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:
Apr. 03, 2012
Filed:
Feb. 06, 2008
Genyuan Wang, Plano, TX (US);
Ahmadreza Hedayat, Allen, TX (US);
Hanqing Lou, Garland, TX (US);
Hang Jin, Plano, TX (US);
Genyuan Wang, Plano, TX (US);
Ahmadreza Hedayat, Allen, TX (US);
Hanqing Lou, Garland, TX (US);
Hang Jin, Plano, TX (US);
Cisco Technology, Inc., San Jose, CA (US);
Abstract
The present invention discloses a method for selecting a transmission scheme in a multiple-input-multiple-output (MIMO) wireless communications system. The method comprises receiving a downlink request to transmit a data stream to a wireless station, checking the availability of channel state information (CSI) associated with the wireless station, determining the validity characteristic of beamforming weighting vectors associated with the wireless station, selecting a transmission scheme from a plurality of predetermined transmission schemes based on the availability of the CSI and the validity characteristic of the beamforming weighting vectors.