Method for improving the performance of a wireless network utilizing beamforming weighting vectors
US7551682B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2007 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Nov 2, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B7/0634
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Techniques are provided for selecting one or more downlink beamforming vectors for a wireless channel to create beamformed signals between a first wireless communication device, e.g., a base transceiver station (BTS) and a second wireless communication device, e.g., a mobile station (MS). The method comprises estimating a downlink channel covariance matrix from an uplink covariance matrix of the wireless channel, wherein the uplink covariance matrix is computed based on uplink signals received at the first wireless communication device from the second wireless communication device. A plurality of candidate downlink beamforming weighting vectors are generated from the uplink covariance matrix. Each of the candidate downlink beamforming weighting vectors are applied to a corresponding downlink signal for transmission via the plurality of antennas of the first wireless communication device to the second wireless communication device such that multiple downlink signals are transmitted from the first wireless communication device to the second wireless communication device, each downlink signal with a different one of the plurality of candidate downlink beamforming weighting vectors. Fe…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.