Patent application number | Description | Published |
20080225960 | Generalized reference signaling scheme for MU-MIMO using arbitrarily precoded reference signals - A multi-user MIMO downlink beamforming system ( | 09-18-2008 |
20080227495 | Reference signaling scheme using compressed feedforward codebooks for MU-MIMO systems - A multi-user MIMO downlink beamforming system with limited feed forward ( | 09-18-2008 |
20080233964 | Uplink control channel allocation - Various methods of allocating uplink control channels in a communication system are implemented at a resource scheduler or a user equipment (UE). In one method the scheduler reserves resources for a downlink data channel and signals a corresponding downlink data channel grant and also reserves resources for a persistent uplink control channel for a longer duration than the data channel grant. Signaling overhead associated with a grant for this persistent uplink control channel is reduced over a full dynamic grant. A predetermined rule can be used at the scheduler and at the UE to avoid overhead signaling associated with a grant for this persistent control channel. Predetermined rules at the UE and scheduler can also be used to reserve appropriate resources and select appropriate MCS levels for control information and the control information and uplink data can be transported over a common uplink channel when a time overlap occurs between an uplink data channel and the persistent control channel. | 09-25-2008 |
20090028099 | DISTRIBUTED SCHEDULING METHOD FOR MULTI-ANTENNA WIRELESS SYSTEM - A channel allocation system for a beam-forming wireless network selects receivers to enroll in communication from a pool of candidate receivers, by off-loading a determination of the effects of adding each candidate receiver to the candidate receiver itself. In one embodiment, the candidate receivers nominate themselves for enrollment based on their determination of aggregate data rate changes resulting from their enrollment and the comparison of this aggregate data rate change against an estimate of the aggregate data rate changes of other candidate receivers. | 01-29-2009 |
20090190688 | Beamforming for Non-Collaborative, Space Division Multiple Access Systems - A wireless communication system noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine a weight vector w | 07-30-2009 |
20090313314 | TECHNIQUES FOR PERFORMING DISCRETE FOURIER TRANSFORMS ON RADIX-2 PLATFORMS - A technique for performing a discrete Fourier transform (DFT) includes storing, in a single-port memory, multiple signal points. A first group of consecutive ones of the multiple signal points are fetched (from a first line of the single-port memory) to a first input register associated with a processor that includes multiple arithmetic units (AUs) that are each configured to perform multiply accumulate (MAC) operations. A second group of consecutive ones of the multiple signal points are then fetched (from a second line of the single-port memory) to a second input register associated with the processor. Selected pairs of the multiple signal points are then loaded (one from each of the first and second input registers for each pair) into the multiple arithmetic units during an initial butterfly stage. Radix-2 butterfly operations are then performed on the selected pairs of the multiple signal points (using the multiple AUs) to provide respective output elements. | 12-17-2009 |
20100070551 | FOURIER TRANSFORM PROCESSING AND TWIDDLE FACTOR GENERATION - In a data processing system, having a twiddle factor unit, a method for performing a mixed-radix discrete Fourier transform (DFT) having a block size, N, and a maximum block size, Nmax, wherein the maximum block size includes a radix that is not a power of 2 is provided. The method includes receiving a delta value at an input of the twiddle factor unit, the delta value representing a ratio of a modified maximum bock size to the block size, wherein the modified maximum block size is a power of 2. The method further includes using the delta value to obtain a step size for generating indices of a look-up table stored within the twiddle factor unit, wherein the look-up table stores real and imaginary components of twiddle factors corresponding to a set of block sizes of the DFT. | 03-18-2010 |
20100183101 | TECHNIQUES FOR INCREASING DECODING RELIABILITY IN AN ADAPTIVE MINIMUM MEAN SQUARED ERROR WITH SUCCESSIVE INTERFERENCE CANCELLATION (MMSE/SIC) DECODER - A technique for increasing decoding reliability in an adaptive minimum mean squared error with successive interference cancellation (MMSE/SIC) decoder in a channel-coded multiple-input multiple-output (MIMO) communication system. A code block selector evaluates reliability metrics and determines whether the reliability metric of the decoded symbols of a particular indexed code block of a first code word satisfies a quality threshold. Depending upon this determination, a composite second code word is formed at each indexed code block using a previously calculated MMSE-LLR output of a second code word or a SIC-LLR output using the indexed symbols of a first code word. Composite second code word is decoded with increased accuracy. | 07-22-2010 |
20110019631 | Generalized Reference Signaling Scheme for MU-MIMO Using Arbitrarily Precoded Reference Signals - A multi-user MIMO downlink beamforming system ( | 01-27-2011 |
20120076032 | MULTI-USER MIMO-SDMA FOR FINITE RATE FEEDBACK SYSTEMS - A multi-user v downlink beamforming system with limited feedback ( | 03-29-2012 |
20120076033 | METHODS FOR OPPORTUNISTIC MULTI-USER BEAMFORMING IN COLLABORATIVE MIMO-SDMA - A system and method for opportunistically designing collaborative beamforming vectors is disclosed for a wireless multiple input, multiple output (MIMO) space division multiple access (SDMA) communication system by sequentially designing beamforming vectors for ranked channels in order to exploit the instantaneous channel conditions to improve per user average SNR performance. Each subscriber station independently transmits information to a base station that allows the base station to determine beamforming vectors for each subscriber station by ranking the subscriber stations by channel strength. Using sequential nullspace methods, the ranked channel matrices are then used to select the channel matrix H | 03-29-2012 |
20120114064 | Reference Signaling Scheme Using Compressed Feedforward Codebooks for MU-MIMO Systems - A multi-user MIMO downlink beamforming system with limited feed forward ( | 05-10-2012 |
20120314654 | MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) APPARATUS AND METHODS - A multi-user MIMO downlink beamforming system ( | 12-13-2012 |
20130016763 | BEAMFORMING FOR NON-COLLABORATIVE, SPACE DIVISION MULTIPLE ACCESS SYSTEMS - A wireless communication system noncollaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine a weight vector w | 01-17-2013 |
20140044215 | Block-Based Crest Factor Reduction - A method and apparatus for a radio base station ( | 02-13-2014 |
20140050274 | Generalized Reference Signaling Scheme for Multi-User Multiple Input, Multiple Output (MU-MIMO) using Arbitrarily Precoded Reference Signals - A multi-user MIMO downlink beamforming system is provided to enable transmit beamforming vectors to be efficiently provided to a subset of user equipment devices, where spatial separation or zero-forcing transmit beamformers (w | 02-20-2014 |
20140050275 | Reference Signaling Scheme using Compressed Feedforward Codebooks for MU-MIMO Systems - A multi-user MIMO downlink beamforming system with limited feed forward ( | 02-20-2014 |
20140079005 | Uplink Control Channel Allocation in a Communication System and Communicating the Allocation - Various methods of allocating uplink control channels in a communication system are implemented at a resource scheduler or a user equipment (UE). In one method the scheduler reserves resources for a downlink data channel and signals a corresponding downlink data channel grant and also reserves resources for a persistent uplink control channel for a longer duration than the data channel grant. Signaling overhead associated with a grant for this persistent uplink control channel is reduced over a full dynamic grant. A predetermined rule can be used at the scheduler and at the UE to avoid overhead signaling associated with a grant for this persistent control channel. Predetermined rules at the UE and scheduler can also be used to reserve appropriate resources and select appropriate MCS levels for control information and the control information and uplink data can be transported over a common uplink channel when a time overlap occurs between an uplink data channel and the persistent control channel. | 03-20-2014 |
20140095572 | Multiply and Accumulate Feedback - A method and apparatus may be used to evaluate a polynomial by initializing a multiply and accumulate feedback apparatus ( | 04-03-2014 |
20140126662 | Beamforming for Non-Collaborative, Space Division Multiple Access Systems - A wireless communication system non-collaborative, multiple input, multiple output (MIMO) space division multiple access (SDMA) system determines subscriber station combining and weighting vectors that yield a high average signal-to-interference plus noise ratio (SINR). Each subscriber station independently transmits information to a base station that allows the base station to determine a weight vector w | 05-08-2014 |
20140192915 | MULTI-USER MIMO-SDMA FOR FINITE RATE FEEDBACK SYSTEMS - A multi-user MIMO downlink beamforming system with limited feedback ( | 07-10-2014 |
20140207836 | Vector Comparator System for Finding a Peak Number - A comparator ( | 07-24-2014 |