Cosite interference rejection system using an optical approach
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United States of America Patent
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Jun 12, 2007
Grant Date -
Sep 21, 2006
app pub date -
Aug 22, 2005
filing date -
Aug 31, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A cosite interference rejection system allows cancellation of large interfering signals with an optical cancellation subsystem. The rejection system includes an interference subsystem coupled to a transmit system, where the interference subsystem weights a sampled transmit signal based on a feedback signal such that the weighted signal is out of phase with the sampled transmit signal. The optical cancellation subsystem is coupled to the interference subsystem and a receive antenna. The optical cancellation subsystem converts an optical signal into a desired receive signal based on an interfering coupled signal and the weighted signal. The weighted signal is therefore used to drive the optical cancellation subsystem. The rejection system further includes a feedback loop for providing the feedback signal to the interference subsystem based on the desired receive signal.
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