Mitigating Range-Ambiguous Clutter Impact in Pseudo-Aperiodic Waveforms Using Adaptive Processing

Phase diverse and waveform repetition interval (WRI)/pulse repetition interval (PRI) diverse radar waveforms provide a number of advantages including being robust to intentional interference sources. Techniques for processing such waveforms have been proposed previously but with some drawbacks. Some of these techniques require joint range-Doppler adaptive filters for the full waveform which is computationally complex for typical over-the-horizon-radar waveforms. Other proposed techniques degrade in the presence of range-ambiguous clutter. In this paper, we introduce an adaptive processing technique for mitigating the impact of range-ambiguous clutter in phase diverse and WRI/PRI diverse waveforms. The processing is separable in range and Doppler, thus computationally quite efficient. The technique is capable of suppressing strong ambiguous clutter returns.