Inventors:
Don W. Baggett - Orange CA
Luis A. Garcia - San Gabriel CA
Magdalene Ling - Los Angeles CA
Assignee:
Hughes Electronics - Los Angeles CA
International Classification:
G01S 7292
Abstract:
A method and apparatus for detecting the presence of multipath interference within a radar receiver disposed to form sum (. SIGMA. ) and difference (. DELTA. ) signals by time-sampling a target return signal is disclosed herein. In accordance with this method there is formed a sequence of complex conjugates (. SIGMA. *) of the sum signals (. SIGMA. ). Each of the. SIGMA. * signals is multiplied with an associated one of the. DELTA. signals so as to form a time-sampled sequence of. SIGMA. *. DELTA. signals. A power spectrum representation of the time-sampled sequence of signals. SIGMA. *. DELTA. is then generated, wherein the presence of selected spectral components within the. SIGMA. *. DELTA. power spectrum indicate the existence of multipath interference within the radar receiver. In a particular implementation the. SIGMA. *. DELTA.