基于延迟不变的LFM雷达移频干扰方法

Journal of Systems Engineering and Electronics ›› 2009, Vol. 31 ›› Issue (8): 1861-1863.

基于延迟不变的LFM雷达移频干扰方法

王玉军^1,2, 赵国庆¹, 胡曦明²

1. 西安电子科技大学电子对抗研究所, 陕西, 西安, 710071;
2. 空军工程大学电讯工程学院, 陕西, 西安, 710077

收稿日期:2008-04-15 修回日期:2008-08-23 出版日期:2009-08-20 发布日期:2010-01-03
作者简介:王玉军(1976- ),男,博士研究生,主要研究方向为电子战信号处理、自适应干扰信号合成、雷达对抗、通信对抗等.E-mail:xidianlunwen@126.com

Method of shift-frequency jamming to LFM radar based on delay invariance

WANG Yu-jun^1,2, ZHAO Guo-qing¹, HU Xi-ming²

1. Inst. of Electronic Countermeasures, Xidian Univ., Xi'an 710071, China;
2. Telecommunication Engineering Inst., Air Force Engineering Univ., Xi'an 710077, China

Received:2008-04-15 Revised:2008-08-23 Online:2009-08-20 Published:2010-01-03

摘要/Abstract

摘要： 提出了一种新的移频干扰方法,利用线性调频(linear frequency modulated,LFM)信号频率差与时间无关的特性,将LFM信号与其自身延迟信号相乘,获得当前脉冲线性时频关系与频率差,并用此频率差对LFM信号进行移频,所得到的干扰信号对频率捷变和频率分集具有自适应性.给出了一种实现此算法的干扰机结构,并推导了干扰信号经匹配滤波后增益损失计算方法.最后进行了仿真验证,仿真结果与理论分析一致.

Abstract: A new method is proposed according to the features that the frequency difference of linear frequency modulated(LFM) signal is independent to time.The LFM signal is multiplied by its self-delayed one to get the linear relationship between them and then the LFM signal frequency is shifted.This method is adaptive to chirp-rate-agility or frequency-diversity.One of the jammer structures which can realize the method is given and the calculation formulas describing the gain of the jamming signal after match filter is deduced.The simulation result is consistent with the one obtained by theoretical analysis.

中图分类号:

TN972.31

王玉军, 赵国庆, 胡曦明. 基于延迟不变的LFM雷达移频干扰方法[J]. Journal of Systems Engineering and Electronics, 2009, 31(8): 1861-1863.

WANG Yu-jun, ZHAO Guo-qing, HU Xi-ming. Method of shift-frequency jamming to LFM radar based on delay invariance[J]. Journal of Systems Engineering and Electronics, 2009, 31(8): 1861-1863.