Unimodular MIMO Waveform Design for Saturated Forwarded Jammer Suppression

In this paper, we address the unimodular MIMO waveform design for anti-jamming purpose. To maximize the jamming efficiency, modern jammers normally forward radar signals in saturated manner. That is to say, the amplitude modulation featured by the spatial synthesized waveform of MIMO will be abandoned. Under this assumption and to reduce the jamming affection, we optimize the MIMO waveform set to minimize the correlation and sidelobe energy between the spatial synthesized signals and the saturated forwarded jamming. Metrics assessing both anti-jamming effect and correlation performance are proposed. And particularly, we build a way to calculate both the objective function and its gradient via FFT, such that the considered waveform design problem can be efficiently to ensure a real-time response.