CAJ | 학술논문

压制干扰信号从主瓣进入雷达天线，会严重影响雷达的性能。通常的副瓣抗干扰技术难以奏效。本文首先给出了盲源分离应用于雷达抗主瓣干扰的信号模型，在此基础上提出了均匀噪声环境中，基于负熵最大化的快速固定点独立成分分析（Fast ICA）盲源分离算法，并用其分离接收到的干扰混合信号，最后脉压找出目标信号。仿真验证了算法用于抗主瓣干扰的有效性，并对其抗干扰性能进行了评价。仿真结果表明了算法良好的抗干扰性能，以及在分离效率上较明显的优势。
압제간우신호종주판진입뢰체천선，회엄중영향뢰체적성능。통상적부판항간우기술난이주효。본문수선급출료맹원분리응용우뢰체항주판간우적신호모형，재차기출상제출료균균조성배경중，기우부적최대화적쾌속고정점독립성분분석（Fast ICA）맹원분리산법，병용기분리접수도적간우혼합신호，최후맥압조출목표신호。방진험증료산법용우항주판간우적유효성，병대기항간우성능진행료평개。방진결과표명료산법량호적항간우성능，이급재분리효솔상교명현적우세。
If the suppress jamming pour into the malnlobe of radar antenna,it would severely degenerate the performance of radar.The common ECCM measures of sidelobe have no effect.In this paper,the signal model of malnlobe jamming suppression based on blind source separation algorithm is given first of all.Then the blind source separation algorithm of fast fixed point independent component analysis (ICA)in the uniform noise environment is proposed,which is used to sep-arate the mixed interference and target signal.And the target signal is found out by applying the pulse compression tech-nique between the transmitted target signal and the separated signal at last.Then some simulation experiment is finished to test the validity and to evaluate the performance of the malnlobe jamming suppression algorithm.The simulation results show the satisfactory validity of algorithm in the radar malnlobe jamming suppression and evident superiority in the efficien-cy of the separation.