LFM-频率编码复合低截获波形信号处理方法

LFM-频率编码复合低截获波形把LFM技术和FSK技术组合在一起，获得大的时带积，从而增强了雷达的低截获性能，但LFM-频率编码复合低截获波形的相关距离旁瓣较高，影响雷达检测性能。针对这一问题，该文对旁瓣抑制方法展开了算法研究和工程应用设计，通过离线设计旁瓣抑制滤波器，代替传统匹配滤波或相关处理，从旁瓣抑制滤波器库中选取相应的旁瓣抑制滤波器应用于回波信号采样数据，完成脉压的同时抑制距离旁瓣，实现较为简单，适合工程化应用。仿真结果表明了该设计的有效性，旁瓣性能得到改善。

Signal Processing Technique for LFM/FSK Hybrid LPI Waveform

Hybrid LFM-frequency encoding low probability of interception (LPI) waveform combines the techniques of LFM and FSK, which can obtain a large time-bandwith product, thus enhancing the capability of LPI. However, hybrid LFM/FSK LPI signal suffers from high range sidelobes, resulting in the decrease of radar detectability. To this end, this paper deals with the problem of sidelobe suppression. Specifically, the specific sidelobe suppression filter selected from its library which is designed off-line, instead of matched filter or correlation, is exploited on the echo signal. This operation can accomplish the compression pulse while achieving low sidelobes, and its engineering implementation is simple. Simulation results illustrate the effectiveness of the devised filter, showing its ability to obtain lower sidelobes in comparison with the traditional process.