1972•IEEE Transactions on Electromagnetic CompatibilityRequires access

Cross-Ambiguity Function for a Linear FM Pulse Compression Radar

Stanley A. Cohen

Abstract

Three-dimensional computer plots of the cross-ambiguity function are developed in order to illustrate the discrimination against improperly coded signals in a pulse compression matched filter. The filter response envelope amplitude is plotted as a function of time and frequency offset for input signals mismatched in FM rate, pulsewidth, and timedomain amplitude weighting. Illustrative examples of the unnormalized cross-ambiguity diagram reveal the signal-to-interference ratio improvement of this filter in the presence of signals with no FM or reverse slope FM. The effect of Hamming weighting on the waveform response is also shown.

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Key concepts: Ambiguity function, Pulse compression, Amplitude, Waveform, Weighting, Matched filter, Pulse repetition frequency, Filter (signal processing)