逆合成孔径雷达目标回波仿真方法研究

Method for ISAR Echo Simulation

通过对逆合成孔径雷达成像过程的分析,提出一种采用宽带幅相量化数字射频存储技术和数字图像合成技术的逆合成孔径雷达目标回波仿真方法。该方法利用数字射频存储器对截获的雷达信号进行采样和存储,并将采集的幅度样本变换为相位样本,然后由数字图像合成器对相位样本进行相应的调制来合成逆合成孔径雷达目标回波。推导并分析了数字图像合成器的工作过程。仿真结果表明该方法可以逼真的仿真逆合成孔径雷达的目标回波。

A method based on wideband amplitude-phase quantiziton digital RF memory （DRFM） and digital image synthesizer （DIS） to simulate the inverse synthetic aperture radar（ISAR） echo signal was brought forward by analyzing the processes of ISAR imaging. This method used the DRFM to sample and storage the intercepted ISAR signal, and translate the amplitude samples to phase samples. The DIS was used to modulate the phase samples to synthesize ISAR echo signals. The simulated results show that this method can simulate complex targets＇ ISAR ehco realistically.