Patent ID: 6999025
Filing Date: 2006-02-14
Classification: G01S

Abstract:
1. A radar receiver adapted to process a radio signal received via a propagation channel and including frames of symbols each emitted on coded orthogonal carriers, said radar receiver comprising: N receiver means, N being an integer more than 1, shaping means for converting N signals received by said receiver means into N digital symbol signals, means for creating N−1 dummy signals that are analogous to a reference signal representative of unwanted zero Doppler effect signals in said N received symbol signals, said dummy signals being arranged to be emitted virtually along directional vectors orthogonal to each other and to a directional vector of a real direct path between a real emitter of said emitted symbols and said radar receiver in an N-dimensional frame of reference, and said dummy signals being arranged to be time-delayed relative to each other and relative to said real direct path by different integer multiples of the reciprocal of said bandwidth of said carriers, means for adding each received symbol signal to said N−1 dummy signals to produce modified received signals, filtering means for eliminating said unwanted zero Doppler effect signals in said modified received signals to provide filtered symbol signals including essentially signals backscattered by targets, and Doppler-distance correlation means for discriminating mobile targets in said filtered symbol signals.