Abstract
Space time adaptive processing (STAP) has the potential to cancel both narrowband interferers and wideband interferers in GPS interference mitigation, for its many freedom degrees. But it dose not have a uniform frequency response across the operating band due to the architecture of STAP. It may introduce a distortion of the desired GPS signal. In this paper, the GPS signal distortion introduced by STAP is investigated in terms of the cross-correlation between the array output and a desired signal. And a compensating approach for the signal distortion is proposed based on the deterministic least square inverse filter. We also derive the solution form of the inverse filter. Simulation result shows that the compensating approach is feasible and efficient.
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