对V-调频信号的间歇采样转发干扰研究

Jamming V-FM Signal Using Interrupted-Sampling Repeater

间歇采样转发是一种新型的干扰式样,可以产生相干假目标串的干扰效果。研究了对V-调频信号的间歇采样干扰方法。在阐述了间歇采样转发干扰的基本原理后,分析了间歇采样转发信号的时频和频域特性,在理论上推导了干扰信号经匹配滤波后输出的信号模型;在此基础上,根据低阶假目标的幅相特性,提出了一种使假目标回波和真实目标回波的反相对消方法,并进一步推导了为实现反相对消对转发时延、转发频率、转发功率的要求。仿真结果表明这种方法能实现目标回波的有效对消。该文研究成果对于间歇采样转发干扰机的原理设计及使用具有指导意义。

Interrupted-sampling repeater jamming（ISRJ） is a novel jamming mode that can produce a train of coherent false targets. In this paper, a jamming approach of applying ISRJ to V-FM signal is presen- ted. After the principles of ISRJ are expounded, the characteristics of jamming signal and false target, inclu- ding time-domain characteristics, frequency-domain characteristics, are described. On this basis, a method that cancels target echo using false target signal is put forward. Then, the key parameters which determine the cancelling effect, including the repeater power, the delay time and frequency of repeater are discussed in detail. At last, simulation results are presented and addressed. This work is beneficial to the jamming design and use of ISRJ.