The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 24, 2014
Filed:
Jun. 24, 2011
Hang Jin, Plano, TX (US);
LI Guo, Irving, TX (US);
Paul J. Stager, Akron, OH (US);
Matthew A. Silverman, Shaker Heights, OH (US);
Bror Peterson, Murphy, TX (US);
Hang Jin, Plano, TX (US);
Li Guo, Irving, TX (US);
Paul J. Stager, Akron, OH (US);
Matthew A. Silverman, Shaker Heights, OH (US);
Bror Peterson, Murphy, TX (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Techniques are provided to allow for implicit determination of the full spatial signature of a wireless channel between first and second wireless devices for multiple-input multiple-output (MIMO) wireless communication between the first and second wireless devices. The first wireless device receives uplink signals at a plurality of antennas of the first wireless device that are transmitted via a plurality of antennas of a second wireless device. Values at a plurality of subcarriers of the received signals across the plurality of antennas of the first wireless device are derived. Using a sliding window for groups of adjacent subcarriers, downlink beamforming weights are computed for each group of subcarriers using channel information of one or more proximate groups of subcarriers. The downlink beamforming weights for the respective groups of subcarriers are applied to a number of spatial streams in a downlink transmission to be transmitted to the second wireless device.