摘要
针对间歇采样转发干扰空间分布特性较差,而传统移频处理暴露干扰特征及无法应对调频斜率捷变的弱点,提出应用SSC移频算法改进的间歇采样转发干扰。首先从雷达模糊函数出发推导假目标表达式,分析该干扰方法存在假目标的空间分布缺陷,然后利用N阶频谱扩展-压缩盲移频算法,通过对信号及其延迟进行N倍和N-1倍频谱扩展,利用后者对前者频谱压缩从而得到前移假目标。经理论分析与仿真验证,这种改进方法能有效优化间歇采样转发干扰的欺骗干扰假目标空间分布,且相比直接移频处理,不需要雷达信号先验知识、不会暴露移频特征,可以有效对抗调频斜率捷变雷达。
Aimed at the problems that the spatial distribution of interrupted-sampling and repeater jamming is not ideal, and the traditional frequency shift methods are hardly utilized for dealing with characteristics of interference, a spectrum spread and compression （SSC） algorithm is used to change this situation. This paper analyzes the expression of fake target based on ambiguity function. Then a SSC algorithm is used to produce advance interferences. The theory and simulation results show that this proposed method is able to improve the spatial distribution of this kind of interference. What＇s more, compared with the di rect frequency shift, this method can be effectively confronted by the frequency modulation slope agility radar without prior knowledge.
出处
《空军工程大学学报（自然科学版）》
CSCD
北大核心
2018年第1期60-64,共5页
Journal of Air Force Engineering University(Natural Science Edition)
基金
国家自然科学基金(61601503)
关键词
线性调频
间歇采样转发干扰
移频干扰
SSC算法
liner frequency modulated
interrupted-sampling and repeater jamming
frequency shift jamming
spectrum spread and compression algorithm
