An OFDM-MIMO Radar Beamforming Main-Lobe Transmitted Interference Suppression Method Based on Feature Subspace

In view of the complex electromagnetic environment faced by traditional meter-wave radar, especially the transmitted main-lobe jamming which is highly related to the radar transmission waveform, the target, jamming and echo models of meter-wave frequency division multiplexed MIMO radar are established and quantitated. A beamforming main-lobe transmitting interference suppression method for OFDM-MIMO radar based on feature subspace is proposed. In the angle-distance domain, the deceptive target is adaptive suppressed, and the null trap is formed in the position corresponding to the guidance vector of the deceptive target, so the deceptive target is suppressed. Both theory and simulation show that the method can be implemented in the normal direction of the array and has a strong suppression effect on the main-lobe forwarded jamming, and the interference position zero suppression will not be affected even if the deviation of the jamming orientation vector exists.