Method and apparatus for receiving a radio frequency signal using a plurality of antennas
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United States of America Patent
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Mar 13, 2001
Grant Date -
N/A
app pub date -
May 29, 1998
filing date -
May 29, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
An antenna array portion of a communication device receives a desired signal and an interfering signal. The unweighted desired and interfering signals from a first antenna (302) are then combined in a summer (308) with weighted versions of the signals from a second antenna (304) to produce a received RF signal (312). The signal-to-noise ratio (SNR) of the received RF signal (312) is then estimated using a spectral analysis technique. This estimate, along with the complex weights applied to the signal from the second antenna, is then stored. Utilizing feedback and a methodology for searching through a range of sets of complex weights, the weights optimizing the SNR are determined and used to weight subsequent signals from the second antenna. In this way the antenna array's gain pattern is adjusted to maximize the SNR of the desired signal
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