一种针对LFM-MIMO雷达的新型间歇采样转发干扰方法
吕品品 , 郑娜娥 , 岳嘉颖 , 王盛
信息工程大学学报 ›› 2025, Vol. 26 ›› Issue (05) : 505 -511.
一种针对LFM-MIMO雷达的新型间歇采样转发干扰方法
A Novel Intermittent Sampling Repeater Jamming Method for LFM-MIMO Radar
针对线性调频多输入多输出(LFM-MIMO)雷达的干扰问题,提出一种周期交替式非均匀间歇采样转发干扰(ISRJ)方法。该方法通过周期式地改变采样时长,在对LFM-MIMO雷达的脉冲信号进行短时采样后多次转发,并重复该过程至脉冲结束。首先,阐述均匀、非均匀两种模式下ISRJ干扰的基本原理;然后,推导面向LFM-MIMO雷达信号的非均匀ISRJ干扰信号模型,并分析该模型产生假目标的成因。通过仿真实验分析采样脉宽、采样方式与转发次数等参数对干扰效果的影响,结果表明该方法可生成非规律性分布的假目标群,且采用较高转发次数时可在欺骗干扰的基础上实现一定的压制干扰效果。
In response to the jamming issue of linear frequency modulation-multiple input multiple output (LFM-MIMO) radar, a periodic alternating non-uniform intermittent sampling repeater jamming (ISRJ) method is proposed. In this method, the sampling duration is periodically changed. The pulse signal of the LFM-MIMO radar is subjected to short-time sampling, followed by multiple forwarding, and this process is repeated until the end of the pulse. First, the basic principles of ISRJ in uniform and non-uniform modes are elaborated. Then, the non-uniform ISRJ signal model for the LFM-MIMO radar signals is derived, and the causes of false targets generated by this model are analyzed. Through simulation experiments, the impacts of parameters such as sampling pulse width, sampling method, and forwarding times on the jamming effect are analyzed. The results indicate that a group of false targets with non-regular distribution can be generated by using the proposed method, and a certain degree of suppression jamming effect can be achieved on the basis of deception jamming when a higher number of forwarding times is adopted.
LFM-MIMO雷达 / 欺骗干扰 / 间歇采样转发干扰 / 周期交替采样 / 非均匀采样转发
LFM-MIMO radar / deception jamming / intermittent sampling repeater jamming / periodic alternating sampling / non-uniform sampling forwarding
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