| Patent application number | Description | Published |
|---|
| 20100210235 | METHOD AND APPARATUS FOR RECEIVER DIVERSITY CONTROL IN WIRELESS COMMUNICATIONS - Receiver diversity in a wireless device is controlled in response to operating conditions, transmission requirements, and control settings. The control of diversity reduces power consumption by enabling receive diversity on given conditions. Operating conditions, transmission requirements, and control settings are used separately or used in conjunction to determine whether benefits of multi-antenna receive diversity, such as higher link capacity, higher data throughput, lower transmit power, and lower error rate, warrant the higher power cost of the diversity. | 08-19-2010 |
| 20110018780 | Antenna Array For Multiple In Multiple Out (MIMO) Communication Systems - The present disclosure provides techniques for configuring multiple element antenna arrays for use in multiple input multiple output (MIMO) communications. The antenna arrays include a ground plane and antenna elements. The ground plane forms an electrically conductive surface having a ground potential. The antenna elements, located near the ground plane, transmit and receive a wireless communication signals over a predetermined wireless channel. | 01-27-2011 |
| 20110081869 | APPARATUS AND METHOD FOR DETERMINING MULTI-ANTENNA RADIATED PERFORMANCE OF WIRELESS DEVICES - An apparatus and method for determining radiated performance of multiple antennas in a wireless system on the basis of capacity degradation comprising calculating a plurality of normalized IID channel matrices based on a plurality of complex gain patterns; calculating a plurality of colored channel matrices based on the plurality of normalized IID channel matrices; calculating a first channel capacity corresponding to the plurality of normalized IID channel matrices; calculating a second channel capacity corresponding to the plurality of colored channel matrices; and calculating a capacity degradation based on the first channel capacity and the second channel capacity. | 04-07-2011 |
| 20110199946 | METHOD AND APPARATUS FOR SUPPORTING ADAPTIVE CHANNEL STATE INFORMATION FEEDBACK RATE IN MULTI-USER COMMUNICATION SYSTEMS - Certain aspects of the present disclosure relate to techniques for achieving adaptive channel state information (CSI) feedback rate in multi-user communication systems. A rate by which CSI feedback can be transmitted from each user station of a wireless system to a serving access point may be adjusted based on evolution of a channel between that user station and the access point. | 08-18-2011 |
| 20110222472 | PROTOCOL TO SUPPORT ADAPTIVE STATION-DEPENDENT CHANNEL STATE INFORMATION FEEDBACK RATE IN MULTI-USER COMMUNICATION SYSTEMS - Methods and apparatuses are proposed for supporting one or more user-dependent channel state information (CSI) feedback rates in a downlink spatial division multiple access (SDMA) system. For certain aspects, an access point (AP) may receive a channel evolution feedback from one or more stations and send a request for CSI to the stations whose CSI values need to be updated. For certain aspects, the AP may poll the stations for updated CSI values. For certain aspects, deterministic back-off timers may be assigned to the stations indicating when to send their CSI feedback. The proposed methods may improve system performance. | 09-15-2011 |
| 20110222473 | PROTOCOL TO SUPPORT ADAPTIVE STATION-DEPENDENT CHANNEL STATE INFORMATION FEEDBACK RATE IN MULTI-USER COMMUNICATION SYSTEMS - Methods and apparatuses are proposed for supporting one or more user-dependent channel state information (CSI) feedback rates in a downlink spatial division multiple access (SDMA) system. For certain aspects, an access point (AP) may receive a channel evolution feedback from one or more stations and send a request for CSI to the stations whose CSI values need to be updated. For certain aspects, the AP may poll the stations for updated CSI values. For certain aspects, deterministic back-off timers may be assigned to the stations indicating when to send their CSI feedback. The proposed methods may improve system performance. | 09-15-2011 |
| 20110235533 | PROTOCOL TO SUPPORT ADAPTIVE STATION-DEPENDENT CHANNEL STATE INFORMATION FEEDBACK RATE IN MULTI-USER COMMUNICATION SYSTEMS - Methods and apparatuses are proposed for supporting one or more user-dependent channel state information (CSI) feedback rates in a downlink spatial division multiple access (SDMA) system. For certain aspects, an access point (AP) may receive a channel evolution feedback from one or more stations and send a request for CSI to the stations whose CSI values need to be updated. For certain aspects, the AP may poll the stations for updated CSI values. For certain aspects, deterministic back-off timers may be assigned to the stations indicating when to send their CSI feedback. The proposed methods may improve system performance. | 09-29-2011 |
| 20110299480 | METHOD AND APPARATUS FOR SUPPORTING ADAPTIVE CHANNEL STATE INFORMATION FEEDBACK RATE IN MULTI-USER COMMUNICATION SYSTEMS - Certain aspects of the present disclosure relate to techniques for achieving adaptive channel state information (CSI) feedback rate in multi-user communication systems. A rate by which CSI feedback can be transmitted from each user station of a wireless system to a serving access point may be adjusted based on evolution of a channel between that user station and the access point. | 12-08-2011 |
