communication method and apparatus for coordinated multi-point (CoMP) transmission, is provided. Sizes of codebooks for a plurality of base stations may be adjusted based on a status of channels between a target terminal and a plurality of base stations. The terminal feeds back, to at least one of the plurality of base stations, channel direction information (CDI) including a number of bits of feedback. | 05-05-2011 |
20110124343 | COMMUNICATION SYSTEM OF DETECTING VICTIM TERMINAL AND PERFORMING INTERFERENCE COORDINATION IN MULTI-CELL ENVIRONMENTS - Provided is a method, and an apparatus and communication system to perform the method, of detecting a victim terminal and performing an interference coordination in a multi-cell environment. The multi-cell environment may include a heterogeneous cell environment including a small cell and a macro cell. The method includes determining whether a macro terminal is located within a cell coverage of a small base station, and adjusting the cell coverage according to the determination. | 05-26-2011 |
20110149921 | METHOD FOR ASSIGNING AND MANAGING REFERENCE SIGNALS IN A MULTI-CELL ENVIRONMENT, AND NETWORK DEVICE AND TERMINAL FOR APPLYING THE METHOD - A method of assigning and managing reference signals in a multi-cell environment, and a network device and a terminal for applying the method, are provided. Reference signal patterns may be assigned to multiple femtocells through a long term coordination of a central control unit that is used to control multiple cells. | 06-23-2011 |
20110159881 | Communication System Using Joint Leakage Suppression Scheme with Low Complexity - A communication method for at least one mobile station that includes a target mobile station that performs a Cooperative Multi-Point (CoMP) communication with at least two base stations, is provided. The communication method includes determining a beamforming vector used by the at least two base stations based on channel vectors and at least one channel matrix such that a signal-to-leakage-plus-noise-ratio (SLNR) for a target antenna from among antennas of a target mobile station is maximized. A Cholesky factorization may be used to determine an optimal beamforming vector with a low complexity. | 06-30-2011 |
20110177834 | COMMUNICATION APPARATUS AND PRECODING METHOD BASED ON MULTIPLE CELLS AND MULTIPLE USERS - Provided are a communication apparatus that may generate a precoding matrix including precoding vectors to cancel or align interference existing in a plurality of terminal devices based on location of the terminal devices, and a terminal device that may estimate a channel formed between the terminal device and the communication apparatus to cancel or align interference signals. | 07-21-2011 |
20110194632 | MULTIPLE INPUT MULTIPLE OUTPUT COMMUNICATION METHOD AND SYSTEM EXCHANGING COORDINATED RANK INFORMATION FOR NEIGHBOR CELL - Provided is a multiple input multiple output (MIMO) communication method and system that may exchange information associated with a coordinated rank for a neighbor cell. In a MIMO communication system, a target terminal may feed back the information associated with the coordinated rank to a serving base station, and the serving base station may exchange the information associated with the coordinated rank with the neighbor base station. The serving base station may perform precoding based on the exchanged information associated with the coordinated rank. | 08-11-2011 |
20110249633 | METHOD OF TRANSMITTING AND RECEIVING CONTROL INFORMATION BASED ON SPATIAL-MULTIPLEXING GAIN - A control information transmission and reception method based on a spatial-multiplexing gain, are provided. The control information may be transmitted by obtaining the spatial-multiplexing gain using an E-PDCCH region, and thus, a transmission efficiency of the control information may be improved. The common control information used for decoding the E-PDCCH may be transmitted via a PDCCH, and thus, a base station supporting both a general terminal and an enhanced terminal may effectively transmit the control information. Information associated with an indicator indicating whether the E-PDCCH is to be used during a subsequent resource allocation period may be transmitted, and thus, whether decoding with respect to the E-PDCCH is to be performed during the subsequent allocation period may be determined. | 10-13-2011 |
20120027108 | METHOD AND APPARATUS FOR COORDINATED MULTI-POINT COMMUNICATION FOR EACH SUB-BAND BASED ON LONG-TERM CHANNEL STATE INFORMATION - Provided is a coordinated communication method and apparatus that may perform coordinated communication based on long-term channel information, for each sub-band. Base stations may exchange scheduling information of each sub-band with each other to determine a priority among the base stations, and may perform rescheduling for each sub-band based on the determined priority. The base stations may obtain the long-term channel information, and thus may reduce overhead occurring with exchanging of information between a base station and a terminal or between base stations, and may decrease damage due to a delay of channel information associated with a terminal. | 02-02-2012 |
20120064904 | METHOD AND APPARATUS OF CONTROLLING RESOURCE OF FEMTO BASE STATION FOR PROTECTING INTERFERENCE VICTIM TERMINAL AND CONTROLLING INTERFERENCE AMONG FEMTO BASE STATIONS - A method and apparatus of controlling resources of a femto base station for protecting a macro terminal and controlling interference among femto base stations are provided. The femto base station or a gateway of the femto base station may allocate resource blocks of a femto cell based on a silencing resource block for protecting the macro terminal. Also, the femto base station or the gateway of the femto base station may allocate the resource block of the femto cell based on a relative location between the macro base station and the femto base station and a victim macro terminal. The femto base station or the gateway of the femto base station may allocate the resource block of the femto cell based on a resource block used by a neighboring femto base station. | 03-15-2012 |
20120077485 | METHOD AND APPARATUS FOR DETERMINING DOWNLINK BEAMFORMING VECTORS IN HIERARCHICAL CELL COMMUNICATION SYSTEM - Provided is a method and apparatus for determining a downlink beamforming vector in a hierarchical cell communication system. Small base stations may determine transmit beamforming vectors of the small base stations so that interference from the small base stations may be reduced in a macro terminal. A macro terminal and small terminals may determine receive beamforming vectors based on the transmit beamforming vectors of the small base stations. A macro base station may determine a transmit beamforming vector based on effective channels to terminals using the receive beamforming vectors of the terminals. | 03-29-2012 |
20130021967 | LOW POWER RADIO DEVICE AND RADIO RESOURCE SHARING METHOD FOR LOW POWER RADIO DEVICE - A low power radio device and a radio resource sharing method for the low power radio device are provided. In the low power radio device, a channel state (CS) is detected by carrier sensing before transmission of each frame to reduce interference and a need of retransmission of each frame, accordingly, reducing energy consumption. | 01-24-2013 |
20130077497 | COMMUNICATION DEVICE FOR DETECTING COLLISION IN OPERATING FREQUENCY BAND AND ANOTHER FREQUENCY BAND, AND COMMUNICATION METHOD THEREOF - A communication device for detecting a collision in an operating frequency band and another frequency band, and a communication method thereof. The communication method includes transmitting or receiving a packet using an operating frequency band. The communication method further includes detecting whether another communication device transmits another packet using another frequency band different from the operating frequency band while the transmitting or the receiving of the packet using the operating frequency band. The communication method further includes ceasing the transmitting or the receiving of the packet using the operating frequency band based on a result of the detection. | 03-28-2013 |
20130101013 | METHOD AND APPARATUS TO DETECT A SYMBOL IN RECEIVER INCLUDING MULTIPLE RECEIVING ANTENNAS - A receiver of a wireless communication system and method thereof include antennas configured to receive data, wherein the data comprises a preamble, a header, and a payload. The receiver also includes a synchronizer configured to perform time synchronization of the data received through corresponding paths of each antenna using corresponding preambles of the data. The receiver includes a header detector configured to detect a header from the data of each of the paths. A surviving path selector in the receiver is configured to select a signal of a surviving path from among the paths based on the header or the preamble. The receiver also includes combiner configured to combine the signal existing in the surviving path to demodulate the payload. | 04-25-2013 |
20130107988 | ULTRA-LOW POWER SUPER-REGENERATIVE RECEIVER AND METHOD THEREOF | 05-02-2013 |
20130170588 | ULTRA LOW POWER SUPER-REGENERATIVE RECEIVER AND METHOD THEREOF - An ultra low power super-regenerative receiver is provided. The ultra low power super-regenerative receiver includes a bit synchronizer configured to use a value sampled from a signal output from a super-regenerative oscillator to estimate a pulse-level position having a maximum amplitude value in a single period of a received symbol, a frame synchronizer configured to combine a plurality of pulse-level positions determined based on the estimated pulse-level position, and detect a predetermined bit sequence using the plurality of pulse-level positions combined, the frame synchronizer being configured to perform frame synchronization, and a data detector configured to detect data using the plurality of pulse-level positions determined after the frame synchronization is completed. | 07-04-2013 |
20130172042 | FIRST HUB AND SECOND HUB COMMUNICATING BY TEMPORAL CONNECTION BETWEEN DIFFERENT WIRELESS BODY AREA NETWORKS (WBANs) AND COMMUNICATION METHOD THEREOF - Provided are a first hub corresponding to a first WBAN and a second hub corresponding to a second WBAN which may communicate with each other through a temporal connection. The temporal connection may decrease the usage of additional data, complexity, and power consumption that typically occurs due to mutual communication between different WBANs. | 07-04-2013 |
20130181874 | COMMUNICATION SYSTEM - A wearable communication system including an antenna pattern configured to transmit or receive a radio-frequency (RF) signal, a main board configured to control the wearable communication system, and a power supply unit configured to supply power to the main board, wherein the antenna pattern is spaced apart from the main board and the power supply unit. | 07-18-2013 |
20130188653 | METHOD AND NODE FOR PREVENTING COLLISION BETWEEN NETWORKS COMMUNICATING BASED ON CSMA/CA - A method and a target node for preventing collisions between networks communicating based on a carrier sense multiple access/collision avoidance (CSMA/CA) scheme, are provided. The method includes synchronizing an object network with a neighboring network. The method further includes allocating, to the object network, a slot index based on a number of the networks, and a contention window (CW) size. The method further includes setting, for the object network, a back-off counter value based on the CW size. The method further includes reducing the back-off counter value based on a channel state of the object network, and the slot index. The method further includes transmitting data related to the neighboring network based on the back-off counter value. | 07-25-2013 |
20130252553 | ULTRA-LOW POWER WIRELESS COMMUNICATION APPARATUS AND METHOD - An ultra-low power wireless communication apparatus and an ultra-low power wireless communication method are provided. The ultra-low power wireless communication apparatus includes a sensing unit configured to sense state information of frequency channels in a frequency band. The ultra-low power wireless communication apparatus further includes a channel determining unit configured to divide the frequency band into frequency bands based on an allowable output power, assign a priority to one of the frequency bands that includes an output power that is less than or equal to the allowable output power, and determine a communication channel based on the state information of the frequency channels. | 09-26-2013 |
20130294389 | METHOD OF TRANSMITTING AND RECEIVING CONTROL INFORMATION BASED ON SPATIAL-MULTIPLEXING GAIN - A control information transmission and reception method based on a spatial-multiplexing gain, are provided. The control information may be transmitted by obtaining the spatial-multiplexing gain using an E-PDCCH region, and thus, a transmission efficiency of the control information may be improved. The common control information used for decoding the E-PDCCH may be transmitted via a PDCCH, and thus, a base station supporting both a general terminal and an enhanced terminal may effectively transmit the control information. Information associated with an indicator indicating whether the E-PDCCH is to be used during a subsequent resource allocation period may be transmitted, and thus, whether decoding with respect to the E-PDCCH is to be performed during the subsequent allocation period may be determined | 11-07-2013 |
20130314283 | APERTURE-COUPLED MICROSTRIP ANTENNA AND MANUFACTURING METHOD THEREOF - An aperture-coupled microstrip antenna and a manufacturing method thereof are provided. The aperture-coupled microstrip antenna includes a radiating patch including an aperture, and a ground plane disposed below the radiating patch. The aperture-coupled microstrip antenna further includes a shorting wall connecting the radiating patch with the ground plane, and a microstrip feeder configured to apply electromagnetic waves to the aperture. | 11-28-2013 |
20140017478 | PHOTOCHROMIC FILM AND MANUFACTURING METHOD THEREOF - The present invention relates to a photochromic film and a method of manufacturing the same. Since the photochromic composition according to the present invention is a non-solvent type composition and is capable of being used in a coating method, it is easy to control a thickness of a film, and the film can be manufactured to have a large area as compared to a coating method using a known solvent type composition or a casting method using a non-solvent type composition, thus providing the photochromic film having excellent durability and weather resistance. | 01-16-2014 |
20140029652 | LOW POWER COMMUNICATION DEVICE FOR SCHEDULING DATA SEGMENTS USING HOLD TIME OR LOCK TIME OF PHASE LOCKED LOOP - A device communicating with a node, includes a communication unit configured to transmit a transmitting data segment to the node, and receive a receiving data segment from the node. The device further includes a phase locked loop (PLL) configured to generate an operating frequency for the communication unit. The device further includes a PLL controller configured to control a hold time and a lock time, of the PLL, that are shared between the node and the device. The device further includes a scheduler configured to schedule the transmitting data segment and the receiving data segment based on the controlled hold time and lock time. | 01-30-2014 |
20140044222 | METHOD AND DEVICE FOR DETECTING RECEIVED SIGNAL USING MEDIAN ABSOLUTE DEVIATION - A method of detecting a received signal, includes determining correlation between a received signal in a predetermined signal interval and training symbols, and determining a median absolute deviation (MAD) of the received signal in a predetermined reference interval. The method further includes detecting a presence of the received signal based on the correlation and the MAD. | 02-13-2014 |
20140068116 | METHOD OF SELECTING AIR INTERFACE AT AMBIENT CONNECTIVITY AND HUB USING SAID METHOD - A method of selecting an interface by a hub, includes searching for a device of the hub, and setting an optimal interface to communicate with the device. The method further includes transmitting data to the device through the optimal interface. | 03-06-2014 |
20140077976 | MINIMUM ENERGY CODING METHOD AND APPARATUS FOR PERFORMING DIRECT CURRENT (DC) BALANCING IN BODY AREA NETWORK OR LOW POWER NETWORK - A minimum energy coding method and apparatus that includes obtaining groups of bits from a bitstream and finding a mapping rule between the groups of bits and codewords that is chosen to maintain a DC balance. For example, the bitstream may be a bitstream corresponding to a biosignal. | 03-20-2014 |
20140119477 | METHOD AND APPARATUS FOR JOINT PACKET DETECTION AND RADIO FREQUENCY (RF) PULSE SYNCHRONIZATION IN A SUPER-REGENERATIVE RECEIVER (SRR) - A method of increasing a performance of a super-regenerative receiver (SRR), includes initializing a quench rate to be greater than or equal to 2 based on a parameter, and comparing a decision metric to a lower threshold value, the decision metric established from a first receiver operating characteristic (ROC). The method further includes estimating a phase offset, using an over-quench method, and aligning quench signals at the quench rate of 1, and comparing the decision metric to a higher threshold value to minimize a false alarm probability. The method further includes confirming packet detection and the phase offset, using the over-quench method. | 05-01-2014 |
20140140252 | POWER REDUCTION METHOD FOR MULTI-PATH RECEIVER INCLUDING MULTI-RECEIVERS AND THE MULTI-PATH RECEIVER - A power reduction method for a multi-path receiver including multi-receivers, includes detecting a state of the multi-receivers, and controlling clock gating or power gating of the multi-receivers based on the state. | 05-22-2014 |
20140169513 | COMMUNICATION SYSTEM INCLUDING MULTIPLE RECEIVING ANTENNAS AND TIME TRACKING METHOD THEREOF - A tracking method and apparatus of a communication system to prevent a timing difference and bit error rate performance degradation caused by unstable characteristics of a plurality of circuit devices are provided. The tracking method and apparatus include sampling signals received at receiving antennas, tracking sample values resulting from the sampling of the signals, and combining the tracked sample values. | 06-19-2014 |
20140171002 | APPARATUS AND METHOD TO ADAPTIVELY SET THRESHOLD TO DETECT TRANSMISSION SYMBOL IN OOK RECEIVER - An apparatus and method are provided to adaptively set a threshold to detect a transmission symbol. The apparatus and method calculate detection parameters to determine the threshold to detect the transmission symbol based on probability distribution parameters, which determine a statistical probability distribution of an input signal. The apparatus and method adaptively detect a present transmission symbol using a previously detected transmission symbol and the detection parameters. | 06-19-2014 |
20140173387 | APPARATUS AND METHOD FOR DETECTING BIT SEQUENCE ROBUSTLY TO CHANGE OF DC OFFSET IN OOK RECEIVER - A method of detecting a bit sequence, includes estimating parameters to be used to determine a probability distribution of a present signal in each of states of a present time, and calculating metrics of the respective states based on the parameters. The method further includes selecting survivor states from the states based on the metrics, and detecting the bit sequence based on a path to each of the survivor states. | 06-19-2014 |
20140176390 | ANTENNA AND METHOD FOR MANUFACTURING ANTENNA - An antenna and a method of manufacturing the antenna are provided. The antenna may include an antenna surface, a ground plane, and an air layer comprising a porous structure. | 06-26-2014 |
20140369444 | TRANSMITTER, RECEIVER, AND WIRELESS COMMUNICATION METHOD THEREOF - A transmitter is configured to transmit a radio frequency (RF) signal to a receiver. The receiver is configured to receive the RF signal and decode data. Furthermore, a method of wireless communication is provided between the transmitter and the receiver, in which the transmitter transmits to the receiver the RF signal. A carrier phase of the RF signal is randomly converted. The receiver detects an envelope of the RF signal, and extracts data from the RF signal. | 12-18-2014 |
20150043682 | METHOD AND APPARATUS FOR DETERMINING THRESHOLD FOR SYMBOL DETECTION - A method of determining a threshold for symbol detection, includes receiving a most previously input sample value and a result of detecting a most previous symbol, and determining the threshold for the symbol detection of a currently input sample value based on the most previously input sample value and the result of detecting the most previous symbol. | 02-12-2015 |