LFM-DPC抗间歇采样转发干扰波形集设计算法

打开文本图片集

关键词：间歇采样转发干扰；线性调频-离散相位编码波形集；多普勒容限；KKT条件；模糊函数 中图分类号：TN95 文献标志码：A DOI：10.12305/j. issn.1001-506X.2025.07.09

Abstract： In response to the degradation of radar pulse compresson performance due to false targets caused by interrupted sampling repeater jamming （ISRJ） and Doppler frequency shift caused by motion of high-speed target，a design method for high Doppler tolerance waveform set which is based on the composite modulation of linear frequency modulation-discrete phase coding （LFM-DPC） is proposed. Within a certain range of Doppler frequency shifts，the optimization modelis formulated byminimizing the sidelobe energy of the auto ambiguity functionof the unrepeated signal and the energy of the cross-ambiguity function between the unrepeated signal and the repeated signal. Then an iterative algorithm based on the KKT（Karush-Kuhn-Tucker） optimality condition is designed to solve the model. Simulation experiments show thatcompared to genetic algorithm（GA） and single modulation LFM signal and DPC signal，the LFM-DPC waveform set designed by the iterative optimization algorithm based on KKT optimality conditions has better performance in anti-ISRJ.

Keywords ： interupted sampling repeater jamming （ISRJ）; linear frequency modulation and discrete phase coding （LFM-DPC） waveform set；Doppler tolerance；KKT（Karush-Kuhn-Tucker）condition；ambiguity function

0 引言

间歇采样转发干扰[1-3]（interrupted samplingrepeaterjamming，ISRJ是一种基于数字射频存储器4（digitalradiofrequencymemory，DRFM）的高灵敏度相干干扰方式，其干扰原理是利用欠采样技术对雷达信号进行交替采样和转发，在接收端经过匹配滤波后形成多个虚假目标，以此来实现欺骗干扰的效果[5]。（剩余17047字）