间歇采样转发干扰对相位编码雷达的影响分析

Influence of Interrupted-Sampling and Repeater Jamming on Phase-Coded Radar

摘要:

文章分析了间歇采样转发干扰对相位编码脉冲压缩雷达的影响。首先,推导得到了相位编码信号通过匹配滤波器的输出响应。在此基础上,推导了间歇采样转发干扰的匹配输出,研究表明,输出响应为信号编码与间歇采样编码互相关序列的线性插值函数,且只能产生一个假目标。然后,研究了旁瓣抑制网络对间歇采样转发干扰信号的影响,结果表明,旁瓣抑制网络可以有效抑制回波信号的旁瓣,但无法抑制干扰信号的旁瓣。相比输入前数值,干扰旁瓣峰值和位置均发生变化。最后,通过编程计算和仿真实验验证了本文分析的正确性。该研究为雷达 对抗干扰评估试验提供重要的理论支撑。

Abstract:

The influence of interrupted-sampling and repeater jamming on phase-coded pulse compression radar was ana.lyzed in this paper. Firstly, the output response of phase-coded signal through matching filters was obtained. On this basis, the matching output of interrupted-sampling and repeater jamming was derived. The research shows that the output re.sponse was linear interpolation function of signal coding and interrupted-sampling coding cross correlation series, and on.ly a false target can be produced. Secondly, the influence of sidelobe suppression network on interrupted-sampling and re.peater jamming was researched. It was founded that the sidelobe suppression network could effectively suppress the side.lobe of the echo signal, but couldn’t suppress the sidelobe of the interfering signal. Compared with the input data, the peakand position of the interference sidelobe changed. Finally, the correctness of the analysis was verified by programming cal.culation and simulation experiment, which provided important theoretical support for radar jamming evaluation test.