基于旁瓣匿影的抗密集假目标干扰研究

针对脉冲压缩雷达中旁瓣匿影技术门限判决规则简单、抗干扰能力差的问题，首先基于脉冲压缩雷达旁瓣匿影的一般结构，对旁瓣匿影门限选择进行了理论分析，推导了匿影门限、检测门限与雷达探测性能的关系；然后，着重针对密集假目标干扰覆盖目标回波后错误匿影的问题，提出了一种“二次判决”方法，该方法对超过匿影门限的距离单元进行再次判决。仿真结果表明，该方法能够在正常抑制干扰的同时，解决目标信号被匿影而丢失的问题。

A Novel Method for Countering Concentrated False Targets Jamming Based on Sidelobe Blanking

The common threshold setting of sidelobe blanking in pulse-compression radar is very simple and has poor anti-jamming performance. Based on the general form of the sidelobe blanking in pulse compres- sion radar, the comprison expression between threshold and radar detection is derived to optimize the selec- tion of blanking threshold and detection threshold. In order to solve the problem when concentrated false tar gets jamming covers target signal and leads to wrong blanking, put forward a method of ＂second judgement＂ which checks the jamming distance cell to estimate whether it＇s mixed with target signal. The analysis results show that the optimized threshold performs better than regular one and ＂second judgement＂ can solve the wrong blanking resulted from the concentrated false target jamming.