06615024 is referenced by 127 patents and cites 16 patents.

A method and apparatus for estimating the downlink signature for a remote transceiver which is part of a wireless communication system that includes a main transceiver for communicating with the remote transceiver. The main transceiver includes an array of transmit antenna elements. The method uses the remote transceiver for receiving signals when the main transceiver transmits downlink calibration signals. When the main transceiver also has a receive antenna array, the remote transceiver can transmit uplink calibration signals to the main transceiver for determining an uplink signature. The downlink and uplink signatures are used to determine a calibration function to account for differences in the apparatus chains that include the antenna elements of the arrays, and that enable downlink smart antenna processing weights to be determined from uplink smart antenna processing weights when the main transceiver includes means for smart antenna processing according to weights.

Title
Method and apparatus for determining signatures for calibrating a communication station having an antenna array
Application Number
9/295434
Publication Number
6615024 (B1)
Application Date
April 20, 1999
Publication Date
September 2, 2003
Inventor
Mitchell D Trott
Mountain View
CA, US
Christopher R Uhlik
Danville
CA, US
Craig H Barratt
Redwood City
CA, US
Tibor Boros
Sunnyvale
CA, US
Agent
Inventek
US
Agent
Dov Rosenfeld
US
Assignee
ArrayComm
CA, US
IPC
H04B 17/00
View Original Source