Patent application number | Description | Published |
20080233965 | METHOD AND SYSTEM FOR ADAPTIVE ALLOCATION OF FEEDBACK RESOURCES FOR CQI AND TRANSMIT PRE-CODING - Aspects of a method and system for adaptive allocation of feedback resources for CQI and transmit pre-coding may include assigning a bandwidth and a feedback period to one or more CQI reporting units and a bandwidth and a feedback period to one or more PMI reporting units. One or more feedback messages may be generated based at least on channel state information associated with the bandwidth and the feedback period assigned to the one or more CQI reporting units and with the bandwidth and the feedback period assigned to the one or more PMI reporting units. The bandwidth and the feedback period of the CQI reporting units and/or the PMI reporting units may be adjusted dynamically and/or adaptively. Based on the channel state information or as a function of a feedback rate, the bandwidth and/or the feedback period may be assigned. | 09-25-2008 |
20080253478 | METHOD AND SYSTEM FOR RECONFIGURABLE SFBC/STBC IN A DIVERSITY TRANSMISSION SYSTEM - Aspects of a method and system for reconfigurable SFBC/STBC in a diversity transmission system are presented. Exemplary aspects of the system may include one or more circuits that enable generation of a plurality of codeword sequences based on a data sequence. In a diversity transmission system, the plurality of codeword sequences may be concurrently transmitted via at least a portion of a plurality of transmitting antennas. The concurrently transmitted codeword sequences may enable a diversity receiver to generate the data sequence. In a single input single output transmission system, one or more circuits may enable transmission of one of the plurality of codeword sequences via one of the plurality of transmitting antennas. The transmitted codeword sequence may enable a receiver to generate the data sequence. | 10-16-2008 |
20080273624 | METHOD AND SYSTEM FOR CQI/PMI FEEDBACK FOR PRECODED MIMO SYSTEMS UTILIZING DIFFERENTIAL CODEBOOKS - Aspects of a method and system for CQI/PMI feedback for precoded MIMO systems utilizing differential codebooks may include generating one or more feedback messages for one or more Channel Quality Indicator (CQI) reporting units based on at least channel state information associated with the one or more CQI reporting units. One or more differential feedback messages may be generated for one or more Pre-coding Matrix Index (PMI) reporting units based on at least channel state information associated with the one or more PMI reporting units, wherein the one or more PMI reporting units span a useable bandwidth. A bandwidth and a feedback period may be assigned to each of the one or more CQI reporting units and the one or more PMI reporting units to define the one or more CQI reporting units and the one or more PMI reporting units. | 11-06-2008 |
20080311873 | METHOD AND SYSTEM FOR SFBC/STBC IN A COMMUNICATION DIVERSITY SYSTEM USING ANGLE FEEDBACK - Aspects of a system for STBC/SFBC in a communication system using angle feedback may include a receiver, which enables reception of signals via a plurality of receiving antennas. The receiver may enable computation of a rotation factor value based on the received signals and utilization of the computed rotation factor value to receive subsequent signals via the plurality of receiving antennas. The received signals may comprise preamble data. The receiver may enable computation of channel estimate values based on the received preamble data. A rotation angle value may be computed based on the computed channel estimate values. The rotation factor value may be computed based on the computed rotation angle value. The receiver may enable transmission of feedback information comprising the computed rotation factor and/or the computed rotation angle. | 12-18-2008 |
20080317178 | METHOD AND SYSTEM FOR SFBC/STBC USING INTERFERENCE CANCELLATION - Aspects of a method and system for SFBC and/or STBC using interference cancellation are presented. Aspects of an exemplary system may enable rate | 12-25-2008 |
20090066577 | Method and System for Beamforming in a Multiple User Multiple Input Multiple Output (MIMO) Communication System Using a Codebook - A method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook may include a processor in a node B that enables generation of an interference cancellation matrix (W | 03-12-2009 |
20090074114 | Method and System for Approximate Maximum Likelihood (ML) Detection in a Multiple Input Multiple Output (MIMO) Receiver - Aspects of a method and system for approximate maximum likelihood (ML) detection in a multiple input multiple output (MIMO) receiver may comprise computing soft decision values for bits that may be decoded from a received signal vector by utilizing approximate ML detection. The soft decision values may be computed for at least a portion bits carried within a received signal vector by decomposing a candidate constellation vector into segments, with each dimension representing a spatial stream signal. After decomposition, soft decision values for at least a portion of the bits may be computed by selecting values in a search dimension and computing values in a plurality of slice dimensions. Values within the search dimension may be determined by selecting constellation points within a constellation map for the search dimension. Values within each slice dimension may be computed for each selected constellation point. | 03-19-2009 |
20090190691 | Method and System for Subspace Beamforming for Near Capacity Multiple Input Multiple Output (MIMO) Performance - Aspects of a system for subspace beamforming for near capacity MIMO performance may include a MIMO transmitter that computes one or more rotation angle values (θ | 07-30-2009 |
20090268833 | METHOD AND SYSTEM FOR PREDICTING CHANNEL QUALITY INDEX (CQI) VALUES FOR MAXIMUM LIKELIHOOD (ML) DETECTION IN A 2X2 MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) WIRELESS SYSTEM - Aspects of a method and system for predicting CQI values for ML detection in a 2×2 MIMO system are presented. In one aspect of the system, a CQI value for a MIMO communication system may be computed based on a computed channel realization by reverse mapping the computed channel realization to a corresponding CQI value. Based on the computed CQI value, a coding rate may be selected. The coding rate may be selected from a lookup table, wherein the computed CQI value is utilized as an index to the lookup table. The reverse mapping may utilize a function, which is computed using radial basis function networks. In another aspect of the system, a joint mutual information value may be computed for the MIMO communication system. The joint mutual information value may be computed based on a Shannon mutual information value and a matched filter mutual information value. | 10-29-2009 |
20090268834 | METHOD AND SYSTEM FOR PREDICTING CHANNEL QUALITY INDEX (CQI) VALUES FOR MAXIMUM LIKELIHOOD (ML) DETECTION IN A KXK MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) WIRELESS SYSTEM - Aspects of a method and system for predicting CQI values for ML detection in a K×K MIMO system are presented. In one aspect of the system, a CQI value for a K×K MIMO communication system may be computed by decomposing the K×K MIMO system into a series of 2×2 MIMO systems. For each 2×2 MIMO system a CQI value may be computed by reverse mapping a PER computed for the 2×2 MIMO system and an SNR value for a SISO communication system. By summing CQI values among the series of 2×2 MIMO systems a CQI value for the K×K MIMO system may be computed. Based on the computed CQI value for the K×K MIMO system, a coding rate may be selected. The selected coding rate may be selected to maximize a computed information throughput rate at a MIMO receiver that utilizes ML detection. | 10-29-2009 |
20110159866 | METHOD AND SYSTEM FOR COMMUNICATING FEEDBACK INFORMATION IN A MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT (MU-MIMO) COMMUNICATION SYSTEM - A method and system for communicating feedback information in a multiple user multiple input multiple output (MU-MIMO) communication system are presented. In one aspect of the method and system, a beamformer station may communicate a feedback information request to a plurality of beamformee stations. The feedback information request may request feedback data for a plurality of RF channel bands. The RF channel bands may form a multichannel. The beamformer may subsequently transmit a plurality of signals utilizing the RF channel bands within the multichannel. Each of the beamformees may receive the plurality of subsequently transmitted signals. A beamformee may generate the requested feedback data for each RF channel band within the multichannel. The beamformee may generate a beamforming report, which comprises the feedback data, which is generated across the plurality of RF channel bands in the multichannel. The beamformee may transmit the beamforming report to the beamformer. | 06-30-2011 |
20120082128 | METHOD AND SYSTEM FOR ADAPTIVE ALLOCATION OF FEEDBACK RESOURCES FOR CQI AND TRANSMIT PRE-CODING - In transmit pre-coding, a bandwidth and a feedback period to one or more CQI reporting units and a bandwidth and a feedback period to one or more PMI reporting units are assigned, respectively. Sub-divisions in time and/or frequency corresponding to the assigned bandwidths and the assigned feedback periods are dynamically adjusted based at least on uplink channel state information corresponding to the bandwidth and the feedback period assigned to the CQI reporting units, and the bandwidth and the feedback period assigned to the PMI reporting units. One or more feedback messages are generated based at least on the channel state information over the adjusted sub-divisions in time and/or frequency corresponding to the CQI reporting units and to the PMI reporting units, respectively. The bandwidth and/or the feedback period may be assigned based on the channel state information or as a function of a feedback rate. | 04-05-2012 |
20120106603 | METHOD AND SYSTEM FOR BEAMFORMING IN A MULTIPLE USER MULTIPLE INPUT MULTIPLE OUTPUT (MIMO) COMMUNICATION SYSTEM USING A CODEBOOK - A method and system for beamforming in a multiple user multiple input multiple output (MIMO) communication system using a codebook may include a processor in a node B that enables generation of an interference cancellation matrix (W | 05-03-2012 |
20140160957 | CHANNEL STATE INFORMATION CALIBRATION - A dedicated calibration device may be utilized by a wireless transceiver device, such as a base station, to compute compensation matrices. The wireless transceiver device and the dedicated calibration device can exchange training sequence signals. Based on the exchanged training sequence signals, the wireless transceiver device and the dedicated calibration device can estimate overall baseband to baseband channel responses taking into account the amplitude and phase responses of the respective transmit and receive radio chains, and the wireless transceiver device can determine the compensation matrices. Furthermore, the wireless transceiver device can estimate a baseband-to-baseband uplink channel response relative to actual user equipment, approximate a downlink channel response using only one of the determined compensation matrices, and perform beamforming to the actual user equipment using the approximated downlink channel response. | 06-12-2014 |
20140161205 | Reference Signal Design for Massive MIMO Communication - The present disclosure is directed to a system and method for extending a reference signal pattern to define additional reference signals using a phase division multiplexing (PDM) technique. The reference signal pattern can be a predefined reference signal pattern in a wireless communication standard and can be extended to support massive MIMO communication. | 06-12-2014 |
20140307702 | Massive MIMO (M-MIMO) Support for Heterogeneous Networks (HETNETS) - Systems and methods for enabling a wireless backhaul network between access points (APs) in a wireless network are provided. In an embodiment, the wireless backhaul network is enabled using a Massive Multiple Input Multiple Output (MIMO) radio access technology (RAT). In another embodiment, the wireless backhaul network is established using the same RAT as used by the APs to serve user devices, and can utilize the same time and frequency resources used for user communication. | 10-16-2014 |
20150043450 | Receiver-Aided Multi-User MIMO and Coordinated Beamforming - Embodiments include systems and methods for improving the beamforming efficiency of Multi-User Multiple Input Multiple Output (MU-MIMO) and/or Coordinate Beamforming (CB) in wireless multi-access networks. In one aspect, a receiver-aided approach for MU-MIMO and/or CB is provided. Unlike conventional MU-MIMO/CB operation which is transparent to the UE, the receiver-aided approach herein makes information about potential MU-MIMO and/or CB multi-user interference available to UEs being considered for MU-MIMO and/or CB transmission. As such, the UEs can provide Channel State Information (CSI) that is better tailored to actual data transmission conditions than in conventional operation, and the base station can make better decisions regarding MU-MIMO and/or CB operation, user selection, and transmission parameters (e.g., number of data streams, precoder matrix, etc.). | 02-12-2015 |
20150043480 | System and Method for Multi-Subframe Data Transmission - Systems and methods for multi-subframe data transmission are provided. A multi-subframe scheduling (MSS) downlink subframe is transmitted from a base station to a user equipment (UE). The MSS downlink subframe includes a control signal that describes consecutive data transmissions in the MSS downlink subframe and in a plurality of subsequent downlink subframes. The plurality of subsequent downlink subframes include no control information, thereby allowing for control signaling overhead to be reduced. | 02-12-2015 |