Joint Filter and Waveform Design for Radar STAP in Signal Dependent Interference (Preprint)
Final rept. 1 Oct 2014-30 Sep 2015
AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH SENSORS DIR/ LAYERED SENSING EXPLOITATION DIV
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Waveform design is a pivotal component of the fully adaptive radar construct. In this paper we consider waveform design for radar space time adaptive processing STAP, accounting for the waveform dependence of the clutter correlation matrix. Due to this dependence, in general, the joint problem of receiver filter optimization and radar waveform design becomes an intractable, non-convex optimization problem. Nevertheless, it is however shown to be individually convex either in the filter or in the waveform variables. We derive constrained versions of a the alternating minimization algorithm, b proximal alternating minimization, and c the constant modulus alternating minimization, which, at each step, iteratively optimizes either the STAP filter or the waveform independently. A fast and slow time model permits waveform design in radar STAP but the primary bottleneck is the computational complexity of the algorithms.
- Operations Research
- Active and Passive Radar Detection and Equipment