Ambiguity Function Analysis of Adaptive Colored-Noise Radar Waveforms

Ambiguity Function Analysis of Adaptive Colored-Noise Radar Waveforms

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Adaptive radar waveforms were designed to be spectrally orthogonal to the received time-varying interference environment. This provides a natural defense against hostile or benign radio frequency interference. An ambiguity function analysis was presented for colored waveforms that graphically illustrates ambiguities, resolution/accuracy of range (time) and Doppler (frequency) estimates, and inherent interference rejection capabilities. Both eigenvector and multistage Wiener filter methods were used to construct such waveforms. The techniques presented illustrate a general methodology for designing adaptive waveforms trading off interference rejection performance, algorithm complexity, sidelobe levels, Doppler tolerance, and ambiguities.

Inspec keywords: Doppler shift; Wiener filters; radar interference; eigenvalues and eigenfunctions; interference suppression; adaptive radar

Other keywords: interference rejection capability; received time-varying interference environment; Doppler estimation; ambiguity function analysis; colored waveforms; eigenvector; multistage Wiener filter methods; adaptive colored-noise radar waveform design; Doppler tolerance; sidelobe levels; radiofrequency interference

Subjects: Algebra; Filtering methods in signal processing; Radar equipment, systems and applications; Electromagnetic compatibility and interference

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