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:
May. 06, 2014
Filed:
Apr. 30, 2012
Brian Donald Hart, Sunnyvale, CA (US);
Genyuan Wang, Plano, TX (US);
Ahmadreza Hedayat, Allen, TX (US);
Paul J. Stager, Akron, OH (US);
Brian Donald Hart, Sunnyvale, CA (US);
Genyuan Wang, Plano, TX (US);
Ahmadreza Hedayat, Allen, TX (US);
Paul J. Stager, Akron, OH (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
Techniques are provided for generating a precoding matrix for a multi-user multiple-input multiple-output wireless communication system. A first wireless communication device is provided that has a plurality of antennas from which multiple spatial streams are to be simultaneously transmitted to a plurality of second wireless communication devices. A channel matrix is computed between the antennas of the first device and the antennas of each of the second wireless communication devices to produce a plurality of client-specific channel matrices. A singular value decomposition is computed of each client-specific channel matrices. A number of strongest singular values and their corresponding singular vectors are stored from the singular decomposition of each of the client-specific channel matrices. From each client-specific channel matrix, a principal component-like single-client channel matrix is computed. The principal component-like single-client channel matrices are combined to form a principal component-like multi-user channel matrix, from which the precoding matrix is computed.