Method and system for multiple channel wireless transmitter and receiver phase and amplitude calibration
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United States of America Patent
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Mar 1, 2005
Grant Date -
Dec 4, 2003
app pub date -
May 29, 2002
filing date -
May 29, 2002
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The present invention provides a method and system for estimating common amplitude and phase errors of a multiple channel wireless system. The multiple channel wireless system includes a plurality of transmission channels formed between a plurality of transmission antennas and a plurality of receiver antennas. The method includes estimating transmission channel elements between each transmission antenna and receiver antenna pair of the multiple channel wireless system. Calibration symbols are transmitted from each transmit antenna. Signals are received that correspond to the calibration symbols having traveled through the transmission channels. Received calibration symbols are estimated based upon spatial processing of the received signals and the estimated transmission channel elements. Common amplitude and phase errors are estimated for each transmit and receive antenna pair by comparing the transmitted calibration symbols with the received calibration symbols.
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