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

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

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

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