| Patent application number | Description | Published |
|---|
| 20080212701 | METHOD AND APPARATUS FOR TRANSMITTING CONTROL SIGNALING FOR MIMO TRANSMISSION - A method and apparatus for processing multiple-input multiple-output (MIMO) transmission are disclosed. A wireless transmit/receive unit (WTRU) receives downlink control information including WTRU-specific MIMO and transport format information and MIMO information for all other WTRUs assigned to the same resource. The WTRU processes received MIMO data based on the downlink control information. The downlink control information may also include transport format information for all other WTRUs assigned to the same RB. The downlink control information may be transmitted via WTRU-specific control signaling. All WTRUs' MIMO and/or transport format information may be transmitted via resource-specific common control signaling. The downlink control signaling format may include at least one of a number of streams for the WTRU, a number of active WTRUs assigned to the same resource, a spatial channel identity for the WTRU, a MIMO mode, a precoding matrix index and a precoding vector index. | 09-04-2008 |
| 20080212702 | PRECODED PILOT TRANSMISSION FOR MULTI-USER AND SINGLE USER MIMO COMMUNICATIONS - The disclosed method and apparatus include an WTRU-specific reference signal scheme that provides efficient precoded pilot transmission and effective channel estimation using dedicated pilot signals. The disclosed methods are efficient for both a single user (SU) and a multi user (MU) Multiple Input Multiple Output (MIMO) system. | 09-04-2008 |
| 20080232493 | COMBINED PRECODING VECTOR SWITCH AND FREQUENCY SWITCH TRANSMIT DIVERSITY FOR SECONDARY SYNCHRONIZATION CHANNEL IN EVOLVED UTRA - A method of providing transmit diversity for a secondary synchronization channel (S-SCH) includes generating a S-SCH signal, performing a frequency switched transmit diversity (FSTD) process on the S-SCH signal to create a first processed signal, performing a precoding vector switching (PVS) process on the first processed signal to create a processed S-SCH signal, and transmitting the processed S-SCH signal. | 09-25-2008 |
| 20080232494 | MIMO WIRELESS COMMUNICATION METHOD AND APPARATUS FOR TRANSMITTING AND DECODING RESOURCE BLOCK STRUCTURES BASED ON A DEDICATED REFERENCE SIGNAL MODE - The transmission and decoding of resource blocks (RBs) transmitted via a multiple-input multiple-output (MIMO) antenna having a plurality of transmit antennas is disclosed. Each RB includes a plurality of resource elements (REs). Each RE is reserved for one of a common reference signal (CRS) associated with one of the transmit antennas, a dedicated reference signal (DRS) including a single beamformed or precoded pilot, a DRS including a composite beamformed or precoded pilot, and a data symbol. Each RB may include a “control type” data symbol that indicates a DRS mode associated with the RB. In one DRS mode, each DRS includes a single beamformed or precoded pilot. In another DRS mode, each DRS includes a composite beamformed or precoded pilot. In yet another DRS mode, single beamformed or precoded pilots, and composite beamformed or precoded pilots, may coexist and be transmitted simultaneously within the same RBs or in different RBs. | 09-25-2008 |
| 20080233902 | METHOD AND APPARATUS FOR COMMUNICATING PRECODING OR BEAMFORMING INFORMATION TO USERS IN MIMO WIRELESS COMMUNICATION SYSTEMS - Methods and apparatus for communicating precoding or beamforming information to users are disclosed. A feedback signal including a reported preceding matrix index (PMI) is received and a determination made as to the state of the feedback. Precoding rules associated with the determined state are then used to select a precoding matrix. The state information is transmitted to a wireless transmit receive unit (WTRU), which uses the state information and the precoding rules associated therewith to select the precoding matrix used to precoded a received precoded data signal. | 09-25-2008 |
| 20080260054 | METHOD AND APPARATUS FOR REDUCING A PEAK-TO-AVERAGE POWER RATIO IN A MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM - A method and apparatus for reducing a peak-to-average power ratio (PAPR) in a multiple-input multiple-output (MIMO) wireless communication system are disclosed. Transmit beamforming or precoding is performed on transmit symbols based on a channel matrix. For feedback, channel matrices may be averaged over multiple subcarriers and the averaged channel matrices may be further quantized. In order to reduce the PAPR, amplitude clipping may be performed on the symbols after the transmit processing. The amplitude clipping may be performed by hard clipping, soft clipping, or smooth clipping. | 10-23-2008 |
| 20080260059 | METHOD AND APPARATUS FOR EFFICIENT PRECODING INFORMATION VALIDATION FOR MIMO COMMUNICATIONS - A method and apparatus for efficient precoding matrix verification in a multiple-input multiple-output MIMO wireless communication system are disclosed. A wireless transmit/receive unit WTRU sends a precoding matrix index PMI to an eNodeB. The eNodeB sends a verification message including a PMI indicator indicating whether or not the PMI of the WTRU and a PMI of the eNodeB are identical. If the PMI of the WTRU and of the eNodeB are identical, the eNodeB sends just a PMI indicator otherwise the eNodeB sends to the WTRU a PMI indicator and the PMI of the eNodeB. A plurality of PMIs may be sent simultaneously, and the PMIs may be partitioned into a plurality of groups. The PMI indicator may be either attached to or inserted into control signaling. PMI validation messages can be signaled to WTRU by control signaling or use of a dedicated reference signal. | 10-23-2008 |
| 20080279156 | ORTHOGONAL HADAMARD CODE BASED SECONDARY SYNCHRONIZATION CHANNEL - A secondary synchronization channel (S-SCH) for E-UTRA downlink is applied to any orthogonal frequency division multiple access (OFDMA) based system to reduce interference on S-SCHs among sectors of the same Node-B in an evolved universal terrestrial radio access (E-UTRA) system. | 11-13-2008 |
| 20080285512 | METHOD AND APPARATUS FOR REDUCING MODULATION, CODING AND TRANSPORT BLOCK INFORMATION SIGNALING OVERHEAD - A method and apparatus for reducing modulation and coding scheme (MCS) signaling overhead includes receiving a channel quality indicator (CQI) feedback. It is determined if there is a CQI feedback error. An MCS indicator is transmitted based upon the CQI feedback error determination. | 11-20-2008 |
| 20080316935 | GENERATING A NODE-B CODEBOOK - A method and apparatus generates a codebook and associated scheduling and control signaling. A plurality of channel combinations is generated for a plurality of wireless transmit receive units (WTRUs). The channel for each WTRU is quantized based on the WTRU codebook. A codebook for beamforming is generated for a plurality of WTRUs. The codebook includes a plurality of beamforming matrices. All possible beamforming matrices may be computed and the codebook may be quantized. | 12-25-2008 |
| 20090003474 | CONSTANT MODULUS MIMO PRECODING FOR CONSTRAINING TRANSMIT ANTENNA POWER FOR DIFFERENTIAL FEEDBACK - A method and apparatus for constraining power amplifier (PA) imbalance includes using a constant modulus (CM) criterion to ensure PA balance when using differential feedback. | 01-01-2009 |
| 20090006925 | FEEDBACK SIGNALING ERROR DETECTION AND CHECKING IN MIMO WIRELESS COMMUNICATION SYSTEMS - A method of feedback in a wireless transmit receive unit includes providing a precoding matrix index (PMI), error checking the (PMI) to produce an error check (EC) bit, coding the PMI and the EC bit and transmitting the coded PMI and EC bit. | 01-01-2009 |
| 20090023451 | WIRELESS COMMUNICATION METHOD AND APPARATUS FOR ENCODING AND DECODING BEAMFORMING VECTORS - A wireless communication method and apparatus for encoding and decoding beamforming vectors are disclosed. A base station sends explicit signaling for a beamforming vector of a wireless transmit/receive unit (WTRU) and implicit signaling for beamforming vectors of interfering WTRUs. Each WTRU uses its own beam forming vector to estimate the beamforming vectors of each of the other WTRUs. | 01-22-2009 |
| 20090046801 | METHOD AND APPARATUS FOR CREATING A MULTI-USER MIMO CODEBOOK USING A SINGLE USER MIMO CODEBOOK - A wireless communication method and apparatus for creating a codebook in a multiple input/multiple output (MIMO) wireless communication system are disclosed. The method includes adapting a single user codebook, wherein the single user codebook comprises a plurality single user beamforming vectors, into a multi-user codebook, wherein the multi-user codebook comprises a plurality of multi-user beamforming vectors. The method further includes grouping the codebook into a plurality of unitary matrices, selecting a plurality of beamforming vectors from the plurality of unitary matrices, forming a rank specific code-book from the beamforming vectors and the unitary matrices, and selecting a subset of a total number of pairs to form the plurality of unitary matrices. | 02-19-2009 |
| 20090060007 | Fast joint detection base station - A code division multiple access base station receives K data signals over a shared spectrum. The base station receives and samples a combined signal having the K transmitted data signals. A combined channel response matrix is produced. A block column of a cross correlation matrix is determined using the combined channel response matrix. Each block entry of the block column is a K by K matrix. Each block entry of the block column is a K by K matrix. A fourier transform of a complex conjugate transpose of the combined channel response matrix multiplied to the combined signal samples is taken. An inverse of a fourier transform of each block entry is multiplied to a result of the fourier transform to produce a fourier transform of the data vector. An inverse fourier transform of the data vector fourier transform is taken to produce data of the K signals. | 03-05-2009 |
| 20090067387 | WIRELESS USER EQUIPMENT FOR USE IN REDUCING CROSS CELL INTERFERENCE - A method for reducing cross cell interference in a wireless time division duplex communication system using code division multiple access, the system having at least one user equipment (UE) and a base station (BS) is disclosed. The method begins by measuring an interference level of each timeslot at the BS. A timeslot is eliminated for additional uplink communication if the measured interference level exceeds a first threshold. UEs in nearby cells that are large interferers are identified and their downlink timeslot usage is gathered. A timeslot is eliminated for uplink communication for a large interferer UE that uses the timeslot for downlink communication. | 03-12-2009 |
| 20090093221 | METHOD AND APPARATUS FOR SIGNALING INTERFERENCE INFORMATION FOR MULTI-USER MIMO - A method and apparatus for signaling interference information in a multi-user multiple-input multiple-output (MU-MIMO) system including a plurality of wireless transmit/receive units (WTRUs) and a base station are disclosed. The method includes the base station signaling interference information including rank information or a number of WTRUs to a particular WTRU based on beamforming vector feedback information received from the WTRUs. In order to reduce the downlink signaling overhead, confirmation of the beamforming vector feedback from WTRUs is used. The interference beamforming vectors and rank information or the number of WTRUs can be signaled separately or jointly. | 04-09-2009 |
| 20090116570 | METHOD AND APPARATUS FOR GENERATING CHANNEL QUALITY INDICATOR, PRECODING MATRIX INDICATOR AND RANK INFORMATION - A method and apparatus for generating channel quality indicator (CQI), precoding matrix indicator (PMI) and rank information are disclosed. The method and apparatus reduces feedback overhead and defines differential CQI information in an orthogonal frequency division multiplex (OFDM) symbol. | 05-07-2009 |
| 20090257408 | METHOD FOR TRANSMISSION TIME INTERVAL BUNDLING IN THE UPLINK - A method and apparatus for supporting uplink Transmission Time Interval (TTI) bundling in Long Term Evolution (LTE) is provided. Described are related method and apparatus for signaling, activation/deactivation and wireless transmit/receive unit (WTRU) behavior. | 10-15-2009 |
| 20090323773 | METHOD AND APPARATUS FOR SIGNALING PRECODING VECTORS - Methods for signaling precoding matrices used at the Node-B for data transmission with multiple user-multiple in multiple out (MU-MIMO) wireless communications. Precoding vectors may be efficiently signaled between wireless transmit/receive units and base stations using control channels, reference signals and blind detection of the precoding information. | 12-31-2009 |
| 20090323849 | METHOD AND APPARATUS FOR PERFORMING MULTIPLE-INPUT MULTIPLE-OUTPUT WIRELESS COMMUNICATIONS - A method and an apparatus for performing multiple-input multiple-output (MIMO) wireless communications are disclosed. A Node-B may receive an index to a pre-coding matrix in a single user MIMO (SU-MIMO) pre-coding codebook from wireless transmit/receive units (WTRUs) and adaptively perform one of SU-MIMO or multi-user MIMO (MU-MIMO) based on a predetermined criterion. Channel information for performing MU-MIMO may be obtained based on the pre-coding matrix of the SU-MIMO pre-coding codebook. A rank requested by the WTRU may be overridden if the unitary MU-MIMO codebook is a subset of the SU-MIMO pre-coding codebook. If not, a MU-MIMO pre-coding matrix with a largest correlation to the pre-coding matrix may be selected. A WTRU may send a pre-coding matrix for transmission to the WTRU along with a preferred interference matrix. A WTRU may send rank information and multiple right singular vectors for MU-MIMO. | 12-31-2009 |
| 20100002598 | METHOD AND APPARATUS FOR MEASURING AND REPORTING A RANK AND A PRECODING MATRIX FOR MULTIPLE-INPUT MULTIPLE-OUTPUT COMMUNICATION - A method and apparatus for measuring and reporting a rank and/or a precoding matrix for multiple-input multiple-output (MIMO) communication are disclosed. A metric indicating a channel condition is measured and a rank is selected based on the metric. The metric may be a signal-to-interference and noise ratio (SINR), throughput, a block error rate (BLER), system capacity, a sum rate, or the like. An SINR for each radio block group (RBG) for each rank is calculated. A data rate is calculated for each RBG based on the SINR for each rank. An overall rate for all RBGs is calculated for each rank. At least one rank is selected based on the overall rate. At least one precoding matrix may be selected jointly with or separately from the at least one rank. | 01-07-2010 |
| 20100002664 | METHOD AND APPARATUS FOR AVOIDING A COLLISION BETWEEN A SCHEDULING REQUEST AND A PERIODIC RANK INDICATOR REPORT OR A PERIODIC CHANNEL QUALITY INDICATOR/PRECODING MATRIX INDICATOR REPORT - A method and apparatus are described for avoiding a collision between a scheduling request (SR) and a periodic rank indicator (RI) report or a periodic channel quality indicator (CQI)/precoding matrix indicator (PMI) report. | 01-07-2010 |
| 20100074207 | METHOD FOR SIGNALING MU-MIMO PARAMETERS - Methods for signaling multi-user multiple-input multiple output (MU-MIMO) parameters for Evolved-UTRA (E-UTRA) are disclosed. Example signaling format methods are presented that allow use of distributed virtual resource blocks (DVRB) or support of four wireless transmit/receive units (WTRUs) but maintaining a predetermined signal format size. A signaling format is also presented that signals transmission precoding matrix indexes used by all co-scheduled WTRUs. | 03-25-2010 |
| 20100097937 | METHOD AND APPARATUS FOR WIRELESS TRANSMIT/RECEIVE UNIT SPECIFIC PILOT SIGNAL TRANSMISSION AND WIRELESS TRANSMIT/RECEIVE UNIT SPECIFIC PILOT SIGNAL POWER BOOSTING - A method and apparatus are described for providing improved channel estimation for wireless transmit/receive units (WTRUs) that require improved channel estimation (e.g., cell edge WTRUs) by allocating additional resource elements (REs) as pilot signals to improve channel estimation. These additional REs may be allocated to be used with expanded reference signals (ERSs). | 04-22-2010 |
| 20100098012 | UPLINK CONTROL INFORMATION TRANSMISSION METHODS FOR CARRIER AGGREGATION - A method and apparatus for transmitting uplink control information (UCI) for Long Term Evolution-Advanced (LTE-A) using carrier aggregation is disclosed. Methods for UCI transmission in the uplink control channel, uplink shared channel or uplink data channel are disclosed. The methods include transmitting channel quality indicators (CQI), precoding matrix indicators (PMI), rank indicators (RI), hybrid automatic repeat request (HARQ) acknowledgement/non-acknowledgement (ACK/NACK), channel status reports (CQI/PMI/RI), source routing (SR) and sounding reference signals (SRS). In addition, methods for providing flexible configuration in signaling UCI, efficient resource utilization, and support for high volume UCI overhead in LTE-A are disclosed. | 04-22-2010 |
| 20100158147 | UPLINK POWER HEADROOM REPORTING FOR CARRIER AGGREGATION - A method for reporting power headroom is disclosed. Power headroom may be reported across all carriers (wideband), for a specific carrier, or for a carrier group. The formula used to calculate the power headroom depends on whether the carrier (or a carrier in the carrier group) has a valid uplink grant. If the carrier or carrier group does not have a valid uplink grant, the power headroom may be calculated based on a reference grant. The power headroom is calculated by a wireless transmit/receive unit and is reported to an eNodeB. | 06-24-2010 |
| 20100215011 | METHOD AND APPARATUS FOR SWITCHING A RESOURCE ASSIGNMENT MODE FOR A PLURALITY OF COMPONENT CARRIERS - Techniques for configuring and switching a resource assignment mode for a plurality of component carriers are disclosed. A wireless transmit/receive unit (WTRU) has a capability of supporting multiple resource assignment modes such that a resource assignment mode is configured for a plurality of component carriers that are allocated for the WTRU, and the WTRU attempts to decode a control channel based on the configured resource assignment mode. The resource assignment mode may be configured for the WTRU via higher layer signaling. The resource assignment mode may be specific to the WTRU, or specific to a component carrier or a group of component carriers. The resource assignment mode may be configured separately for a downlink component carrier and an uplink component carrier. The resource assignment mode includes a separate assignment mode with component carrier indication, a separate assignment mode without component carrier indication, or a joint assignment mode. | 08-26-2010 |
| 20100232382 | METHOD AND APPARATUS FOR SELECTING AND RESELECTING AN UPLINK PRIMARY CARRIER - A method and apparatus are described for using an uplink (UL) primary carrier for long term evolution-advanced (LTE-A) to support hybrid automatic repeat request (HARQ) feedback, a channel quality indicator (CQI), a scheduling request (SR), power headroom, and at least one buffer status report in the context of asymmetrical deployment and symmetrical deployment. | 09-16-2010 |
| 20100239040 | DATA AND CONTROL MULTIPLEXING FOR UPLINK MIMO WITH CARRIER AGGREGATION AND CLUSTERED-DFT - A method and apparatus for signal processing in a wireless transmit receive unit (WTRU), including generating a plurality of data bits and a plurality of control bits, mapping the data bits and control bits to one or more codewords, multiplexing the data bits and control bits, dividing the bits into layers, allocating control bits to each layer based on a channel quality of each codeword and a channel quality of each layer, and channel interleaving each layer for output to one or more antennas. | 09-23-2010 |
| 20100246561 | METHOD AND APPARATUS FOR POWER CONTROL OF SOUNDING REFERENCE SIGNAL (SRS) TRANSMISSION - Methods and apparatus for sounding reference signal (SRS) power control for a wireless transmitter/receiver unit (WTRU) are disclosed. These methods and apparatus include methods and apparatus for carrier-specific and carrier-common SRS power control in WTRUs that utilize carrier aggregation techniques. These methods and apparatus also include methods and apparatus for SRS power control in WTRUs utilizing both carrier aggregation and time division multiplexing (TDM) techniques. Additionally, these methods and apparatus include methods and apparatus for SRS power control for WTRUs utilizing multiple input multiple output MIMO operation. Methods and apparatus for SRS overhead reduction and power management in a WTRU are also disclosed. | 09-30-2010 |
| 20100246705 | METHOD AND APPARATUS FOR UPLINK POWER CONTROL IN MULTIPLE-INPUT MULTIPLE-OUTPUT - A method and apparatus for uplink power control in multiple-input multiple-output (MIMO) includes setting a transmit power level for a physical uplink shared channel (PUSCH) transmission. | 09-30-2010 |
| 20100254329 | UPLINK GRANT, DOWNLINK ASSIGNMENT AND SEARCH SPACE METHOD AND APPARATUS IN CARRIER AGGREGATION - Methods of mapping, indicating, encoding and transmitting uplink (UL) grants and downlink (DL) assignments for wireless communications for carrier aggregation are disclosed. Methods to encode and transmit DL assignments and UL grants and map and indicate the DL assignments to DL component carriers and UL grants to UL component carriers are described. Methods include specifying the mapping rules for DL component carriers that transmit DL assignment and DL component carriers that receive physical downlink shared channel (PDSCH), and mapping rules for DL component carriers that transmit UL grants and UL component carriers that transit physical uplink shared channel (PUSCH) when using separate coding/separate transmission schemes. | 10-07-2010 |
| 20100271970 | METHOD AND APPARATUS FOR TRANSMITTING UPLINK CONTROL INFORMATION FOR CARRIER AGGREGATED SPECTRUMS - Methods and apparatus for transmitting uplink control information (UCI) in carrier aggregated spectrums are disclosed. UCI may include, but is not limited to, Precoding Matrix Indicator (PMI), Rank Indication (RI), Channel Quality Indicator (CQI), Acknowledge/Not Acknowledge (ACK/NACK) and Scheduling Request (SR). For symmetric carrier aggregation, uplink (UL) and downlink (DL) component carriers may be paired and use physical uplink control channel (PUCCH) in each UL component carrier to send UCI for the corresponding DL component carrier. For asymmetric carrier aggregation, methods are provided for UCI transmission and resource allocation depending on component carrier configuration or assignment. Methods are provided for multiple and single component carrier configurations that may further provide backward compatibility. | 10-28-2010 |
| 20100272048 | METHOD AND APPARATUS FOR SENDING HYBRID AUTOMATIC REPEAT REQUEST FEEDBACK FOR COMPONENT CARRIER AGGREGATION - Techniques for sending hybrid automatic repeat request (HARQ) feedback for transmissions received via a plurality of aggregated component carriers are disclosed. A wireless transmit/receive unit (WTRU) receive a plurality of codewords via a plurality of component carriers and decodes the codewords. The component carriers are grouped into a plurality of groups, and the WTRU may generate a bundled positive/negative acknowledgement (ACK/NACK) for each group of component carriers. The WTRU may be assigned a plurality of uplink control channel resources and may implement a channel selection scheme for indicating the ACK/NACKs. The WTRU selects one of the uplink control channel resources, and sets the HARQ feedback based the ACK/NACKs or bundled ACK/NACKs in a way that a different uplink control channel resource is selected and HARQ feedback bits are set differently based on the ACK/NACKs or bundled ACK/NACKs. Each physical uplink control channel (PUCCHs) may be mapped to a particular antenna. | 10-28-2010 |
| 20100303011 | METHOD AND APPARATUS FOR COMPONENT CARRIER AGGREGATION IN WIRELESS COMMUNICATIONS - A wireless transmit/receive unit (WTRU) receives a downlink subframe having multiple component carriers, each component carrier having control information encoded in a physical data control channel (PDCCH). The WTRU performs a blind decoding of control information in a first PDCCH located within a first component carrier to obtain a location of a second PDCCH located within a second component carrier, where the location of the second PDCCH is relative to a location of the first PDCCH as control channel element offset. The WTRU decodes the second PDCCH at the obtained location. | 12-02-2010 |
| 20100303039 | METHOD AND APPARATUS FOR PERFORMING COMPONENT CARRIER-SPECIFIC RECONFIGURATION - Techniques for component carrier-specific reconfiguration are disclosed. A wireless transmit/receive unit (WTRU) is capable of transmitting or receiving via multiple component carriers. The WTRU may perform component carrier reconfiguration on a component carrier basis to add, remove or replace a component carrier. Discontinuous reception (DRX) and/or discontinuous transmission (DTX) may be performed on at least one component carrier, wherein DRX and/or DTX patterns on the component carriers may not overlap each other. A random access procedure may be performed at the target cell on one component carrier while other component carriers are inactive. The component carrier-specific reconfiguration or handover of a component carrier or a channel may be implemented in coordinated multiple point transmission (CoMP), wherein a handover of a control channel, not a traffic channel, may be performed. Alternatively, a handover of a traffic channel may be performed. | 12-02-2010 |
| 20110002281 | DISCONTINUOUS RECEPTION FOR CARRIER AGGREGATION - Discontinuous reception (DRX) operations for wireless communications implementing carrier aggregation are disclosed. Physical downlink control channel implementation for carrier aggregation is also disclosed. DRX methods are disclosed including a common DRX protocol that may be applied across all component carriers, an individual/independent DRX protocol that is applied on each component carrier, and hybrid approaches that are applied across affected component carriers. Methods for addressing the effects of loss of synchronization on DRX, impact of scheduling request on DRX, uplink power control during DRX, and DRX operation in measurement gaps are disclosed. | 01-06-2011 |
| 20110038271 | APPARATUS AND METHOD FOR UPLINK POWER CONTROL FOR A WIRELESS TRANSMITTER/RECEIVER UNIT UTILIZING MULTIPLE CARRIERS - A method and apparatus for determining uplink power in a wireless transmit receive unit (WTRU). The WTRU operates in a carrier aggregated system. The WTRU is configured to receive a plurality of uplink power parameters indexed to one of a plurality of uplink carriers and receive a transmit power control command indexed to the one of the plurality of uplink carriers. The WTRU is configured to determine a pathloss of the one of the plurality of uplink carriers and determine a transmit power for the one of the plurality of uplink carriers based on the plurality of power parameters, the transmit power control command, and the pathloss. | 02-17-2011 |
| 20110142107 | Rank Adaptive Cyclic Shift for Demodulation Reference Signal - Systems and methods for generating a demodulation reference signal for use by user equipment configured with multiple antennas based on a rank of an antenna or an antenna port are disclosed. A rank for a user equipment device is determined indicating the number of spatial layers or antenna ports in use, and the value of the rank is used to generate a cyclic shift offset and a cyclic shift, that can then be used to generate a demodulation reference signal to be used in timeslots within each spatial layer of an uplink transmission. Orthogonal cover codes may be used in conjunction with a determined cyclic shift to generate a demodulation reference signal. | 06-16-2011 |
