45th week of 2008 patent applcation highlights part 24 |
Patent application number | Title | Published |
20080273522 | GENERATION AND DETECTION OF SYNCHRONIZATION SIGNAL IN A WIRELESS COMMUNICATION SYSTEM - Techniques for generating a synchronization signal (e.g., a secondary synchronization signal) based on an M-sequence are described. In one design, first and second sequences for a secondary synchronization signal may be generated based on different cyclic shifts of the M-sequence. The cyclic shifts may be determined based on cell ID and/or other information to send in the secondary synchronization signal. An output sequence may be generated based on the first and second sequences, e.g., by combining the first and second sequences and scrambling the combined first and second sequences with at least one scrambling sequence. The secondary synchronization signal may then be generated based on the output sequence, e.g., by mapping samples in the output sequence to subcarriers and generating an OFDM symbol with the mapped samples. Detection for the secondary synchronization signal may be efficiently performed using fast M-sequence transform (FMT). | 2008-11-06 |
20080273523 | Providing Service Information For Charging A Subscriber For A Service - Providing service information includes receiving session initiation protocol (SIP) packets from a SIP proxy. Service information is extracted from the SIP packets. The service information describes a service provided to an access terminal associated with a subscriber. The service information is sent to a charging/enforcement point operable to charge the subscriber for the service. | 2008-11-06 |
20080273524 | SPLIT AND SEQUENTIAL PAGING FOR VOICE CALL CONTINUITY - Systems and methodologies are described that facilitate paging for establishing a Voice Call Continuity (VCC)-supported voice call in a network containing access point(s) that can support packet switched (PS) voice communication, such as Voice over Internet Protocol (VoIP), and access point(s) that can support only circuit switched (CS) voice communication. Paging signals as described herein are selectively delivered, such that a desired terminal receives a single PS paging signal if located at a VoIP-capable access point and a single CS paging signal otherwise. A split paging technique is described herein, wherein PS paging signals are delivered to VoIP-capable access points and CS paging signals are delivered to non-VoIP-capable access points substantially simultaneously. Additionally, a sequential paging technique is described herein, wherein PS paging signals are delivered to VoIP-capable access points and, if no response is received from a desired terminal, CS-domain paging is conducted. | 2008-11-06 |
20080273525 | COMMUNICATION METHOD AND COMMUNICATION DEVICE AS WELL AS COMPUTER PROGRAM - Communication performed within a network including a plurality of communication stations is provided, in which when an access control is performed so that communication timing of a packet can not collide with that of another station by detecting a signal which is transmitted from another station, “a header area processed not to become easily an error such as a physical layer header portion of a packet” which is transmitted from a communication station is made to have at least information which is required for extracting information in a payload of the packet and a field for controlling an access reservation of transmission of a packet which is generated as a result of transmission of another packet so that processing using the field can be performed. | 2008-11-06 |
20080273526 | Method and system of supporting abbreviated dialing between affiliated phones wherein at least one phone is associated with a non-affiliated network - A method and system of supporting abbreviated dialing between phones include determining dialing by a first phone of an abbreviated number associated with a second phone. The first phone is in a circuit-switched network associated with a Centrex system and the second phone is in an Internet Protocol (IP) packet-switched network disassociated from the Centrex system. The phones in the circuit-switched network are associated with the Centrex system. The Centrex system supports abbreviated dialing between phones associated with the Centrex system. A routing number for a phone call from the first phone to the second phone is determined as a function of the abbreviated number. The routing number includes IP addressing sufficient to support routing of the phone call through the packet-switched network to the second phone such as if both phones were associated with the Centrex system. | 2008-11-06 |
20080273527 | Distributed system - A distributed system comprises a master node, at least one slave node, and two or more communication channels linking the master node to the at least one slave node. The master node is configured for transmitting the same message to the at least one slave node over each of the two or more communication channels, with a pre-determined delay between each channel transmission. In some embodiments, the system may also include a clock synchronization means configured such that the operation of each slave node is synchronized with the master node and/or a different slave node, irrespective of which channel transmission the slave node receives. | 2008-11-06 |
20080273528 | PHASE SELECT CIRCUIT WITH REDUCED HYSTERESIS EFFECT - A phase signal select circuit includes a supporting path coupled to a tri-state inverter circuit. The supporting path reduces effects of hysteresis on signal transfer. An apparatus includes at least one input node responsive to a respective one of at least one input signal. The apparatus includes at least one circuit coupled to a respective one of the at least one input node and coupled to an output node. Individual ones of the at least one circuit are configured to provide a version of the respective input signal to the output node in response to a first state of a respective select signal. The apparatus includes at least one second circuit coupled to a respective one of the at least one circuit. The at least one second circuit is configured to toggle nodes of the at least one circuit in response to a second state of the respective select signal. | 2008-11-06 |
20080273529 | Method for the Optimized Transmission of Data Bursts Between a Sending and a Receiving Network Node - The invention relates to an optical data burst transmission method. An emitted network node obtains, together with a confirmation signal, information regarding the length of time of after which blocking no longer occurs and/or information indicating when the connection path is free. The emitted network node can be immediately emitted after an actual emitted data burst, another data burst and after other bursts. As a result, waiting time between the bursts is prevented and the available transmission capacity is used in an optimal manner. The probability of blocking is also reduced as is the necessary signaling information. | 2008-11-06 |
20080273530 | TRANSMISSION OF DIGITAL INFORMATION IN A FRAME SWITCHED DATA NETWORK - The invention relates to transmitting digital information between the network elements of a frame switched data network. In the present invention, it has surprisingly been discovered that the padding bits of the data field of a minimum sized Ethernet frame can be used for transmitting digital information between the elements of a data network. In that case the frame data field (109) of a minimum sized Ethernet frame contains an information unit (DIU), the size of which in bytes is smaller than the minimum size of a frame data field, as well as other digital information (DI) that is written in an area (107) of the frame data field that corresponds to the padding bits. The invention makes it possible to also utilize the data transmission capacity needed for transmitting the padding bits. | 2008-11-06 |
20080273531 | DATA SWITCH AND A METHOD OF SWITCHING - The present invention relates to a switch and a method of switching for switching data frames. The switch comprises plural input ports and plural output ports; a central switch fabric configurable in any switching cycle to make connections between required pairs of the input ports and output ports; one or more transmit devices configured to receive data from the input ports and transmit data cells across the switch fabric; a controller for controlling the operation of the transmit devices, the plural input ports and output ports and the switch fabric; and multicast storage associated with the or each of the transmit devices for storage of fragmenting multicast cells and onward transmission of the fragmented cells. | 2008-11-06 |
20080273532 | Direct Assembly Of A Data Payload In An Application Memory - A system and method for direct assembly of data payload in an application memory. A transmission control protocol offloading process is applied by network interface card components on a packet header to provide a direct memory access (DMA) task with precise application memory location pointers to a DMA engine. The DMA engine uses the DMA task to place the data payload directly in the application memory. | 2008-11-06 |
20080273533 | Adaptive Packet Transmission with Explicit Deadline Adjustment - The embodiments of the invention relate to source content streaming, particularly to transmitting data units scheduled for dropping or non-transmission. This data unit in the buffer scheduled for dropping is instead transmitted by dropping one or more consecutive data units later in the transmission order in the buffer and which meet a lower priority threshold. In some embodiments, the data unit is transmitted with a modified time value, e.g., a modified timestamp and/or an allowable presentation time range value. | 2008-11-06 |
20080273534 | Signaling Completion of a Message Transfer from an Origin Compute Node to a Target Compute Node - Signaling completion of a message transfer from an origin node to a target node includes: sending, by an origin DMA engine, an RTS message, the RTS message specifying an application message for transfer to the target node from the origin node; receiving, by the origin DMA engine, a remote get message containing a data descriptor for the message and a completion notification descriptor, the completion notification descriptor specifying a local memory FIFO data transfer operation for transferring data locally on the origin node; inserting, by the origin DMA engine in an injection FIFO buffer, the data descriptor followed by the completion notification descriptor; transferring, by the origin DMA engine to the target node, the message in dependence upon the data descriptor; and notifying, by the origin DMA engine, the application that transfer of the message is complete in dependence upon the completion notification descriptor. | 2008-11-06 |
20080273535 | METHOD AND APPARATUS FOR ASSIGNING A VIRTUAL ADDRESS TO AND TEXT-MESSAGING TO MULTIPLE TEXT-CAPABLE DESTINATION ENTITIES - A virtual address is configured. A destination address and a capability information associated with each destination entity of a set of destination entities associated with a destination party are configured. Each destination entity from the set of destination entities is a push-capable, text-message-capable entity. Each destination entity from the set of destination entities is associated with a virtual address. The virtual address defines a destination remote from the destination party and remote from premises associated with the destination party. | 2008-11-06 |
20080273536 | EARLY DETECTION OF FALSE START-OF-PACKET TRIGGERS IN A WIRELESS NETWORK NODE - An apparatus, a carrier medium storing instructions to implement a method, and a method in a node of a wireless network able to receive packets that exactly or substantially conform to a wireless network standard according to which each packet includes a header having bits that have respective correct values in the case that the packet exactly conforms to the standard. The method includes receiving a start-of-packet (SOP) trigger that indicates that a packet may have been received, checking one or more bits in the header to determine whether or not they have their respective correct values, and continuing to process the packet in the case that the checking indicates that the checked bits have their respective correct values. In one implementation, the header includes a first field modulated at a known rate that has one or more reserved bit locations, and a second field modulated at a data rate indicated in the first field. In such an implementation, the checking includes processing the first field and checking one or more bits in the first field to determine whether or not they have their respective correct values, and, if the checked bits of the first field have their respective correct values, checking the second field for integrity. | 2008-11-06 |
20080273537 | CIPHERING SEQUENCE NUMBER FOR AN ADJACENT LAYER PROTOCOL IN DATA PACKET COMMUNICATIONS - A data packet communication system employs data encryption in a packet data convergence protocol (PDCP) and radio link control (RLC) in Layer 2 of transmission between a transmitter (TX) and a receiver (RX). A single sequence number is used for both the PDCP and RLC to reduce overhead by signaling a TX PDCP first ciphering sequence number to the RX prior to encrypted data packet communication. A sequence number accompanies each RLC PDU, which can encompass concatenated or segmented service data units (SDUs) from the higher layer PDCP. This sequence number is sufficient for the RLC to perform re-ordering, gap detection, retransmission, etc., while also allowing the RX upper layer PDCP to reconstruct a sequenced value used to encrypt content. | 2008-11-06 |
20080273538 | Multi-disk optical drive - An apparatus for transitioning data contained on multiple memory storage devices, such as optical disks and memory cards, efficiently onto a data network by utilizing data bridges between the memory devices and the target network. | 2008-11-06 |
20080273539 | SYSTEM FOR PERFORMING A PACKET HEADER LOOKUP - A system for performing a lookup for a packet in a computer network are disclosed. The packet includes a header. The system includes a parser, a lookup engine coupled with the parser, and a processor coupled with the lookup engine. The parser parses the packet for the header prior to receipt of the packet being completed. The lookup engine performs a lookup for the header and returns a resultant. In one aspect, the lookup includes performing a local lookup of a cache that includes resultants of previous lookups. The processor processes the resultant. | 2008-11-06 |
20080273540 | System and method for rendezvous in a communications network - The present invention introduces the notions of a rendezvous component and rendezvous functionality into the communications network environment. Using the invention, an application can express information regarding when an operation requested of a device should complete and at which location, and it enables the device to perform its operations respecting this information while also improving the device's overall behavior. In an embodiment, one or more data objects are distributed across one or more collections of storage devices using a dispersal technique. When access to a data object is desired, a rendezvous component issues a set of constituent requests to the collections of storage devices. These requests typically include location and timing rendezvous parameters specifying a destination location where and a given time when a given data object is to be reconstituted. The data object is then reconstituted at the destination location and at the given time, while respecting a given characteristic of a storage device access model. In this embodiment, the collection of storage devices may comprise disk devices, and the requests are issued by a given application, such as a media server. | 2008-11-06 |
20080273541 | Linked-list hybrid peer-to-peer system and method for optimizing throughput speed and preventing data starvation - According to one embodiment, a system and method is described for formulating a linked-list hybrid peer-to-peer sub-network that analyzes capabilities of a plurality of nodes, and creating at least two linked-list hybrid peer-to-peer sub-networks by forming a first group of nodes of the plurality of nodes having similar capabilities and establishing serial connections between nodes of the first group of nodes to form a first linked-list hybrid peer-to-peer sub-network. | 2008-11-06 |
20080273542 | Communication Apparatus - A communication apparatus according to the invention can be applied to constitute each of relay nodes provided to constitute a novel communication network which avoids electric wave collision arising on a communication channel without carrying out “carrier sense” or operations for transmitting and receiving control information, such as “RTS”, “CTS”, and so no. The communication apparatus comprises a temporary managing portion | 2008-11-06 |
20080273543 | Signaling Completion of a Message Transfer from an Origin Compute Node to a Target Compute Node - Signaling completion of a message transfer from an origin node to a target node includes: sending, by an origin DMA engine, an RTS message, the RTS message specifying an application message for transfer to the target node from the origin node; receiving, by the origin DMA engine, a remote get message containing a data descriptor for the message and a completion notification descriptor, the completion notification descriptor specifying a local direct put transfer operation for transferring data locally on the origin node; inserting, by the origin DMA engine in an injection FIFO buffer, the data descriptor followed by the completion notification descriptor; transferring, by the origin DMA engine to the target node, the message in dependence upon the data descriptor; and notifying, by the origin DMA engine, the application that transfer of the message is complete in dependence upon the completion notification descriptor. | 2008-11-06 |
20080273544 | MANAGEMENT OF PROTOCOL INFORMATION IN PNNI HIERARCHICAL NETWORKS - Described is a method for managing flow of protocol information in a node of a hierarchical network in which the protocol information is communicated between network nodes in topology state elements. The method comprises checking topology state elements generated by the node to identify protocol information encapsulated therein, and selectively allowing transmittal of the topology state elements from the node to lower levels of the network based on the protocol information identified. | 2008-11-06 |
20080273545 | Channel service manager with priority queuing - A system and method are provided for prioritizing network processor information flow in a channel service manager (CSM). The method receives a plurality of information streams on a plurality of input channels, and selectively links input channels to CSM channels. The information streams are stored, and the stored the information streams are mapped to a processor queue in a group of processor queues. Information streams are supplied from the group of processor queues to a network processor in an order responsive to a ranking of the processor queues inside the group. More explicitly, selectively linking input channels to CSM channels includes creating a fixed linkage between each input port and an arbiter in a group of arbiters, and scheduling information streams in response to the ranking of the arbiter inside the group. Finally, a CSM channel is selected for each information stream scheduled by an arbiter. | 2008-11-06 |
20080273546 | DATA SWITCH AND A METHOD OF SWITCHING - The invention relates to a data switch, comprising: plural input ports each for receiving data cells from a respective link; plural output ports each for providing data cells to a respective link; a switch fabric for selectively enabling a data cell received at one of the plural input ports to be switched to one or more of the plural output ports; and a switch scheduler comprising a cut-through arbiter arranged to schedule the switching of a received data cell before the entirety of the data cell is received. | 2008-11-06 |
20080273547 | Apparatus and method for acknowledging successful transmissions in a wireless communication system - An initiating device in a wireless network transmits a data message to at least three responding devices. None, one, some, or all of the responding devices may successfully receive the data message. Any responding device that successfully receives the data message sends an acknowledgement to the initiating device, which may or may not receive the acknowledgement. The responding devices may use any suitable technique to determine an order in which the acknowledgements are communicated to the initiating device, such as by using an ordering of the network addresses of the responding devices. With adequate spatial and angular separation of the responding devices from the perspective of the initiating device, the likelihood of a lost (unsuccessfully received) data message in the wireless network can be reduced significantly. This may be useful, for example, in industrial process control systems used to control industrial processes. | 2008-11-06 |
20080273548 | CONFIGURATION OF SERVICE GROUPS IN A CABLE NETWORK - A method and apparatus for configuring service groups in a cable network is provided. A method may comprise identifying a primary downstream channel in a cable network and identifying a plurality of fiber nodes fed by the primary downstream channel. For each fiber node identified, the method may comprise identifying a set of downstream channels communicating with the fiber node. If duplicate sets are identified, duplicate sets of downstream channels may be eliminated and a downstream service group may be associated with each of the remaining sets of downstream channels. In an example embodiment, at least one Media Access Control (MAC) domain is automatically selected to correspond to the identified service groups. | 2008-11-06 |
20080273549 | Method of Operating a Network Node of a Network, a Network Node, a Network System, a Computer-Readable Medium, and a Program Element - A method of operating a network node of a network, a network node, a network system, a computer-readable medium, and a program element A method ( | 2008-11-06 |
20080273550 | Auto-Detecting and Auto-Correcting System State Changes Before Booting Into Operating Systems - A mechanism via which system state changes can be detected and corrected automatically prior to a customer initiated boot. The mechanism is extensible to address newly added or discovered system state changes that result in a locked condition. The mechanism detects and corrects adverse events before booting into the operating system. | 2008-11-06 |
20080273551 | Method and Related Apparatus for Handling Packet Discard in a Wireless Communications System - A method for handling packet discard in a transmitter of a wireless communications system includes activating a “use of a special value of a header extension field” mode, discarding a plurality of service data units, wherein the last service data unit of the plurality of service data units ends at an end of a first protocol data unit using the special value in a header extension field, and setting a value of a field to be a sequence number of a second protocol data unit, wherein the field is utilized for indicating a receiver to discard all not yet successfully received service data units that have segments with sequence number being less than the value of the field, and the second protocol data unit is next to the first protocol data unit. | 2008-11-06 |
20080273552 | METHODS AND APPARATUSES FOR MULTIMODE BLUETOOTH AND WLAN OPERATION CONCURRENTLY - A wideband telecommunications device with narrow band support. The device may be a receiver having a wireless interface configured to receive combined first and second signals, the first signal having data in a first frequency band and the second signal having data in a second frequency band wider than the first frequency band, wherein the first frequency band is within the second frequency band. The receiver may also be a processing system configured to recover the data in the first signal from the combined first and second signals. The device may be a transmitter having a first signal source configured to provide a first signal having data in a first frequency band; a second signal source having a second frequency band, the first frequency band being within a sub-band of the second frequency band, wherein the second signal source is configured to provide a second signal having data in the second frequency band with no data in the sub-band of the second frequency band, a processing system configured to combine the first and second signals, and a wireless interface configured to transmit the combined first and second signal. | 2008-11-06 |
20080273553 | Method And System For Bandwidth Control, Apparatus For Access Control And Apparatus For User Profile Management - A bandwidth control method includes: determining a service type of a service ordered by a user, allocating maximum usable bandwidth to the service type and setting up a bandwidth control policy for the service type; calculating bandwidth occupied by the service type when the user uses the service; and adjusting, according to the bandwidth control policy, the bandwidth occupied by the service type if the bandwidth occupied by the service type is higher than the maximum usable bandwidth allocated to the service type. | 2008-11-06 |
20080273554 | System and method for time-constrained transmission of video in a communication system - A retransmission method and system for time-constrained video packet transmission between a sender and a receiver, wherein the retransmission deadline of each packet is individually adjusted based on the actual decoding time deadline at the receiver decoder. Accordingly, variable retransmission deadlines are set corresponding to the decoding and playback time for each data packet which carries compressed video information. As such, both network efficiency and video transmission quality are improved compared to the conventional retransmission approaches. | 2008-11-06 |
20080273555 | COMMUNICATIONS SYSTEM USING ADAPTIVE BASEBAND INJECTED PILOT CARRIER SYMBOLS AND RELATED METHOD - A system, method and apparatus includes a transmitter that has an encoder and baseband modulator that encodes and modulates a sequence of payload data symbols as a signal constellation to be communicated. An amble generator and baseband modulator generates amble symbols as a known sequence of M symbol times in length every N symbol times. A multiplexer multiplexes the data and amble symbols together to form a communications signal that is transmitted over a communications channel. | 2008-11-06 |
20080273556 | SEMICONDUCTOR LIGHT-EMITTING DEVICE - A semiconductor light-emitting device includes a light generation unit generating light with an oscillation wavelength λ, a light outgoing facet from which light generated at the light generation unit emerges, a light reflecting facet at which light generated at the light generation unit is reflected, and a high reflection film at the light reflecting facet and made of a dielectric multilayered film of at least three layers. The high reflection film includes a first layer which is in contact with the light reflection facet, is constituted of Al | 2008-11-06 |
20080273557 | Illumination system for optical modulators - A phase plate and lens modify light beams emitted by an array of lasers to form an efficient illumination source for a MEMS light modulator array. The phase of the electric field emitted by the lasers is modified such that the after passing through a lens the beam profile at the lens focal plane has an approximately rectangular shape appropriate for illuminating a light modulator array. The phase plate may be constructed from a glass plate with rectangular notches etched in it or with rectangular ridges formed on it. Furthermore a light source, such as a laser, may be coupled to an adiabatically tapered optical waveguide in which a phase adjusting block is introduced in analogy to notches in a bulk phase plate. Phase modified light beams output from the waveguide system have similar focusing properties to those passing through a bulk phase plate. | 2008-11-06 |
20080273558 | High Power Fiber Chirped Pulse Amplification System Utilizing Telecom-Type Components - An erbium fiber (or erbium-ytterbium) based chirped pulse amplification system is illustrated. The use of fiber amplifiers operating in the telecommunications window enables the implementation of telecommunications components and telecommunications compatible assembly procedures with superior mechanical stability. | 2008-11-06 |
20080273559 | Multiple Output Repetitively Pulsed Laser - A continuously pumped, mode-locked laser is disclosed, which includes a cavity dumper that can remove a constant fraction of the light from the cavity at every 1/f period of time, independent of the time at which the first pulse in a train is initiated. The cavity dumper includes a modulator and two output arms, denoted as a primary output arm and a secondary output arm. When a user desires a train of pulses, the pulses are directed to the primary output arm. Between trains of pulses, when no pulse is desired by the user, the pulses are directed to the secondary output arm, which terminates in an absorber or at a secondary optical system. In this manner, the energy contained in each output pulse is essentially constant, from pulse-to-pulse and from train-to-train. This may overcome the disadvantage of many lasers that have a single output arm, in which the first pulse in a train may have an energy that depends on the length of the inactive period that immediately precedes the train. | 2008-11-06 |
20080273560 | Method and Apparatus for Optical Mode Multiplexing of Multimode Lasers and Arrays - According to methods and apparatus described herein, multimode laser source capable of emitting a diffraction-limited beam of various shapes (including single-lobe shape) can be realized. An optical apparatus for generating a such diffraction-limited beam comprises a spatial phase modulator for spatially modulating a spectrally dispersed optical signal emitted from a semiconductor laser into a combined-mode optical signal, wherein the lateral modes of the optical signal from the laser are combined into a diffraction-limited beam. Also, a coupling optical system is provided for wavelength-demultiplexing the multimode optical signal before the multimode optical signal is spatially modulated by the spatial phase modulator, and also for wavelength-multiplexing the combined-mode optical signal. | 2008-11-06 |
20080273561 | Method for Forming Anti-Reflective Coating - A system and method of minimizing the amount of power that is used by an optoelectronic module is disclosed. The system uses a thermoelectric cooler (TEC) to maintain a case temperature of the module at about 50° C. This allows the TEC to operate in the much more efficient heating mode, thus minimizing the amount of current being used to maintain the module temperature. The method includes the steps of determining a temperature range and operating temperature for an optoelectronic module, such that a maximum current level is not exceeded. In one exemplary embodiment, an operating temperature of about 50° C. with a temperature range of from about −5° C. to about 75° C. allows a maximum current of about 300 mA. | 2008-11-06 |
20080273562 | Nitride Semiconductor Device and Method for Fabricating the Same - A nitride semiconductor device | 2008-11-06 |
20080273563 | High Power Semiconductor Laser Diode - Semiconductor laser diodes, particularly high power AlGaAs-based ridge-waveguide laser diodes, are often used in opto-electronics as so-called pump lasers for fiber amplifiers in optical communication lines. To provide the desired high power output and stability of such a laser diode and avoid degradation during use, the present invention concerns an improved design of such a device, the improvement in particular significantly minimizing or avoiding (front) end section degradation of such a laser diode and significantly increasing long-term stability. This is achieved by separating the waveguide ridge into an active main ridge section ( | 2008-11-06 |
20080273564 | Semiconductor Laser Element and Semiconductor Laser Element Array - A semiconductor laser device | 2008-11-06 |
20080273565 | EXCITED STATE QUANTUM CASCADE PHOTON SOURCE - A quantum cascade source, such as a QC laser, is provided comprising a plurality of repeat units each including an active region and an injector region. The active region includes at least two quantum wells that, in response to an applied electrical bias, provide a first, second, and third electron energy level, each resulting from a respective quantum well excited state. The first and second energy levels are configured so that an electron transition from the first energy level to the second energy level emits a photon of a selected wavelength. The second and third energy levels are configured so that an electron transition from the second energy level to the third energy level comprises a nonradiative transition to empty the second energy level sufficiently quickly to promote a population inversion between the first and second energy levels. | 2008-11-06 |
20080273566 | SEMICONDUCTOR LIGHT-EMITTING ELEMENT, METHOD OF PRODUCING SEMICONDUCTOR LIGHT-EMITTING ELEMENT, BACKLIGHT, DISPLAY UNIT, ELECTRONIC DEVICE, AND LIGHT-EMITTING UNIT - A semiconductor light-emitting element includes a nitride-based Group III-V compound semiconductor, wherein the semiconductor light-emitting element has a structure in which an active layer including one or a plurality of well layers is sandwiched between a p-side cladding layer and an n-side cladding layer, and the composition of at least one of the well layers of the active layer is modulated in the direction perpendicular to the thickness direction of the least one of the well layers. | 2008-11-06 |
20080273567 | HYBRID WAVEGUIDE SYSTEMS AND RELATED METHODS - A III-V semiconductor waveguide is coupled with a Si waveguide to form a hybrid structure. Spatial location of the optical mode (or supermode) of the hybrid structure is controlled by controlling at least one between the geometry and the refractive index of the structure, e.g., varying width of the Si waveguide. Control of such spatial location allows location of the optical mode either almost entirely in the III-V semiconductor waveguide or almost entirely in the Si waveguide, thus allowing various optical arrangements to be obtained according to the location of the optical mode and the proprieties of the waveguides. For example, if the III-V semiconductor waveguide is amplifying and is provided with a highly reflective mirror at one end, the Si waveguide is provided with a partially reflective mirror at the other end, the optical mode is almost entirely located in the gain region of the III-V semiconductor waveguide, and is also almost entirely located in the coupling region of the Si waveguide, a resonator for laser oscillation is obtained. | 2008-11-06 |
20080273568 | Beam combiner for a multicolor laser display - A beam combiner is specified for a multicolor laser display having an optical light source ( | 2008-11-06 |
20080273569 | SURFACE-EMITTING LASER DEVICE - A VCSEL device includes a polyimide having a larger thickness (d | 2008-11-06 |
20080273570 | Optically Pumped Waveguide Laser With a Tapered Waveguide Section - The present invention relates to an optically pumped waveguide laser ( | 2008-11-06 |
20080273571 | Differential passive calorimeter - A passive differential calorimeter, comprising an inflow control valve ( | 2008-11-06 |
20080273572 | THERMAL DETECTOR FOR CHEMICAL OR BIOLOGICAL AGENTS - A detector has a thermoelectric sensor and a reactive layer. The thermoelectric sensor is configured to sense heat and to provide an electrical signal based on the sensed heat. The reactive layer is coupled to the thermoelectric sensor and is reactive with an airborne chemical or airborne biological agent of interest. The reaction is exothermic or endothermic. When the airborne agent of interest reacts with the reactive layer, the reaction is detected by the thermoelectric sensor. The electrical signal provides an indication based on the reaction. | 2008-11-06 |
20080273573 | DETECTION DEVICE AND PROCESS FOR DETECTING A TEMPERATURE OF AN OBJECT - A detection device is provided for detecting a temperature of an object, especially of a living being. The detection device may be connected to at least one temperature sensor and is designed to send a current for detecting the temperature to the temperature sensor and to receive at least one temperature signal, which represents a temperature of the temperature sensor. The detection device is designed to generate a temperature signal, which represents the temperature of the object, as a function of the temperature signal of the temperature sensor, and to send same on the output side. The detection device is designed to generate a heating current and to send the heating current to the temperature sensor during a heating time period, so that a total current, comprising the current for detecting the temperature and the heating current, is greater than the current for detecting the temperature, and thus to heat the temperature sensor. | 2008-11-06 |
20080273574 | SPREAD SPECTRUM CLOCK SIGNAL GENERATION SYSTEM AND METHOD - A system and method for generating a clock signal having spread spectrum modulation. The method involves generating a clock signal by generating edge positions for edges of the clock signal from a digital representation of a timing for each edge to impart spread spectrum modulation to the clock signal. A programmable modulator is provided that generates digital values representing edge positions for edges of a clock signal based on at least one of a time-varying period value and a time-varying duty-cycle value. The programmable modulator may comprise a first circuit, called a period modulation circuit, that generates a time-varying digital period value, and a second circuit, called a duty-cycle modulation circuit, that generates a time-varying digital duty-cycle value. The time-varying period values and time-varying duty cycle values are processed to produce a digital edge position value that specifies an edge position for a clock signal. The programmable modulator is coupled to an arbitrary waveform synthesizer that generates timing for edges of the clock signal based on the edge position values. A variety of modulations can be imposed on the clock signal using these techniques, including triangle wave modulation, near-triangle modulation, random and pseudo-random modulation. | 2008-11-06 |
20080273575 | Method and apparatus for cooperative coexistence between wireless communication protocols - A method and apparatus of reducing interference between subsystems implementing wireless communication protocols is disclosed. The method comprises reducing interference in a first subsystem implementing a first wireless communication protocol operating in a first frequency band caused by a second subsystem implementing a second wireless communication protocol operating in a second frequency band, the second wireless communication protocol employing Adaptive Frequency Hopping (AFH), the method comprising calculating one or more frequencies to be avoided by the second subsystem on the basis of one or more frequencies in use by the first subsystem. | 2008-11-06 |
20080273576 | RADIO TRANSMISSION APPARATUS, RADIO RECEPTION APPARATUS, TRANSCEIVER, AND RADIO COMMUNICATION METHOD - A radio transmission apparatus that uses a plurality of band groups and that transmits a signal subjected to frequency hopping between a plurality of bands in each band group at a local frequency apart from the center frequency of each band includes a local frequency generating unit that generates a local frequency lower than the center frequency of each band in a first band group in the transmission with the first band group. The local frequency generating unit generates a local frequency higher than the center frequency of each band in a second band group in the transmission with the second band group, the local frequency to be generated being the same as the local frequency generated in the transmission with the first band group. | 2008-11-06 |
20080273577 | Method and apparatus for non-cooperative coexistence between wireless communication protocols - A method and apparatus of reducing interference between wireless communication protocols is disclosed. The method comprises reducing interference between a first wireless communication protocol operating in a first frequency band and a second wireless communication protocol operating in a second frequency band by generating noise to cause interference with one or more frequencies in the second frequency band and performing Adaptive Frequency Hopping (AFH) in the second wireless communication protocol to avoid the one or more frequencies in the second frequency band in which interference is caused by the noise. | 2008-11-06 |
20080273578 | GNSS RECEIVER WITH CROSS-CORRELATION REJECTION - Radiolocalization receiver having a plurality of correlation taps, and including a module of cross-correlation detection in which spurious correlation terms are detected by statistical analysis of the frequencies of the candidate peaks. The system can restrict further integration to those taps whose frequency is outside the cross-interference signal, or trigger new acquisition of different space vehicles, upon detection of a cross-interference situation. | 2008-11-06 |
20080273579 | Programmable antenna assembly and applications thereof - A programmable antenna assembly includes a configurable antenna structure, a configurable antenna interface, and a control module. The configurable antenna structure includes a plurality of antenna elements that, in response to an antenna configuration signal, are configured elements into at least one antenna. The configurable antenna interface module is coupled to the at least one antenna and, based on an antenna interface control signal, provides at least one of an impedance matching circuit and a bandpass filter. The control module is coupled to generate the antenna configuration signal and the antenna interface control signal in accordance with a first frequency band and a second frequency band such that the at least one antenna facilitates at least one of transmitting and receiving a first RF signal within the first frequency band and facilitates at least one of transmitting and receiving a second RF signal within the second frequency band. | 2008-11-06 |
20080273580 | DYNAMIC ALLOCATION OF CYCLIC EXTENSION IN ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEMS - Briefly, in accordance with one embodiment of the invention, an orthogonal frequency division multiplexing system may provide a dynamically calculated cyclic extension, the length of which may be based at least in part on a delay spread due to an experienced environmental condition. The length of the cyclic extension may be calculated by determining a channel impulse response, and then computing the energy distribution of the channel impulse response. The length of the cyclic extension may then be set according to the energy distribution of the channel impulse response. | 2008-11-06 |
20080273581 | COMMUNICATION APPARATUS AND COMMUNICATION METHOD USING DIGITAL WAVELET MULTI CARRIER TRANSMISSION SYSTEM - In case of disposing a pilot symbol in data transmission which depends on a DWMC transmission system, in a plurality of transmission symbols on a time axis, a pilot symbol, which becomes a signal of a sine wave, is configured, by giving contiguous identical data in a plurality of predetermined symbols. By transmitting a transmission signal with the use of this pilot signal, between a transmitting device and a receiving device, it is possible to carry out channel equalization by complex information which is obtained from a pilot symbol. | 2008-11-06 |
20080273582 | SELECTION OF ACQUISITION SEQUENCES FOR OPTIMAL FREQUENCY OFFSET ESTIMATION - Systems and methods are provided to generate a set of synchronization channel sequences that optimize time and frequency acquisition. A set of root indices of Zadoff-Chu sequences in a first domain (e.g., time domain) that optimize a performance metric or merit factor are identified. An optimal index is determined that also optimizes a performance metric in a reciprocal domain (e.g., frequency domain). Optimal indices satisfy a centro-symmetric relationship with respect to a half-value of sequence length: When 1 is an optimal index, N−1 is also an optimal root index. For sequences of length Q | 2008-11-06 |
20080273583 | CHANNEL ESTIMATION FOR OFDM-BASED WIRELESS COMMUNICATION SYSTEM USING SPARSELY SPACED PILOT SUBCARRIERS - A device and method for performing a channel estimation for an OFDM-based wireless communication system using sparsely spaced pilot subcarriers estimates missing pilot subcarriers in an interpolation window using pilot subcarriers that are outside of the interpolation window to produce estimated pilot subcarriers for the interpolation window. The pilot subcarriers in the interpolation window and the estimated pilot subcarrier are used to compute pilot channel estimates for the interpolation window, which are then used to derive data channel estimates for the interpolation window. | 2008-11-06 |
20080273584 | Generating test sequences for circuit channels exhibiting duty-cycle distortion - Disclosed herein are exemplary methods, apparatus, and systems for generating test sequences that can be used to evaluate high-speed circuit pathways that exhibit duty-cycle distortion (e.g., clock-related duty-cycle distortion or data-dependent duty-cycle distortion). In one exemplary embodiment, a period of an input signal is divided into two or more subintervals, each subinterval having a duration that is different from other subintervals. Pulse representations are generated for each of the subintervals, the pulse representations representing pulse durations corresponding to the respective durations of each of the subintervals. Inverted sampled pulse responses are generated to the pulse representations. Samples from two or more of the inverted sampled pulse responses are combined to create one or more combined inverted sampled pulse responses. A test sequence is determined for testing the electrical behavior of a circuit channel using the one or more combined sampled pulse responses and stored on one or more computer-readable media. | 2008-11-06 |
20080273585 | Apparatus for Estimating Phase Error and Phase Error Correction System Using the Same - Provided are an apparatus for estimating a phase error and a phase error correcting system using the phase error estimating apparatus. The apparatus includes: a probability value estimating unit for estimating a negative log probability value for each transmission symbol by transforming a soft output information transferred from the outside to a log A posterior probability ratio (LAPPR) value; an APP value calculating unit for calculating a posterior probability (APP) value by applying a negative exponential function to the transmission symbol; an average value deciding unit for deciding an average value for each transmission symbol using the probability information entirely, partially, or selectively according to a probability information type; and a symbol phase estimating unit for estimating a phase of a symbol based on the decided average value. | 2008-11-06 |
20080273586 | Maximum Likelihood Block Decision Feedback Estimation for CCK Demodulation Apparatus and Method - A system for demodulation of CCK symbols into data includes a post equalization register having values computed from feedback filter coefficients determined during a packet preamble, where the feedback filter coefficients are provided to a reduced complexity post equalization value generator which populates the post equalization register with an iteration variable i. During a demodulation interval, a pre-equalize register has values computed from the previous data, which are used to perform decision feedback equalization. A demodulator has a first subtractor which subtracts the contents of the corresponding pre-equalize register from a current symbol, and the output of this subtractor is coupled to a simple Fast Walsh Transform (FWT) with an iteration variable k. The output of the FWT is coupled to a second subtractor for subtracting a plurality of ICI corrections for all possible current symbols computed and stored in the post equalization registers from the post-FWT domain value of the current CCK symbol. The demodulator iteration variable k is used for performing the demodulation of a current symbol into current data by performing the subtraction of current symbol ICI in k iterations using the same hardware. | 2008-11-06 |
20080273587 | Sensor, More Specifically a Position Sensor, for a Vehicle With Several On-Board Measuring Systems Working Independently From One Another - The invention presented herein describes a sensor, more specifically a position sensor for a vehicle, featuring several measuring systems that work independently of one another, where each of the measuring systems generates a pulse width-modulated signal becoming available at an output of the sensor one by one, where each of the sensor values is coded according to the duty factor of a pulse compared with the period of the signals, and where the sensor has means of synchronizing the sensor with a receiving station, wherein the means of synchronization is used to modify the amplitude and/or the period of one or several pulses. | 2008-11-06 |
20080273588 | Matrix Compression Arrangements - This invention relates to utilising image compression and reconstruction algorithms for transmission and reception of data that can be represented as a numerical matrix or a sequence of numerical matrices in bandwidth limited channels. The method and algorithms described herein may reduce data size to such an extent that data that was considered too large to be practically transmitted in a useful time frame can be transmitted in real or near real time. The algorithms can be applied to data communications for a variety of sensor, electronic and information systems. | 2008-11-06 |
20080273589 | Digital Broadcasting Transmission/Reception System Utilizing Srs and Trs Code to Improve Receiving Performance and Signal Processing Method Thereof - A digital broadcasting transmission and/or reception system having an improved reception performance and a signal-processing method thereof. A digital broadcasting transmitter comprises a TRS encoder for to TRS-encode an MPEG-2 transmission stream having null data for inserting an SRS data and a TRS parity at predetermined positions, randomizer to input and randomize data stream from the TRS encoder, a SRS exchanger to replace the null data for inserting the SRS data to the known data, and an encoder for encoding a data streams to which the Known data is inserted. Accordingly, the present invention detects the known data from a signal received from a reception side and uses the detected known data for synchronization and equalization and further uses the TRS parity for correcting error of the received signal, so that the digital broadcasting reception performance can be improved at poor multipath channels. | 2008-11-06 |
20080273590 | Detection and compensation of discontinuities in data stream - In one embodiment of the invention, a method includes receiving a video stream that includes a temporal discontinuity. Checkpoints are distributed in a non-linear fashion with unequal spacing between the checkpoints. The temporal discontinuity is then detected at one of the checkpoints. | 2008-11-06 |
20080273591 | Methods and apparatus for predictive capacity allocation - Methods and apparatus for dynamically adjusting capacity allocation; e.g., to a group of services in a multimedia distribution network. In one embodiment, bandwidth allocation is adjusted by predicting bandwidth utilization of the group of services based on historical bandwidth utilization information. Behavioral templates and statistical models may also be employed for the predictions. The invention provides more efficient use of available bandwidth compared to conventional bandwidth allocation schemes where the overall bandwidth for a group of services is set to a constant value that is not changed frequently. The present invention further provides a bandwidth allocation method in a switched distribution network. The bandwidth allocation method allocates bandwidth such that the bandwidth required by the number of services does not exceed the allocation, i.e., the total usage falls within the allocation. | 2008-11-06 |
20080273592 | Video Encoding and Decoding - A method of producing encoded video data (DV) comprises the steps of: collecting video data (VS), producing a tag (T) identifying the collected video data, encoding the collected video data so as to produce at least two sets of encoded data (BL, EL | 2008-11-06 |
20080273593 | Processing Compressed Video Data - Video data is compressed for streaming to mobile devices. The data includes spatially compressed frames (I frames) followed by a plurality of temporally compressed frames (P frames) a source of input video data is coded to produce compressed data having I frames and P frames. The data volume of the I frames is compared with that of the P frames. In response to the data volume of the I frames being too large when compared to the data volume of the P frames, the input video data is coded again to produce I frames having a smaller data volume. | 2008-11-06 |
20080273594 | Processing Video Data - The optimising of video data files for downloading to a mobile device is disclosed, in which the total data volume of the file is limited. An input video clip of image frames is coded to produce a first coded video data file having a predetermined data volume. A measure of spatial data loss is obtained and the obtained measure of data loss is compared against a predetermined data loss value. If too much spatial loss has occurred, frames are removed from the input clip and a re-coding process is performed of the input video clip to produce an alternative output data file. Preferably, the data frame-rate is not allowed to drop below a predetermined minimum and if too much spatial loss still occurs, audio quality is reduced. | 2008-11-06 |
20080273595 | APPARATUS AND RELATED METHOD FOR PROCESSING MACROBLOCK UNITS BY UTILIZING BUFFER DEVICES HAVING DIFFERENT DATA ACCESSING SPEEDS - A method for processing a plurality of macroblock units in a video image is disclosed. The method includes: performing a specific video processing operation upon at least a first macroblock unit; storing information of the first macroblock unit in a first buffer device; storing the information of the first macroblock unit read from the first buffer device into a second buffer device, wherein a data accessing speed of the second buffer device is faster than a data accessing speed of the first buffer device; and performing the specific video processing operation upon a second macroblock unit in the plurality of macroblock units according to the information of the first macroblock unit stored in the second buffer device. | 2008-11-06 |
20080273596 | DIGITAL MULTIMEDIA CHANNEL SWITCHING - The disclosure relates to techniques for coding a channel switch frame used for switching between channels of digital multimedia content. In particular, an encoding device may code channel switch frame to exclude one or more blocks of pixels that may be reconstructed at a desired fidelity at a decoding device using one or more spatial error concealment algorithms. Excluding the one or more blocks of pixels of the channel switch frame that can be reconstructed at a desirable fidelity reduces the amount of bandwidth necessary to code the portion of the channel switch frame, thus allowing more efficient utilization of available bandwidth. | 2008-11-06 |
20080273597 | Method for searching for motion vector - Disclosed is video encoding technology, and more particularly a method for searching for a motion vector in a procedure of estimating a motion in video frames. The motion vector search method includes the steps of: individually calculating error energies of a center point and vertices of a search pattern in a search window used in a previous frame with respect to a center of the search window established in the current frame, thereby designating a motion vector candidate point; either determining the motion vector candidate point as a moving point of a motion vector, or calculating error energies of a pair of neighboring points and re-establishing a motion vector candidate point; and either determining the re-established motion vector candidate point as a moving point of a motion vector, or re-establishing a search pattern, re-checking the error energies of the center point, the vertices and the neighboring points, and determining a moving point of a motion vector. | 2008-11-06 |
20080273598 | Digital video codec using small-sized buffer memory - Techniques, systems and apparatus for digital information processing are described. In particular, techniques, systems and apparatus are described for reducing the size of buffer memory used. In one aspect, a digital video codec includes a buffer memory including an individual area to individually record different Minimum Coded Block (MCB) line data, and a common area to commonly record the different MCB line data. The codec also includes video encoder connected to the buffer memory to encode video data recorded in the individual area and the common area. Further, the codec includes a memory controller connected to the buffer memory to divisionally record a MCB line data in the individual area and the common area, and during encoding of the MCB line data, record another MCB line data in an encoding-completed area of the common area in a recording type corresponding to a memory structure of the encoding-completed common area. | 2008-11-06 |
20080273599 | METHOD AND APPARATUS FOR ENCODING AND DECODING MULTI-VIEW VIDEO DATA - Provided are a method and apparatus for encoding and decoding multi-view video data. The method of encoding multi-view video data includes determining whether a current picture is an anchor picture; and encoding blocks of the current picture by selectively applying a skip block mode to the blocks if the current picture is the anchor picture. According to the present invention, image quality and coding efficiency may be improved. | 2008-11-06 |
20080273600 | METHOD AND APPARATUS OF WIRELESS COMMUNICATION OF UNCOMPRESSED VIDEO HAVING CHANNEL TIME BLOCKS - A method and system for transmission of uncompressed video information from a sender to a receiver over wireless channels is disclosed. For example, according to one embodiment, a time division multiple access method is used to allocate channel time blocks (CTBs) of a wireless channel to a particular transmitting device. If the transmitting device encounters a data underflow condition in which insufficient data for filling a reserved CTB is available for transmission, alternate data is identified for transmission during the otherwise unused reserved time period. Accordingly, embodiments include systems and methods of using such partially utilized CTBs. | 2008-11-06 |
20080273601 | Communication Network Based on Master/Slave Architecture for Connecting Sensors and Actuators - A communications network for servo systems and the like comprises a controller, first and second slave nodes configured to respond to control signals from the controller and to send respective feedback control signals to the controller, and a control signal transmission line between the controller and the slave nodes; wherein communication between said controller and said slave nodes employs reflective signaling, and wherein the transmission line incorporates a router configured to route control signals from said controller to one or other of said first and second slave nodes in dependence on a further signal from said controller. | 2008-11-06 |
20080273602 | DATA TRANSMISSION APPARATUS WITH INFORMATION SKEW AND REDUNDANT CONTROL INFORMATION AND METHOD - Apparatus and methods provide at least redundant control information such as control symbols and control data over respective channels, such as differential lanes, and skew at least the redundant control information in time between the plurality of transmission circuits. Non-control information such as video and/or audio data may also be skewed. Corresponding receiver circuits and methods are also disclosed. | 2008-11-06 |
20080273603 | DIFFERENTIAL SIGNAL TRANSMITTING APPARATUS AND DIFFERENTIAL SIGNAL RECEIVING APPARATUS - A differential signal transmitting apparatus for transmitting a differential signal through two transmission lines. The apparatus includes: transmitting-side board connecting terminals | 2008-11-06 |
20080273604 | TRANSMISSION METHOD AND SYSTEM FOR THE DISCRETE MULTI-MODULATION DATA - A transmission method and system of the discrete multi-modulation data, the method includes: generating, at a transmitting side, a first bit table according to data to be transmitted, wherein items of the first bit table include carrying data information on each line during this data transmission; modulating and transmitting, at the transmitting side, the data according to the first bit table to a receiving side; and demodulating, at the receiving side, the received data according to the first bit table to obtain corresponding data. With the transmission method and system for discrete multi-modulation data provided in embodiments of the present invention, the line rate and the transmission power on lines can be dynamically and timely adjusted according to information ratio of the line transmission, by using a dynamic bit table (BIT table) to carry variable information on the data carried by lines, thereby saving power resource. | 2008-11-06 |
20080273605 | HIGH BANDWIDTH DATA TRANSPORT SYSTEM - The present invention provides for a methods, system, and apparatus relating to data transmission. One method of the present invention includes representing data using at least one ultra wideband pulse, sending the at least one ultra wideband pulse over an electrically conductive guided media, and recovering the data from the at least one ultra wideband pulse. The present invention can be used in conjunction with telephony applications, cable TV applications, power line applications, fiber optic applications, and data bus applications. | 2008-11-06 |
20080273606 | Method For Signaling the Status of a Subcarrier in a Mc Network and a Method For Adaptively Allocating the Subcarrieres in a Mc Network - A fast method for allocating those channels or subcarriers of a multicarrier network to an ahead lying transmission is to let a transmitting terminal and a receiving terminal which intend to access the medium determine the status of the channels or subcarriers that are within their reception range and send a signal indicating the determined status to the corresponding terminal which will select those channels or subcarriers for the eventual transmission which fit best. Other terminals within the transmission range of the transmitting or the receiving terminal respect the reservation and wait for the current transmission to find out which channels or subcarriers are actually used. | 2008-11-06 |
20080273607 | RANGING AND ROUND TRIP DELAY TIMING ADJUSTMENT IN A MULTI-POINT TO POINT BIDIRECTIONAL COMMUNICATION SYSTEM - A bidirectional communication system is provided. In one embodiment, a system comprises a host unit to communicate with a plurality of remote units using orthogonal frequency division multiplexing (OFDM), the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration; and wherein the host unit is configured to adjust a round trip path delay associated with at least one of the plurality of remote units. | 2008-11-06 |
20080273608 | Method and Apparatus for Correcting IQ Imbalance in an OFDM Receiver - Methods and apparatus for processing received OFDM signals to compensate for distortions caused by IQ imbalances are disclosed. Receiver circuits may be configured to demodulate symbols from a first logical channel, using an uncompensated received OFDM signal that includes the effects of those distortions. Receiver circuits may be further configured to calculate an IQ imbalance parameter, using the demodulated symbols, for use in compensating the received OFDM signal to reduce the effects of the IQ imbalances. The compensated signal produced thereby may be used for demodulating symbols from a second logical channel, perhaps corresponding to a user data channel. | 2008-11-06 |
20080273609 | RECEIVING APPARATUS, TRANSMITTING APPARATUS, AND RECEPTION METHOD - Channel fluctuation values on propagation paths of modulated signals transmitted from a plurality of antennas are estimated, an eigenvalue of a channel fluctuation matrix created with the above-mentioned channel fluctuation values as elements is found in order to relate antenna received signals to modulated signals, and using that eigenvalue, receiving antenna selection, combining of modulated signals, and weighting processing on soft decision decoded values, are performed, and modulated signals are demodulated. By this means, it is possible to perform demodulation processing based on the effective reception power of a modulated signal (that is to say, the essential reception power, of the reception power obtained by a receiving apparatus, that can be effectively used when demodulating a modulated signal), enabling the precision of demodulation of modulated signals to be improved. | 2008-11-06 |
20080273610 | METHOD AND APPARATUS FOR RANDOM ACCESS IN AN ORTHOGONAL MULTIPLE-ACCESS COMMUNICATION SYSTEM - Techniques for accessing a wireless communication system are described. A user equipment (UE) sends a random access preamble for system access. The random access preamble may include a random identifier (ID), a channel quality indicator (CQI), etc. The UE may randomly select the random ID or may be assigned this random ID. The UE receives a random access response from a base station. The random access response may include control channel resources (e.g., CQI and PC resources), uplink resources, and/or control information (e.g., timing advance and PC correction) for the UE. The random access response may be sent in two parts using two messages. A first message may be sent on a control channel and may include identification information and possibly other information. A second message may be sent on a shared data channel and may include remaining information for the random access response. | 2008-11-06 |
20080273611 | Equalization for Zero Prefix Ofdm Systems - The system, apparatus, and method ( | 2008-11-06 |
20080273612 | Codebook Method for A Multiple Input Multiple Output Wireless System - A method for wireless encoding includes encoding wireless multiple input and multiple output signals in accordance with a codebook being one of a discrete codebook restricting elements of codebook entries to be within a predetermined finite set of complex numbers and a constant amplitude codebook including each entry in its codebook having equal column norm and equal row norm. In a preferred embodiment the digital codebook further includes restricting elements of a finite set in the discrete codebook to be in the form of k | 2008-11-06 |
20080273613 | MULTIPLE INPUT, MULTIPLE OUTPUT (MIMO) COMMUNICATION SYSTEM OVER IN-PREMISES WIRES - A multiple input, multiple output (MIMO) communications unit includes a multiplicity of analog front ends and a MIMO processor. Each analog front end is connectable to a different two of the wires in a subscriber premises and each handles data of one channel. The MIMO processor processes together the data of the channels. In one embodiment, the wires are the power line wires in a subscriber premises, including the phase, neutral and ground power line wires. In another embodiment, the wires are pairs of telephony wires. | 2008-11-06 |
20080273614 | SYSTEM, METHOD, AND COMPUTER-READABLE MEDIUM FOR MULTILEVEL SHAPING FOR WIRELESS COMMUNICATION SYSTEMS - A system, method and computer-readable medium for encoding and decoding digital information over a channel is provided. Type Mapping is employed and is based on the partitioning of vectors over an alphabet into “types” and using enumeration for the encoding and decoding process. Type mapping allows for signal alphabets of arbitrary size and date rate flexible coding. Tradeoffs between optimal rate versus Signal to Noise Ratio are provided and works as a compliment to the Forward Error Control that may be employed in communications products. | 2008-11-06 |
20080273615 | CHANNEL PROFILE ESTIMATION FOR OFDM-BASED COMMUNICATION SYSTEM - A device and method for performing a channel profile estimation for an OFDM-based wireless communication system uses an averaged frequency coherence metric to select a particular channel profile, which is a current channel profile estimate. The averaged frequency coherence metric is derived using correlations between pilot subcarriers of an OFDM-based signal at predefined subcarrier locations for multiple frames of the OFDM-based signal. The selected channel profile may be used for channel estimation, as well as for link adaptation, to improve the performance of these processes. | 2008-11-06 |
20080273616 | BASE STATION TRANSMITTER FOR USE WITH AN OFDM COMMUNICATIONS SYSTEM, A METHOD OF DYNAMICALLY ALLOCATING OFDM SYMBOLS FOR PDCCH IN THE SYSTEM AND A USER EQUIPMENT RECEIVER FOR USE WITH THE SYSTEM - A base station transmitter for use with an orthogonal frequency division multiplexing (OFDM) communications system, a method of dynamically allocating OFDM symbols needed for a physical downlink control channel (PDCCH) in a downlink sub-frame from a base station and a user equipment (UE) receiver for use with the OFDM communications system. In one embodiment, the UE receiver includes: (1) a receive unit configured to receive a downlink signal, the signal having groups of control information and (2) a processing unit configured to extract from the groups of control information a number of OFDM symbols needed for PDCCH in a sub-frame of the downlink signal. | 2008-11-06 |
20080273617 | STEERING DIVERSITY FOR AN OFDM-BASED MULTI-ANTENNA COMMUNICATION SYSTEM - A transmitting entity uses different steering vectors for different subbands to achieve steering diversity. Each steering vector defines or forms a beam for an associated subband. Any steering vector may be used for steering diversity. The steering vectors may be defined such that the beams vary in a continuous instead of abrupt manner across the subbands. This may be achieved by applying continuously changing phase shifts across the subbands for each transmit antenna. As an example, the phase shifts may change in a linear manner across the subbands for each transmit antenna, and each antenna may be associated with a different phase slope. The application of linearly changing phase shifts to modulation symbols in the frequency domain may be achieved by either delaying or circularly shifting the corresponding time-domain samples. | 2008-11-06 |
20080273618 | Precoding System and Method for Multi-User Transmission in Multiple Antenna Wireless Systems - A transmission method and system are provided wherein the system and method use precoding and sum rate optimization beam forming to create a capacity transmission. | 2008-11-06 |
20080273619 | DIGITAL BROADCASTING SYSTEM AND DATA PROCESSING METHOD - A digital broadcasting system and a data processing method are disclosed. Herein, additional encoding is performed on mobile service data, which are then transmitted, thereby providing robustness in the processed mobile service data, so that the mobile service data can respond more strongly against fast and frequent channel changes. The transmitting system includes a first encoding module grouping a plurality of inputted mobile service data bytes so as to form a RS frame and performing error correction encoding in RS frame units, a second encoding module encoding the primarily encoded and outputted data at a coding rate of G/H, wherein G is smaller than H (i.e., G2008-11-06 | |
20080273620 | APPARATUS, AND ASSOCIATED METHOD, FOR PROVIDING OPEN LOOP DIVERSITY IN A RADIO COMMUNICATION SYSTEM - Apparatus, and an associated method, for providing transmit diversity to an open-loop MIMO communication scheme, such as a point to multipoint broadcast service in a cellular system. Multiple data streams of the broadcast data are broadcast by way of transmit diversity antennas of a sending station. The data symbols of the separate data streams are phase-shifted to be offset in phase from one another. The data streams, once the data symbols thereof are selectably phase-shifted by a phase shifter, are applied by an applier to sending nodes of the respective cells. | 2008-11-06 |
20080273621 | Method and apparatus for estimating frequency offset and timing offset of one or more mobile stations (MSs) - A method and apparatus for estimating frequency offset and timing offset of a first Mobile Station (MS) in a communication system is provided. The method includes receiving a composite signal at a plurality of receiver antennas of a Base Transceiver Station (BTS). The composite signal includes a first signal transmitted from a first MS and a second signal transmitted from a second MS. The composite signal includes one or more tiles. Each tile includes a plurality of data sub-carriers, a plurality of first pilot sub-carriers, and a plurality of second pilot sub-carriers. A total phase offset of the first MS is estimated based on a complex conjugate product of pilot symbols of the plurality of first pilot sub-carriers. Thereafter, a first phase offset corresponding to the timing offset of the first MS is estimated based on a Power Delay Profile (PDP) of one or more first pilot sub-carriers. Finally, a second phase offset corresponding to the frequency offset of the first MS is determined based on the total phase offset and the first phase offset. | 2008-11-06 |