Patent application number | Description | Published |
20110080976 | 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. | 04-07-2011 |
20120269278 | DOWNLINK MULTIPLE INPUT MULTIPLE OUTPUT ENHANCEMENTS FOR SINGLE-CELL WITH REMOTE RADIO HEADS - A base station selects a subset of at least one geographically separated antennas for each of the plurality of user equipments. The base station forms at least layer of data stream including modulated symbols, precodes the data stream via multiplication with the NT-by-N precoding matrix where N is the number of said layers and NT is the number of transmit antenna elements and transmits the precoded layers of data stream to the user equipment via the selected geographically separated antennas. The base station signals the subset of the plurality of geographically separated antennas via higher layer Radio Resource Control or via a down link grant mechanism. The base station optionally does not signal the subset of the plurality of geographically separated antennas to the corresponding mobile user equipment. | 10-25-2012 |
20120269290 | SIX TRANSMIT ANTENNA CODEBOOK DESIGN - A method of wireless data transmission includes a base station having six antennas and at least one user equipment. The base station forms at least one layer of data stream including modulated symbols, precodes the at least one layer of data stream via multiplication with consecutive first and second precoding matrices and transmit the precoded data stream to the at least one user equipment via the six antennas. The first precoding matrix W | 10-25-2012 |
20120287799 | CHANNEL FEEDBACK FOR COORDINATED MULTI-POINT TRANSMISSIONS - A method of Coordinated Multipoint (CoMP) communication between a base station has a plurality of points with at least one user equipment (UE). At least one UE receives at least one transmission from the base station having the plurality of points. This UE measures downlink channel state information for each of the plurality of points including a rank indicator (RI), a precoding matrix indicator (PMI) and a channel quality indicator (CQI). This UE transmits the downlink channel station information in an uplink feedback channel to the base station. | 11-15-2012 |
20130258886 | METHOD AND APPARATUS FOR CHANNEL STATE INFORMATION FEEDBACK IN A COORDINATED MULTI-POINT COMMUNICATION SYSTEM - A method of operating a wireless communication system (FIG. | 10-03-2013 |
20140328422 | Codebook Sub-Sampling for CSI Feedback on PUCCH for 4Tx MIMO - Channel state information (CSI) feedback in a wireless communication system is disclosed. User equipment transmits a CSI feedback signal via a Physical Uplink Control CHannel (PUCCH). If the UE is configured in a first feedback mode, the CSI comprises a first report jointly coding a Rank Indicator (RI) and a first precoding matrix indicator (PMI1), and a second report coding Channel Quality Indicator (CQI) and a second precoding matrix indicator (PMI2). If the UE is configured in a second feedback mode, the CSI comprises a first report coding RI, and a second report coding CQI, PMI1 and PMI2. The jointly coded RI and PMI1 employs codebook sub-sampling, and the jointly coding PMI1, PMI2 and CQI employs codebook sub-sampling. | 11-06-2014 |