非匀速直线运动SAR导引头目标回波快速模拟

摘要

The traditional 2-D frequency domain echo quick simulation method is adopted for the platforms in the state of uniform linear motion. Because synthetic aperture radar( SAR) seeker unit generally is in the state of nonlinear motion, the above method is not suitable for being used. For SAR seeker unit's nonlinear motion, a new 2-D frequency-domain echo quick simulation method for SAR seeker in the state of nonlinear motion is proposed based on the analysis on the frequency-domain features of the echo signal. Details principle and derivation process of this method is introduced. And finally, the simulation experiment is carried on whose result proves the validity and rationality of the new method.%传统的二维频域快速回波模拟方法是针对平台为匀速直线运动,合成孔径雷达(SAR)导引头一般是非匀速直线运动的,二维频域仿真方法在SAR导引头中并不适用.针对SAR导引头非匀速直线运动情况,在分析回波信号频域特点基础上,提出了非匀速直线运动SAR导引头回波信号快速频域模拟方法,详细介绍了该方法的原理和推导过程.最后,进行了相关仿真实验,实验结果验证了该方法的有效性与合理性.