摘要
针对低重频动目标检测雷达,提出了一种基于脉间码型捷变的相位编码旁瓣抑制方法.该方法将信号设计与信号处理相结合,在相参积累帧内的各个脉冲重复周期发射捷变的编码序列,利用不同编码序列脉压后主瓣位置相同而旁瓣位置不同的性质,经过相参积累达到抑制旁瓣的目的.计算机仿真与测试结果表明,该方法可以有效地抑制相位编码的距离旁瓣,而且在存在回波遮挡的情况下仍然具有较好的旁瓣抑制性能.
Shortcomings of traditional sidelobe suppression technique are analysed, and a novel sidelobe suppression method of phase-coded signal based on interpulse code agility is proposed for low pulse repetition frequency moving target detection radar. In this method, agile code sequences are transmitted in different pulse repetition time of a coherent integration frame. Sidelobe is suppressed after integration because the main lobes of autocorrelation function among different codes are relevant while the sidelobes are random. Computer simulation and experimental results showed that the code agility method has excellent performance to reduce the range sidelobe, and that it can work well when the target echo is eclipsed.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2009年第5期441-445,共5页
Transactions of Beijing Institute of Technology
基金
国家部委预研项目(51483010205BQ0105)
关键词
相位编码信号
旁瓣抑制
码型捷变
相参积累
回波遮挡
phase-coded signal
sidelobe suppression
code agility
coherent integration
target echo eclipse
