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...http://www.google.de/patents/US6924763?utm_source=gb-gplus-sharePatent US6924763 - Clutter rejection in a passive radar receiver of OFDM signals
