线性调频脉冲压缩雷达假目标干扰数学分析

Mathematical Analysis of False Target Jamming of LFM Pulse-compression Radar

线性调频脉冲压缩雷达由于具有较好的作用距离、距离分辨率及高增益,使得传统干扰方式对其很难实施有效干扰。为此,多假目标干扰技术便应运而生,从时域、频域上将截获的线性调频信号进行延时、移频及压缩处理,形成多个逼真的假目标以达到欺骗目的。从数学推导角度阐述了多假目标干扰技术的原理,得出了雷达信号经锯齿调相或正弦调相后,再经压缩网络产生多个假目标的理论形成过程。

Linear frequency modulation（LFM）pulse-compression radar has good operating distance,good range resolution and high gain,so they are difficult to be jammed through traditional jamming modes,thereby multiple false targets jamming technology emerges,which performs timedelay,frequency shift and compression to the intercepted LFM signals in the time-domain and frequency-domain,multiple realistic false targets for deception jamming are formed.This paper mainly expatiates multiple false targets jamming principle by employing mathematical derivation,fetches the theoretical process that false targets are generated after radar signals is modulated with sawtooth-phase or sinusoid-phase and via compressed network.