Clutter rejection in a passive radar receiver of OFDM signals
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United States of America Patent
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Aug 2, 2005
Grant Date -
Apr 8, 2004
app pub date -
Jan 18, 2002
filing date -
Feb 7, 2001
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Abstract
The invention concerns a passive radar receiver for a received orthogonal frequency division multiplex-type signal consisting of symbol frames each emitted on coded orthogonal carriers. After formatting the received signals into digital symbols (S1 S1), a filtering circuit (2) eliminates by subtraction or using a covariance matrix, in the symbol signal at least unwanted signals with null Doppler effect so as to apply a filtered signal (X′) including essentially signals backscattered by mobile targets to a Doppler-distance correlator (4).
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