单脉冲雷达抗同频信号干扰处理方法研究

Research on Processing Method of Monopulse Radar against Co-frequency Signal Interference

针对多台同频单脉冲雷达接力跟踪箭载同一合作目标而产生的异步信号干扰问题,提出了一种移相条件判断与自适应距离移相相结合的综合处理方法。通过对接收通道中所接收到的同频信号运动特性的全程检测,实现了对异步信号的有效识别,结合建立的移相条件和移相准则,实现了对本站信号的自适应距离移相处理,很好地解决了雷达站点间因频繁移相导致的信号偷漏甚至丢失目标等同频干扰问题。设计集成了基于DSP,FPGA的异步信号自适应识别半实物仿真控制系统,进行了同频信号干扰处理方法的验证,结果表明,该系统能够很好地提高同频雷达的移相成功概率,减少异步干扰信号对雷达跟踪信号的影响。

To solve the problem of asynchronous signal interference caused by multiple co-frequency monopulse radar relays tracking the same cooperation target,a comprehensive processing method combining phase-shift condition judgment with adaptive distance phase-shift is proposed.This method achieves the effective recognition of asynchronous signals through the full-range detection of the movement characteristics of the received co-frequency signals in the receiving channel,and realizes the adaptive distance phase-shift processing of the home station signal incorporating the established phase-shift conditions and criterion.The method solves the problems of co-frequency interference such as signal leakage and track loss due to frequent phase-shift between radar stations.Finally,an asynchronous signal adaptive recognition semi-physical simulation control system based on DSP and FPGA is designed to validate the co-frequency signal interference processing method.The validation results show that this method can greatly improve the phase-shift success probability of the co-frequency radar and reduce the influence of the asynchronous interference signal on the radar tracking signal.