Steering matrix feedback for beamforming

Details Steering matrix feedback for beamforming Steering matrix feedback for beamforming

2006-07-05

2009-08-04

Tarcza, Thomas H (Department: 3662)

Communications: directive radio wave systems and devices (e.g.,

Directive

Including a steerable array

Reexamination Certificate

active

07570210

ABSTRACT:
A network device includes a calibration module that receives a first channel state information (CSI) matrix from a link partner, that determines CSI based on radio frequency (RF) signals transmitted from the link partner, and that generates a second CSI matrix that includes the CSI for the RF signals. The network device includes a first steering module that determines a first steering matrix based on the first CSI matrix, a control module that adjusts beamforming weights based on the first steering matrix, and a second steering module that determines a second steering matrix based on the second CSI matrix and that transmits the second steering matrix to the link partner.

REFERENCES:
patent: 6061023 (2000-05-01), Daniel et al.
patent: 2004/0087324 (2004-05-01), Ketchum et al.
patent: 2007/0129018 (2007-06-01), Trainin et al.
Haynes, Toby; “A Primer on Digital Beamforming”; http://www.spectrumsignal.com/ Mar. 28, 1998; 15 pages.
HT PHY Specification; Enhanced Wireless Consortium publication; V1.27; Dec. 23, 2005; 67 pages.
HT MAC Specification; Enhanced Wireless Consortium publication; V1.24; 2005; 100 pages.

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