电子科技大学学报2017，Vol.46Issue(2)：335-339,5.DOI:10.3969/j.issn.1001-0548.2017.02.003
LFM-频率编码复合低截获波形信号处理方法
Signal Processing Technique for LFM/FSK Hybrid LPI Waveform
摘要
Abstract
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.关键词
LFM-Costas编码复合波形/LFM-频率步进编码复合波形/离线失配滤波/旁瓣抑制Key words
hybrid LFM/Costas waveform/hybrid LFM/SF (stepped frequency) waveform/pre-stored mismatched filter/sidelobe suppression分类
信息技术与安全科学引用本文复制引用
罗美方,郝志梅,王强..LFM-频率编码复合低截获波形信号处理方法[J].电子科技大学学报,2017,46(2):335-339,5.基金项目
航空科学基金(2014ZC07002) （2014ZC07002）
