多载频MIMO-SAR对消处理抗欺骗干扰

 根据多发多收合成孔径雷达(MIMO-SAR)的特点,提出在重叠等效相位中心(EPC)处采用对消处理抑制欺骗干扰的方法.MIMO-SAR采用收发同置天线配置可形成多组位置相同的等效相位中心;发射多载频线性调频(LFM)信号将使每组位置重叠等效相位中心处的回波相位有所差异.利用此特点,可以在子回波相位补偿后采用对消处理对欺骗干扰进行抑制.文中给出了收发同置MIMO-SAR的系统模型,分析了欺骗干扰下的回波特点,指出在位置重叠等效相位中心处的欺骗干扰信号对间仅存在相位差异,给出了对消处理完成欺骗干扰抑制的信号流程,实验结果证明了本文方法的有效性.

Multi-Frequency MIMO-SAR Cancellation for Anti-Deception Jamming

A new cancellation method processed at the superposition of equivalent phase center (EPC) is proposed to suppress deception jamming against multiple-input multiple-output synthetic aperture radar (MIMO-SAR).MIMO-SAR employs co-located antennas in azimuth direction and transmits multiple linear frequency modulation (LFM) signals with step carrier frequency to form crossed EPC,where the echo pairs have the equal delay and different carrier phase.The deception jamming can be eliminated by cancellation processing at each superposition of EPC.Geometry model of MIMO-SAR with co-located antennas is given.The radar echo with deception jamming is analyzed.The difference between deception jamming signal pair at each superposition of EPC and cancellation procedure are discussed.The simulation experiments are performed to validate the proposed method.