07778211 is referenced by 9 patents and cites 16 patents.

Described herein is a method for obtaining a downlink beamforming weighting vector in a wireless communications system based on channel information about an uplink channel. The method comprises obtaining the channel information about the uplink channel by a means selected from the group comprising of training signals, pilot signals, and data signals, wherein the uplink channel comprises a set of uplink sub-channels, calculating a spatial signature of the uplink channel with the channel information, and computing a downlink beamforming weighting vector of a downlink channel with the spatial signature of the uplink channel, wherein the downlink channel comprises a set of downlink sub-channels that share few or no sub-carriers with the set of uplink sub-channels.

Title
Method for computing a downlink beamforming weighting vector based on up link channel information
Application Number
11/711443
Publication Number
7778211 (B2)
Application Date
February 26, 2007
Publication Date
August 17, 2010
Inventor
Hang Jin
Plano
TX, US
Ahmadreza Hedayat
Allen
TX, US
Assignee
Cisco Technology
CA, US
IPC
H04B 7/00
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