基于双站定位的SAR场景欺骗干扰技术研究

针对星载SAR系统中虚假场景干扰的信号形式和产生方法这一问题,提出了基于双站定位的欺骗干扰方法,该方法首先对雷达进行无源定位,并对其轨迹进行平滑,然后再产生干扰信号,满足了欺骗干扰对被干扰源准确位置信息的要求,消除了定位时随机误差对成像的影响。研究了雷达定位误差的变化范围及其对欺骗干扰效果的影响,解决了虚假场景干扰技术实施中会遇到的重要问题。仿真结果表明,该方法可以实现实时有效的欺骗干扰。

A Study of SAR Deceptive Scene Jamming Technique Based on Bistatic Location

Aiming at the signal form and the gererating method of the deceptive scene jamming for spaceborne SAR system. This paper proposes the method of jamming based on bistatic location. This method first uses bistatic passive detectors to locate the jammed radar, then smoothes the track and produces jamming signal. It provides accurate position info of the jammed radar, eliminates the effect of random location error on imaging. The bound of location error and its effect on jamming result are studied, so the important problem in implementation of the deceptive scene jamming technique is resolved. The simulation result shows that this method can provide effective jamming.