LFM-DPC抗間歇采樣轉(zhuǎn)發(fā)干擾波形集設(shè)計(jì)算法

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關(guān)鍵詞：間歇采樣轉(zhuǎn)發(fā)干擾；線性調(diào)頻-離散相位編碼波形集；多普勒容限；KKT條件；模糊函數(shù) 中圖分類號(hào)：TN95 文獻(xiàn)標(biāo)志碼：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

間歇采樣轉(zhuǎn)發(fā)干擾[1-3]（interrupted samplingrepeaterjamming，ISRJ是一種基于數(shù)字射頻存儲(chǔ)器4（digitalradiofrequencymemory，DRFM）的高靈敏度相干干擾方式，其干擾原理是利用欠采樣技術(shù)對(duì)雷達(dá)信號(hào)進(jìn)行交替采樣和轉(zhuǎn)發(fā)，在接收端經(jīng)過(guò)匹配濾波后形成多個(gè)虛假目標(biāo)，以此來(lái)實(shí)現(xiàn)欺騙干擾的效果[5]。（剩余17047字）