摘要
针对合成孔径雷达欺骗干扰过程中雷达参数侦测困难以及传统间歇采样导致假目标滞后的问题,提出一种改进的间歇采样转发方式,通过对采样存储的信号进行处理,根据线性调频信号延迟与频率偏移耦合的特征达到假目标串前移的效果,从而有效保护干扰机附近区域的场景目标.定量分析了假目标位置与信号处理阶数和延迟量的关系,仿真给出了不同参数情况下假目标串的干扰效果.改进方法在保留了间歇采样所有优势的情况下,解决了假目标滞后的问题,同时也隐藏了传统移频干扰会导致中心频率偏移的特征,并且所形成假目标的位置与雷达信号调频斜率无关,适用于雷达脉间调频斜率捷变的情况.
In order to avoid detecting the parameters of synthetic aperture radar and the delay because of the traditional interrupted sampling repeater jamming method, an novel jamming technique based on interrupted sampling repeater jamming has been presented in this paper. The processing of the sampled radar signal makes its frequency shifting because of the delay and the position of false targets moving forward which can protect targets in the area around the jammer effectively. The quantitative relation between the false targets and the order of signal processing or the delay of signal is deduced and ana- lyzed. Simulation show the jamming effects with different order and delay and it can be adjusted conveniently to generate the decoy targets ahead of the real target. The impro-ved method retains advantages of interrupted sampling repeater jamming and solves the lag caused by retransmitting. In particular, it suits the situation that the frequency rate changes every different pulse.
出处
《电波科学学报》
EI
CSCD
北大核心
2014年第6期1045-1050,1069,共7页
Chinese Journal of Radio Science
基金
部预研基金(9140A07010713BQ02025
CASC04-02)
教育部博士点基金(20113219110018)
国家自然科学基金(批准号:61302188)
江苏省自然科学基金(批准号:BK20131005)
