Patent application number | Description | Published |
20080205375 | SECONDARY SYNCHRONIZATION CHANNEL DESIGN FOR OFDMA SYSTEMS - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter for use in a base station of an OFDMA system and includes a primary module configured to provide a primary synchronization signal that furnishes a partial cell identity. Additionally, the transmitter also includes a secondary module configured to provide a secondary synchronization signal that furnishes a cell identity group and one or more cell-specific parameters based on using a two-segment secondary synchronization sequence. The transmitter further includes a transmit module configured to transmit the primary and secondary synchronization signals. | 08-28-2008 |
20080207135 | CQI FEEDBACK FOR OFDMA SYSTEMS - Embodiments of a feedback generator and decoder and methods of operating the feedback generator and decoder are presented. In one embodiment, the feedback generator includes a CQI compression module configured to provide a compressed CQI for the user equipment corresponding to at least one sub-band, where a sub-band is composed of at least one resource block. The feedback generator also includes a transmit module coupled to the CQI compression module and configured to transmit the compressed CQI to a serving base station. In one embodiment, the feedback decoder includes a receive module configured to receive a compressed CQI in the base station from user equipment corresponding to at least one sub-band. The feedback decoder also includes a CQI restoration module coupled to the receive module and configured to provide a restored CQI from the compressed CQI for the at least one sub-band. | 08-28-2008 |
20080219370 | USER EQUIPMENT FEEDBACK STRUCTURES FOR MIMO OFDMA - Embodiments of the present disclosure provide a feedback encoder, a feedback decoder and methods of operating the same. The feedback encoder, for use with user equipment, includes an encoding module configured to provide a rank indicator that is separately reportable from a related selection of at least one of a channel quality indicator and a preceding matrix indicator for the user equipment. The feedback encoder also includes a transmit module configured to transmit the rank indicator and the related selection. The feedback decoder, for use with a base station, includes a receive module configured to receive a rank indicator that is separately reportable from a related selection of at least one of a channel quality indicator and a preceding matrix indicator for user equipment. The feedback decoder also includes a decoding module configured to decode the rank indicator and the related selection for the base station. | 09-11-2008 |
20080267137 | COMPUTER GENERATED SEQUENCES FOR DOWNLINK AND UPLINK SIGNALS IN WIRELESS COMMUNICATION SYSTEMS - The present disclosure provides a base station transmitter, a user equipment transmitter and methods of operating the base station and user equipment transmitters. In one embodiment, the base station transmitter is for use with a cellular communication system and includes a synchronization unit configured to provide a randomly-generated constant amplitude zero autocorrelation (random-CAZAC) sequence corresponding to a downlink synchronization signal. Additionally, the base station transmitter also includes a transmit unit configured to transmit the downlink synchronization signal using the random-CAZAC sequence. In another embodiment, the user equipment transmitter is for use with a cellular communication system and includes a reference signal unit configured to provide a random-CAZAC sequence for an uplink reference signal corresponding to a one resource block allocation of the user equipment. The user equipment transmitter also includes a transmit unit configured to transmit the uplink reference signal using the random-CAZAC sequence. | 10-30-2008 |
20080268885 | LOW-COMPLEXITY PRIMARY SYNCHRONIZATION SEQUENCES - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter is for use with a base station in a in a cellular communication system and includes a scheduling unit configured to provide a primary synchronization signal selected from a group of multiple sequences, wherein at least two of the sequences have complex conjugate symmetry in the time domain. The transmitter also includes a transmit unit configured to transmit the primary synchronization signal. Additionally, the receiver includes a receive unit configured to receive a primary synchronization signal. The receiver also includes a detection unit configured to identify one of a plurality of primary synchronization signals corresponding to a communication cell location of the receiver, wherein at least two of a group of multiple sequences have complex conjugate symmetry in the time domain. | 10-30-2008 |
20080292013 | NESTED PRECODING CODEBOOK STRUCTURES FOR MIMO SYSTEMS - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter is for use with N | 11-27-2008 |
20080298326 | GUARD SUBCARRIER PLACEMENT IN AN OFDM SYMBOL USED FOR SYNCHRONIZATION - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter is for use with a base station in a cellular communication system and includes a partitioning unit configured to provide first and second groups of guard subcarriers that partition a synchronization portion from data portions in a downlink synchronization signal. The transmitter also includes a transmit unit configured to transmit the downlink synchronization signal. Additionally, the receiver is for use with user equipment in a cellular communication system and includes a receive unit configured to receive a downlink synchronization signal. The receiver also includes a processing unit configured to provide a synchronization portion based on employing first and second groups of guard subcarriers that partition the synchronization portion from data portions of the downlink synchronization signal. | 12-04-2008 |
20090017769 | EFFICIENT RANK AND PRECODING MATRIX FEEDBACK FOR MIMO SYSTEMS - The present disclosure provides a receiver, a transmitter and methods of operating a receiver or a transmitter. In one embodiment, the receiver includes a receive unit configured to receive transmissions from multiple antennas. The receiver also includes a rank feedback unit configured to feed back a transmission rank selection, wherein the transmission rank selection corresponds to a transmission rank feedback reduction scheme. The receiver further includes a preceding feedback unit configured to feed back a preceding matrix selection, wherein the preceding matrix selection corresponds to a preceding matrix feedback reduction scheme. | 01-15-2009 |
20090046569 | PRECODING MATRIX FEEDBACK PROCESSES, CIRCUITS AND SYSTEMS - An electronic device includes a first circuit ( | 02-19-2009 |
20090046808 | RATE MATCHING AND SCRAMBLING TECHNIQUES FOR CONTROL SIGNALING - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes an input padding module configured to provide padded bits having padding bits added to payload bits for one or more control channels, and a scrambling module configured to apply a masking sequence to one or more of the padded bits to generate scrambled bits. Additionally, the transmitter also includes an encoding module configured to perform forward error correction encoding and rate matching on the scrambled bits to obtain a required number of control channel output bits, and a transmit module configured to transmit the control channel output bits for one or more control channels. | 02-19-2009 |
20090074103 | RATE MATCHING TO MAINTAIN CODE BLOCK RESOURCE ELEMENT BOUNDARIES - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter is for use with multiple transmit antennas and includes an encoding unit configured to segment input bits into one or more code blocks. The transmitter also includes a rate matching unit configured to generate a stream of transmit bits from the one or more code blocks, wherein a group of transmit bits allocated to one resource element originates from only one of the one or more code blocks. The transmitter further includes a mapping unit configured to provide modulated symbols from the stream of transmit bits on a number of spatial transmission layers for one or more resource elements. The transmitter still further includes a transmit unit configured to transmit the modulated symbols employing the multiple transmit antennas. | 03-19-2009 |
20090080407 | SECONDARY SYNCHRONIZATION SIGNAL MAPPING - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter or a receiver. In one embodiment, the transmitter is for use with a base station and includes a primary module configured to provide a primary synchronization signal. The transmitter also includes a secondary mapping module configured to provide a secondary synchronization signal derived from two sequences taken from a same set of N sequences and indexed by an index pair (S | 03-26-2009 |
20090109909 | DIFFERENTIAL CQI FOR OFDMA SYSTEMS - Embodiments of the present disclosure provide a feedback generator, a feedback decoder and methods of operating a feedback generator and decoder. In one embodiment, the feedback generator is for use in user equipment and includes a CQI profile module configured to provide a differential channel quality indicator, wherein the differential channel quality indicator represents a difference between indices corresponding to allocatable channel quality indicators. The feedback generator also includes a transmit module that transmits the differential channel quality indicator. In one embodiment, the feedback decoder is for use in a base station and includes a receive module configured to receive a differential channel quality indicator. The feedback decoder also includes a CQI selection module configured to provide allocatable channel quality indicators from the differential channel quality indicator based on a differential index, wherein the differential index represents a difference between indices corresponding to the allocatable channel quality indicators. | 04-30-2009 |
20090154588 | CHANNEL QUALITY REPORT PROCESSES, CIRCUITS AND SYSTEMS - An electronic device includes a first circuit ( | 06-18-2009 |
20090180416 | Turbo HSDPA System - A method of power saving for a wireless transceiver (FIGS. | 07-16-2009 |
20090180563 | Turbo HSDPA System - A method of power saving for a wireless transceiver (FIGS. | 07-16-2009 |
20090232087 | User Equipment Multiplexing In Downlink Multiuser, Multiple Input Multiple Output Orthogonal Frequency Division Multiple Access - This invention is a method of downlink, multiuser, multiple input, multiple output communication between a single base station and plural user equipment. Resource buffers are distributed into sub-bands. Each user equipment is assigned to a sub-band with at least one sub-band assigned plural user equipment. The base station transmits user equipment according to assigned sub-bands. A single user equipment may be assigned one sub-band while plural user equipment are assigned to another sub-band. In one embodiment the base station has N transmit antennas. N user equipment is assigned to a first sub-band and less than N user equipment is assigned to a second sub-band. In another embodiment a first second user equipment is assigned a first sub-band and the first and a third user equipment are assigned to a second sub-band. | 09-17-2009 |
20090238256 | CQI FEEDBACK STRUCTURE - Embodiments of the present disclosure provide a reporting allocation unit, an indicator interpretation unit and methods of operating a reporting allocation unit and an indicator interpretation unit. In one embodiment, the reporting allocation unit includes an indicator configuration module configured to provide reporting interval and offset values of corresponding rank and channel quality indicators for user equipment. The reporting allocation unit also includes a sending module configured to transmit the reporting interval and offset values to the user equipment. | 09-24-2009 |
20090257523 | PSEUDORANDOM SEQUENCE GENERATION FOR OFDM CELLULAR SYSTEMS - In one embodiment, a transmitter includes a binary sequence generator unit configured to provide a sequence of reference signal bits, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to the transmitter and one or more time indices of the sequence. The transmitter also include a mapping unit that transforms the sequence of reference signal bits into a complex reference signal, and a transmit unit configured to transmit the complex reference signal. In another embodiment, a receiver includes a receive unit configured to receive a complex reference signal and a reference signal decoder unit configured to detect a sequence of reference signal bits from the complex reference signal, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to a transmitter and one or more time indices of the sequence. | 10-15-2009 |
20090262695 | RANK AND PMI IN DOWNLOAD CONTROL SIGNALING FOR UPLINK SINGLE-USER MIMO (UL SU-MIMO) - A method of operating a user equipment device includes extracting at least one rank indicator (RI) from an uplink grant, and adapting a transmission rank in response to said RI. At least two transmit antennas are configured to transmit according to said transmission rank. | 10-22-2009 |
20090262856 | HIGH DATA RATE UPLINK TRANSMISSION - A user equipment device has a control information decoder configured to receive and decode an uplink scheduling grant. A transmit module is configured to receive a rank indicator (RI) extracted by the decoder and adapt a transmission rank in response to the RI. At least two transmit antennas are configured to transmit according to the RI. | 10-22-2009 |
20090268831 | BACKWARD COMPATIBLE BANDWIDTH EXTENSION - A transmitter includes a bandwidth configuration unit configured to provide an increased system bandwidth corresponding to a bandwidth extension over multiple component carriers. Additionally, the transmitter also includes a transmit unit configured to employ the bandwidth extension. | 10-29-2009 |
20090285122 | UPLINK CONTROL FOR TIME-DIVISION DUPLEX WITH ASYMMETRIC ASSIGNMENT - A link configuration unit includes a hybrid bundling module configured to provide a hybrid ACK/NAK bundling structure for an uplink ACK/NAK entity from user equipment, wherein the hybrid ACK/NAK bundling structure corresponds to an uplink-downlink configuration of subframe assignments. Additionally, the link configuration unit also includes a sending module configured to transmit the hybrid ACK/NAK bundling structure to the user equipment. | 11-19-2009 |
20090310782 | MAPPING SCHEMES FOR SECONDARY SYNCHRONIZATION SIGNAL SCRAMBLING - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal. | 12-17-2009 |
20100002790 | Higher Order Multiple Input, Multiple Output Extension - A method of multiple input multiple output downlink communications including mapping complex-valued modulation symbols onto one or more transmission layers by mapping complex-valued modulation symbols onto the layers and preceding the complex-valued modulation block of vectors and generating a block of vectors mapped onto at least four antenna ports. A first embodiment employs a maximum of two layers per codeword. A second embodiment employs no more than two codewords. | 01-07-2010 |
20100027456 | NETWORK MIMO REPORTING, CONTROL SIGNALING AND TRANSMISSION - A coordinated multipoint transmitter is for use with a network MIMO super-cell and includes a coordination unit configured to provide joint link processing to coordinate a multipoint transmission corresponding to a set of transmission points. Additionally, the coordinated multipoint transmitter also includes a transmission unit configured to transmit the multipoint transmission using the set of transmission points. Additionally, a coordinated transmission receiver is for use with a network MIMO super-cell and includes a reception unit configured to receive a multipoint transmission corresponding to a set of transmission points. The coordinated transmission receiver also includes a processing unit configured to process the multipoint transmission from the set of transmission points. | 02-04-2010 |
20100034312 | Reference Signal Resource Allocation for Single User MIMO - Transmission with multiple antennas in a wireless network is performed by transmitting a plurality of reference sequences (RS) from a UE. A first RS s1[k] is produced using a first cyclic shift and a base sequence s0[k], wherein k={1, 2 . . . K} is an element index. A second RS s2[k] is produced using a second cyclic shift and s0[k]. A first symbol sequence x1[k] is produced using at least s1[k] and s2[k], for at least one k. A second symbol sequence x2[k] is produced using at least s1[k] and s2[k], for at least one k. x1[k] is transmitted using a first transmit antenna and x2[k] is transmitted using a second transmit antenna. | 02-11-2010 |
20100040172 | HIGH DATA RATE CLOSED LOOP MIMO SCHEME COMBINING TRANSMIT DIVERSITY AND DATA MULTIPLEXING - Closed loop multiple-antenna wireless communications system with antenna weights determined by maximizing a composite channel signal-to-interference-plus-noise ratio minimum. Multiplexed symbol streams over subsets of antennas enhance throughout. | 02-18-2010 |
20100041390 | Configuration of Rank Indicator Reporting Instances - A method for setting a periodicity and an offset in rank indicator (RI) reporting in a user equipment in a wireless communication system receives a radio resource control (RRC) signal from a base station, decodes a RI periodicity and offset configuration index, sets the periodicity and offset in accordance with said decoded periodicity and offset configuration index and reports a RI according to the set periodicity and offset. The periodicity is an integer and reporting a RI reports with equal the product of the periodicity and a period of reporting of the channel quality indicator (CQI) and the preceding matrix indicator (PMI). | 02-18-2010 |
20100046412 | REFERENCE SIGNAL STRUCTURES FOR MORE THAN FOUR ANTENNAS - A transmitter, for use with a cellular communication network, includes a reference signal generation unit configured to provide a reference signal corresponding to a reference signal structure for more than four transmit antennas. The transmitter also includes a system information signal generation unit configured to provide a system information signal corresponding to the reference signal structure for the more than four transmit antennas. The transmitter additionally includes a transmit unit configured to transmit the reference signal and the system information signal. | 02-25-2010 |
20100056079 | RETRANSMISSION BETWEEN DCI FORMAT 1A AND FORMAT 2/2A - A transmitter is for use with a cellular communication network and includes a downlink control information (DCI) configuration unit that designates a DCI format for a downlink transmission selected from a first DCI format intended for a single transport block contiguous resource block transmission and a second DCI format intended for a dual transport block transmission available for spatial multiplexing. The transmitter also includes a retransmission coordination unit configured to facilitate a retransmission for the downlink transmission of a transport block corresponding to the first DCI format using the second DCI format or one of the dual transport blocks corresponding to the second DCI format using the first DCI format, based on a retransmission rule. | 03-04-2010 |
20100061360 | DEDICATED REFERENCE SIGNAL STRUCTURES FOR SPATIAL MULTIPLEXING BEAMFORMING - A transmitter is for use with a cellular communication network and includes a beamforming generation unit configured to generate a downlink beamforming transmission corresponding to multiple-layer spatial multiplexing and based on a dedicated reference signal pattern. Additionally, the transmitter also includes a transmit unit configured to transmit the downlink beamforming transmission. A receiver is for use with a cellular communication network and includes a receive unit configured to receive a downlink beamforming transmission, and a beamforming processing unit configured to process the downlink beamforming transmission corresponding to multiple-layer spatial multiplexing and based on a dedicated reference signal pattern. | 03-11-2010 |
20100067604 | NETWORK MULTIPLE ANTENNA TRANSMISSION EMPLOYING AN X2 INTERFACE - A coordinated multipoint transmitter is for use with a multiple antenna super-cell and includes primary and secondary base stations jointly connected via an X2 interface link, wherein the primary base station provides a transmission directive corresponding to an X2 interface protocol over the X2 interface link to the secondary base station for a joint transmission from the primary and secondary base stations. | 03-18-2010 |
20100074131 | POWER OFFSET FOR CQI REPORTING - In one embodiment, the transmitter is for use with a cellular communication network and includes an offset determination unit configured to select a shift parameter for a channel quality indication, wherein the shift parameter corresponds to an adjustment in an energy per resource element ratio for reporting the channel quality indication. The transmitter also includes a sending unit configured to signal the shift parameter. In another embodiment, a receiver is for use with a cellular communication network and includes a reception unit that receives a transmission. The receiver also includes an offset interpretation unit configured to interpret a shift parameter for a channel quality indication from the transmission, wherein the shift parameter corresponds to an adjustment in an energy per resource element ratio for reporting the channel quality indication. | 03-25-2010 |
20100074183 | MODE SWITCHING FOR A DOWNLINK COORDINATED MULTIPOINT COMMUNICATION - A mode-switching network transmitter is for use with a network MIMO super cell and includes a super cell control unit configured to orchestrate a transmission from the network MIMO super cell, wherein the transmission is supplied from a portion of super cell transmission points. The mode-switching network transmitter also includes a transmission unit configured to provide the transmission. Additionally, a transmission mode-switching receiver is for use with user equipment in a network MIMO super cell and includes a reception unit configured to receive a transmission for the user equipment within the network MIMO super cell. The transmission mode-switching receiver also includes a processing unit configured to process the transmission, wherein the transmission is supplied from a portion of super cell transmission points. | 03-25-2010 |
20100091678 | DOWNLINK RANK INDICATION AND UPLINK RANK REPORTING FOR DEDICATED BEAMFORMING - A network transmitter and receiver are for use with a network MIMO super cell. The network transmitter includes a rank control unit configured to provide a rank indication for a dedicated beamforming transmission from the network MIMO super cell, wherein the rank indication corresponds to spatial multiplexing of multiple data streams for the dedicated beamforming transmission. The network transmitter also includes a transmission unit configured to signal the rank indication. The network receiver includes a reception unit configured to receive a dedicated beamforming transmission within the network MIMO super cell. The network receiver also includes a rank processing unit configured to process a rank indication for the dedicated beamforming transmission corresponding to spatial multiplexing of multiple data streams for the dedicated beamforming transmission. | 04-15-2010 |
20100124297 | Receiving a Pilot Design and Channel Estimation - Embodiments of the invention provide a receiver in an OFDM based communication system adapted to perform channel estimation using a received reference signal transmitted from at least one antenna, said reference signal being substantially located into two OFDM symbols of a transmission time interval comprising of more than two OFDM symbols. A method of generating pilot structure, the pilot structure provides information to an apparatus for channel estimation in the OFDM system with a transmission time interval of seven OFDM symbols. The pilot structure comprising pilot signals from at least one transmitting antenna located in various OFDM symbols of the transmission time interval. | 05-20-2010 |
20100189038 | CIRCUIT AND METHOD FOR MAPPING DATA SYMBOLS AND REFERENCE SIGNALS FOR COORDINATED MULTI-POINT SYSTEMS - A method of mapping data in a wireless communication system is disclosed. The method includes forming a first frame ( | 07-29-2010 |
20100214937 | Rank Indicator Offset for Periodic CQI Reporting with Periodicity of One - This invention prevents a periodically reported Rank Indicator from interfering with a similarly periodically reported wideband and subband channel quality indicator. Such interference is disadvantageous because it may eliminate wideband channel quality indicator reporting or eliminate each first bandwidth part of subband channel quality indicator reporting. Proper selection of the rank indicator reporting periodicity and offset relative to the wideband and subband channel quality indicator reporting periodicity prevents this interference. | 08-26-2010 |
20100215109 | Layer Mapping for Up Link Single User Multiple Input Multiple Output Wireless Telephony - This invention is a method and an apparatus to up link transmission of data from a user equipment to a base station for single user multiple input, multiple output. This invention includes receiving at least one codeword, permuting the received codewords, precoding the permuted codewords and transmitting the predecoded codewords on plural antennas. The codewords may be permuted by layer permutation or by codeword permutation. | 08-26-2010 |
20100215110 | PRECODING CODEBOOK DESIGN FOR SINGLE USER MIMO - A transmitter is for use with multiple transmit antennas and includes a precoder unit configured to precode data for a transmission using a precoding matrix selected from a codebook, wherein the codebook corresponds to the following three transmission properties for an uplink transmission: 1) all precoding elements from the precoding matrix have a same magnitude, 2) each precoding element from the precoding matrix is taken from a set of finite values and 3) there is only one non-zero element in any row of the precoding matrix. The transmitter also includes a transmit unit configured to transmit the precoded data. | 08-26-2010 |
20100226413 | METHOD AND APPARATUS FOR INCREASING THE NUMBER OF ORTHOGONAL SIGNALS USING BLOCK SPREADING - Embodiments of the invention apply block spreading to transmitted signals to increase the number orthogonally multiplexed signals. The principle of the disclosed invention can be applied to reference signals, acknowledgement signals, and channel quality indication signals. In any given time interval, the set of transmitted signals is defined by two sequences: the baseline sequence, and the block spreading sequence. Different transmitters using the same baseline sequence can be identified by using different block spreading sequences. | 09-09-2010 |
20100260151 | Joint Processing Downlink Coordinated Multi-Point Reference Signal Support - This invention concerns multiplexing in Long Term Evolution (LTE) and Long Term Evolution-Advanced (LTE-A) in Evolved Universal Terrestrial Radio Access Network (E-UTRAN) wireless telephony. Joint processing down link coordinated multi-point reference signaling includes combining resource signal types at a user equipment, determining conflicts between resource signals of plural user equipment, puncturing resource signals of other cell upon determining conflicts between resource signals of plural user equipment and transmitting non-punctured combined resource signals from a user equipment. | 10-14-2010 |
20100272006 | Design of In-Band Backhaul for Wireless Relays in Wireless Networks - This invention extends the coverage and improves the capacity of wireless communication networks using relay nodes. The relay nodes are wirelessly connected to the base station. The base station uses the same radio access technology for a link between the base station and user equipment and between the base station and the relay node. The relay node uses the same radio access technology for a link between the base station and the relay node and between the relay node and the user equipment. The relay node supports at least a Physical Layer (PHY), a Medium Access Control (MAC) sub-layer and a Radio Link Control (RLC) sub-layer protocol. | 10-28-2010 |
20100272007 | Protocol Stack and Scheduler for L3 Relay - This invention is a method for extending the coverage and/or improving the capacity of wireless communication networks comprising inserting a Relay Node (RN) in the Radio Access Network (RAN). The relay node relays the signal between the Base Station node (eNB) and the User Equipment (UE). The relay node is wirelessly connected to the base station. The base station uses the same radio access technology (RAT) for the base station to user equipment link and the base station to relay node link. The relay node uses the same radio access technology for the base station to relay node link and the relay node to user equipment link. The relay node is non-transparent and seen as base station by the user equipment. | 10-28-2010 |
20100273495 | Predecoding for Joint Processing Coordinated Multi-Point Transmission - This invention is a method of predecoding for joint processing coordinated multi-point transmission. The invention identifies for a particular transmission the cooperating point and the transmit antenna. The invention selects a code by reference to a selected one of a super-cell codebook for each combination of cooperating point and transmit antenna and a multi-cell codebook for each transmit antenna regardless of the cooperating point. | 10-28-2010 |
20110064029 | DOWNLINK SIGNALING FOR A MULTI-CARRIER COMMUNICATIONS SYSTEM - System and method for signaling control information in a multi-carrier communications system to transmit data. A preferred embodiment comprises demodulating a first carrier that is used for transmitting a control channel transmission, determining a second carrier that is used for transmitting a data channel transmission based upon the demodulated control channel transmission, and demodulating the second carrier to obtain the data channel transmission. Additionally, designs for multi-carrier receivers are provided. | 03-17-2011 |
20110142147 | MULTI-RANK PRECODING MATRIX INDICATOR (PMI) FEEDBACK IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) SYSTEM - In at least some embodiments, a system includes a multiple-input multiple-output (MIMO) base station and a plurality of MIMO user equipment (UE) devices in communication with the MIMO base station. The MIMO base station is configured to switch between a single-user (SU)-MIMO mode and a multiple-user (MU)-MIMO mode during communications with the plurality of MIMO UE devices based on multi-rank precoding matrix indicator (PMI) feedback received from at least one of the MIMO UE devices. | 06-16-2011 |
20110211662 | ANTENNA GROUPING AND GROUP-BASED ENHANCEMENTS FOR MIMO SYSTEMS - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter has at least three transmit antennas and includes a feedback decoding portion configured to recover at least one group-based channel quality indicator provided by a feedback signal from a receiver, wherein each group-based channel quality indicator corresponds to one of a set of transmission layer groupings. The transmitter also includes a modulator portion configured to generate at least one symbol stream and a mapping portion configured to multiplex each symbol stream to at least one transmission layer grouping. The transmitter further includes a pre-coder portion configured to couple the transmission layers to the transmit antennas for a transmission. The receiver includes a decoder portion which is configured to use decoded signals from at least one group to decode the other groups. | 09-01-2011 |
20110243009 | Physical Downlink Shared Channel Muting on Cell-Specific Reference Symbols Locations for of Non-Serving Cells - The primary serving base station transmits PDSCH with zero energy on the inter-cell CRS resource element location. This is called mute PDSCH. Within the first Physical Resource Block (PRB | 10-06-2011 |
20110243079 | Transmission Modes and Signaling for Uplink MIMO Support or Single TB Dual-Layer Transmission in LTE Uplink - This invention is a method of wireless telephony. A bases station configures a user equipment for single-antenna port or multi-antenna port operation via Radio Resource Control (RRC) signaling including a 5-bit MCS-RV and 1-bit NDI for the second codeword (CW1) are needed for the DCI format 4. | 10-06-2011 |
20120008710 | Mapping Schemes for Secondary Synchronization Signal Scrambling - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal. | 01-12-2012 |
20120008718 | Wireless Precoding Methods - Various wireless precoding systems and methods are presented. In some embodiments, a wireless transmitter comprises an antenna precoding block, a transform block, and multiple transmit antennas. The antenna precoding block receives frequency coefficients from multiple data streams and distributes the frequency coefficients across multiple transmit signals in accordance with frequency-dependent matrices. The transform block transforms the precoded frequency coefficients into multiple time domain transmit signals to be transmitted by the multiple antennas. The frequency coefficients from multiple data streams may be partitioned into tone groups, and all the frequency coefficients from a given tone group may be redistributed in accordance with a single matrix for that tone group. In some implementations, the frequency coefficients within a tone group for a given data stream may also be precoded. In some alternative embodiments, tone group precoding may be employed in a single channel system. | 01-12-2012 |
20120189126 | MAPPING SCHEMES FOR SECONDARY SYNCHRONIZATION SIGNAL SCRAMBLING - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter includes a synchronization unit configured to provide a primary synchronization signal and a secondary synchronization signal having first and second segments. The transmitter also includes a secondary scrambling unit configured to provide a scrambled secondary synchronization signal, wherein scrambling agents for the first and second segments are derived from a primary synchronization sequence of the primary synchronization signal. The secondary scrambling unit is further configured to provide an additional scrambling of one of the first and second segments, wherein a second scrambling agent is derived from the remaining segment of a secondary synchronization sequence of the secondary synchronization signal. The transmitter further includes a transmit unit configured to transmit the primary synchronization signal and the scrambled secondary synchronization signal. | 07-26-2012 |
20120195246 | Method for Transmission of Unicast Control in Broadcast/Multicast Transmission Time Intervals - Embodiments of the invention provide methods for maximizing the bandwidth utilization in the uplink of a communication system supporting time division multiplexing between unicast and multicast/broadcast communication modes during transmission time intervals in the downlink of a communication system. This is accomplished by multiplexing at least unicast control signaling for UL scheduling assignments in TTIs supporting the multicast/broadcast communication mode. Moreover, multiplexing of unicast control signaling can also be accomplished by splitting a symbol of the multicast/broadcast TTI into two shorter symbols with the first of these two shorter symbols carrying at least unicast control signaling and the second of these shorter symbols carrying multicast/broadcast signaling. | 08-02-2012 |
20120218937 | User Equipment Feedback In Support of Multiple Input Multiple Output Operations - A method of feedback in wireless telephony includes a hybrid of implicit and explicit feedback. The implicit and explicit feedback are transmitted in distinct subframes. These distinct set of subframes may have the same periodicity but differing offsets. The distinct set of subframes may have periodicities related by an integral factor. Either set of subframes may include aperiodic subframes. | 08-30-2012 |
20120218948 | Downlink 8 Tx Codebook Sub-Sampling for CSI Feedback - This invention is codebook sub-sampling of the reporting of RI, CQI, W | 08-30-2012 |
20120219042 | Transmission Modes and Signaling for Uplink MIMO Support or Single TB Dual-Layer Transmission in LTE Uplink - This invention is a method of mapping data in a wireless communication system. The method includes forming a first frame having plural positions at a first transmitter. The first frame has a first plurality of reference signals. A second frame having plural positions corresponding to the plural positions of the first frame is formed at a second transmitter remote from the first transmitter. The second frame has a second plurality of reference signals. A plurality of data signals is inserted into the first frame at positions that are not occupied by either the first or second plurality of reference signals. The plurality of data signals is inserted into the second frame at positions that are not occupied by either the first or second plurality of reference signals. The first and second frames are transmitted to a remote receiver. | 08-30-2012 |
20120220286 | Periodic Channel Quality Indicator on Physical Uplink Control Channel for Carrier Aggregation - This application considers the need for enhancements to the baseline CSI reporting mechanisms including maximum payload size, CQI/PMI reporting configurations and CSI transmission in the event of collision between CSI reports from different CCs. | 08-30-2012 |
20120243500 | Multi-Cell Channel State Information-Reference Symbol Patterns for Long Term Evolution Extended Cyclic Prefix and Code Division Multiplexing-Time Multiplexing - This invention is a method of wireless communication using candidate multi-cell CSI-RS time-frequency patterns in the invention. This invention avoids collision with antenna ports 0, 1, 2 and 3 used for transmitting cell-specific reference signals and port 5 used for transmitting demodulation reference signals. This invention satisfies the nested property requirement. This invention avoids collision with DM-RS signal for extended cyclic prefix transmission as long as DMRS Rank is less than or equal to 2. For ranks greater than 2, this invention produces patterns that may collide with Rel. 10 DM-RS for extended CP. The invention includes alternative patterns obtained by relabeling and/or reshuffling the CSI-RS antenna port numbers while preserving identical time-frequency resources assigned to CSI-RS in the time-frequency grid. | 09-27-2012 |
20120270535 | Implicit CSI Feedback for DL Multiuser MIMO Transmission - This invention is method of implicit channel state information (CSI) feedback for multiuser multiple input, multiple output (MU-MIMO) communication between a base station (eNB) and a plurality of user equipment (UE). Each user equipment reporting a plurality of single user precoding matrix indicators (PMI) including a first PMI indicating a recommended optimum precoding matrix and at least one further PMI indicating information for beamforming at said base station. The base station communicates with each user equipment based on precoding matrix indicators received from the plurality of user equipment. | 10-25-2012 |
20120275400 | PHYSICAL DOWNLINK CONTROL CHANNEL AND PHYSICAL HYBRID AUTOMATIC REPEAT REQUEST INDICATOR CHANNEL ENHANCEMENTS - A wireless transmission system included at least one user equipment and a base station. The base station is operable to form a downlink control information block, modulate the downlink control information, precode the modulated downlink control information, and transmit the precoded, modulated downlink control information on at least one demodulation reference signal antenna port to the at least one user equipment. The precoded, modulated downlink control information is mapped to a set of N1 physical resource block pairs in a subframe from an orthogonal frequency division multiplexing symbol T | 11-01-2012 |
20120302250 | CONFIGURATION OF RANK INDICATOR REPORTING INSTANCES - A method for setting a periodicity and an offset in rank indicator (RI) reporting in a user equipment in a wireless communication system receives a radio resource control (RRC) signal from a base station, decodes a RI periodicity and offset configuration index, sets the periodicity and offset in accordance with said decoded periodicity and offset configuration index and reports a RI according to the set periodicity and offset. The periodicity is an integer and reporting a RI reports with equal the product of the periodicity and a period of reporting of the channel quality indicator (CQI) and the precoding matrix indicator (PMI). | 11-29-2012 |
20130170437 | NETWORK MIMO REPORTING, CONTROL SIGNALING AND TRANSMISSION - A coordinated multipoint transmitter is for use with a network MIMO super-cell and includes a coordination unit configured to provide joint link processing to coordinate a multipoint transmission corresponding to a set of transmission points. Additionally, the coordinated multipoint transmitter also includes a transmission unit configured to transmit the multipoint transmission using the set of transmission points. Additionally, a coordinated transmission receiver is for use with a network MIMO super-cell and includes a reception unit configured to receive a multipoint transmission corresponding to a set of transmission points. The coordinated transmission receiver also includes a processing unit configured to process the multipoint transmission from the set of transmission points. | 07-04-2013 |
20130201921 | Carrier Indication In a Bandwidth Aggregated Wireless Communications Systems - In this invention wireless communication of data between a user equipment and a base station including bandwidth aggregation of a plurality of component carriers, includes a first unit transmitting on a first component carrier a grant control signal the other unit specifying a second component carrier different to transmit the typically via a carrier indication field of 3 bits. The carrier indication field can be a one-to-one mapping to each possible second component carrier of a component carrier offset from an anchor carrier, which could be the first component carrier. | 08-08-2013 |
20130215835 | ON TRANSPARENCY OF CoMP - This invention is a technique for coordinate multi-point wireless transmission between plural base stations and user equipment. At least one base station transmits via a Physical Downlink Shared CHannel (PDSCH). The user equipment does not know the identity of the plural base stations. This could include joint transmission by simultaneous data transmission from multiple base stations. This could include dynamic point selection by data transmission from one base station at a time and changing the transmitting point (TP) from one subframe to another subframe. This could include coordinated scheduling/beamforming (CS/CB) where data is transmitted to the user equipment from one base station at a time and the base stations communicate to coordinate user scheduling and beamforming. The transmission point (TP) could vary over Resource Block (RB) pairs within a subframe while never transmitting from more than one base station. The transmission point (TP) could change in a semi-static fashion. | 08-22-2013 |
20130230118 | PRECODING CODEBOOK DESIGN FOR SINGLE USER MIMO - A transmitter is for use with multiple transmit antennas and includes a precoder unit configured to precode data for a transmission using a precoding matrix selected from a codebook, wherein the codebook corresponds to the following three transmission properties for an uplink transmission: 1) all precoding elements from the precoding matrix have a same magnitude, 2) each precoding element from the precoding matrix is taken from a set of finite values and 3) there is only one non-zero element in any row of the precoding matrix. The transmitter also includes a transmit unit configured to transmit the precoded data. | 09-05-2013 |
20140050201 | JOINT PROCESSING DOWN LINK COORDINATED MULTI-POINT REFERENCE SIGNAL SUPPORT - This invention concerns multiplexing in Long Term Evolution (LTE) and Long Term Evolution-Advanced (LTE-A) in Evolved Universal Terrestrial Radio Access Network (E-UTRAN) wireless telephony. Joint processing down link coordinated multi-point reference signaling includes combining resource signal types at a user equipment, determining conflicts between resource signals of plural user equipment, puncturing resource signals of other cell upon determining conflicts between resource signals of plural user equipment and transmitting non-punctured combined resource signals from a user equipment. | 02-20-2014 |
20140169287 | MULTI-RANK PRECODING MATRIX INDICATOR (PMI) FEEDBACK IN A MULTIPLE-INPUT MULTIPLE-OUTPUT (MIMO) SYSTEM - In at least some embodiments, a system includes a multiple-input multiple-output (MIMO) base station and a plurality of MIMO user equipment (UE) devices in communication with the MIMO base station. The MIMO base station is configured to switch between a single-user (SU)-MIMO mode and a multiple-user (MU)-MIMO mode during communications with the plurality of MIMO UE devices based on multi-rank precoding matrix indicator (PMI) feedback received from at least one of the MIMO UE devices. | 06-19-2014 |
20140219218 | DOWNLINK 8 TX CODEBOOK SUB-SAMPLING FOR CSI FEEDBACK - This invention is codebook sub-sampling of the reporting of RI, CQI, W1 and W2. If CSI mode 1 is selected RI and W1 are jointly encoded using codebook sub-sampling in report 1. If CSI mode 2 is selected W1 and W2 are jointly encoded using codebook sub-sampling in report 2. | 08-07-2014 |
20140219219 | DOWNLINK 8 TX CODEBOOK SUB-SAMPLING FOR CSI FEEDBACK - This invention is codebook sub-sampling of the reporting of RI, CQI, W1 and W2. If CSI mode 1 is selected RI and W1 are jointly encoded using codebook sub-sampling in report 1. If CSI mode 2 is selected W1 and W2 are jointly encoded using codebook sub-sampling in report 2. | 08-07-2014 |
20140233498 | MULTIPLE CQI FEEDBACK FOR CELLULAR NETWORKS - Single user and multiuser MIMO transmission in a cellular network may be performed by a base station (eNB) transmitting either one or two transmission layers. A user equipment (UE) receives a reference symbol from the base station. The UE processes the reference symbol with one or more of a plurality of preceding matrices to form a plurality of channel quality indices (CQI). The UE provides feedback to the eNB comprising one or more feedback CQI selected from the plurality of CQI and one or more preceding matrix indicators (PMI) identifying the one or more preceding matrices used to form each of the one or more feedback CQIs, wherein at least two PMI are included in the feedback. | 08-21-2014 |
20140247767 | CHANNEL QUALITY REPORT PROCESSES, CIRCUITS AND SYSTEMS - Coordinated multi-point (CoMP) transmissions in a cellular network is performed using multi-broadcast single frequency network (MBSFN) subframes. During CoMP transmission, demodulation reference signals (DRS) are placed in the one portion the MDSFN subframe, while cell-specific reference signals (CRS) are placed in a separate portion of the MDSFN subframe. Therefore, no CRS-DRS collision will occur during CoMP transmission. | 09-04-2014 |
20140270011 | PSEUDORANDOM SEQUENCE GENERATION FOR OFDM CELLULAR SYSTEMS - In one embodiment, a transmitter includes a binary sequence generator unit configured to provide a sequence of reference signal bits, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to the transmitter and one or more time indices of the sequence. The transmitter also include a mapping unit that transforms the sequence of reference signal bits into a complex reference signal, and a transmit unit configured to transmit the complex reference signal. In another embodiment, a receiver includes a receive unit configured to receive a complex reference signal and a reference signal decoder unit configured to detect a sequence of reference signal bits from the complex reference signal, wherein the sequence is an inseparable function of a cell identification parameter, a cyclic prefix mode corresponding to a transmitter and one or more time indices of the sequence. | 09-18-2014 |
20140362769 | Network Signaling for Network-Assisted Interference Cancellation and Suppression - Embodiments of the invention are directed to a cellular communication network that can determine whether communications between one base station-UE pair may interfere with another UE that is in the same cell or a different cell. The network identifies interference parameters associated with interference signals that may be received by a UE. The interference signals may be generated by the base station itself, such as communications with other UEs, or by a neighboring base station. The base station transmits the interference parameters to the UE. The UE receives the one or more parameters comprising information about signals expected to cause intra-cell or inter-cell interference. The UE then processes received signals using the one or more parameters to suppress the intra-cell or inter-cell interference. | 12-11-2014 |
20140362818 | BACKWARD COMPATIBLE BANDWIDTH EXTENSION - A transmitter includes a bandwidth configuration unit configured to provide an increased system bandwidth corresponding to a bandwidth extension over multiple component carriers Additionally, the transmitter also includes a transmit unit configured to employ the bandwidth extension. | 12-11-2014 |
20140362943 | RANK AND PMI IN DOWNLOAD CONTROL SIGNALING FOR UPLINK SINGLE-USER MIMO (UL SU-MIMO) - A method of operating a user equipment device includes extracting at least one rank indicator (RI) from an uplink grant, and adapting a transmission rank in response to said RI. At least two transmit antennas are configured to transmit according to said transmission rank. | 12-11-2014 |
20150016577 | ANTENNA GROUPING AND GROUP-BASED ENHANCEMENTS FOR MIMO SYSTEMS - Embodiments of the present disclosure provide a transmitter, a receiver and methods of operating a transmitter and a receiver. In one embodiment, the transmitter has at least three transmit antennas and includes a feedback decoding portion configured to recover at least one group-based channel quality indicator provided by a feedback signal from a receiver, wherein each group-based channel quality indicator corresponds to one of a set of transmission layer groupings. The transmitter also includes a modulator portion configured to generate at least one symbol stream and a mapping portion configured to multiplex each symbol stream to at least one transmission layer grouping. The transmitter further includes a pre-coder portion configured to couple the transmission layers to the transmit antennas for a transmission. The receiver includes a decoder portion which is configured to use decoded signals from at least one group to decode the other groups. | 01-15-2015 |
20150030058 | CQI FEEDBACK FOR MIMO DEPLOYMENTS - The present disclosure provides a receiver, a transmitter and methods of operating a receiver and a transmitter. In one embodiment, the receiver includes a receive portion employing transmission signals from a transmitter, having multiple transmit antennas, that is capable of transmitting at least one spatial codeword and adapting a transmission rank. The receiver also includes a feedback generator portion configured to provide a channel quality indicator that is feedback to the transmitter, wherein the channel quality indicator corresponds to at least one transmission rank. | 01-29-2015 |
20150055724 | TRANSMISSION MODES AND SIGNALING FOR UPLINK MIMO SUPPORT OR SINGLE TB DUAL-LAYER TRANSMISSION IN LTE UPLINK - An apparatus for mapping data in a wireless communication system. The apparatus includes circuitry for generating a precoding matrix for multi-antenna transmission based on a precoding matrix indicator (PMI) feedback from at least one remote receiver where the PMI indicates a choice of precoding matrix derived from a matrix multiplication of two matrices from a first code book and a second codebook. The apparatus further includes circuitry for precoding one or more layers of a data stream with the precoding matrix and transmitting the precoded layers of data stream to the remove receiver. | 02-26-2015 |