Communications: directive radio wave systems and devices (e.g. – Return signal controls radar system – Receiver
Patent
1988-11-17
1990-02-13
Moskowitz, Nelson
Communications: directive radio wave systems and devices (e.g.,
Return signal controls radar system
Receiver
342162, 342196, 342192, G01S 734
Patent
active
049010824
ABSTRACT:
Prior art radar systems do not adapt the transmitted signal to avoid the interference bands but only filter the unadaptive receiver signal to eliminate the interference with resulting loss in detectability and distortion that in turn causes loss in resolution and increased ambiguity. The present invention allows a radar system to operate in an electromagnetic environment where co-channel narrow band interference is present, without loss of detectability, resolution and ambiguity. The present invention system adapts the radar transmitted signal so that its spectral energy is significant only in the interference free portions of the radar channel. It next adapts the receiver to detect this transmitted spectrum and then equalizes the signal by means of transversal equalizer coefficients to reduce distortions to the signal sidelobes.
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O'Connor Martin G.
Schreiber Heinz H.
Grumman Aerospace Corporation
Moskowitz Nelson
Sotomayor John B.
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