摘要
针对多输入多输出(Multiple Input Multiple Output,MIMO)雷达正交波形的低截获概率(Low Probability of Intercept,LPI)设计,提出了以伯努利混沌序列为基础建立MIMO雷达多相编码波形库,用KL距离(Kullback-Leibler Divergence,KLD)从波形库中选取LPI波形的设计方法。首先,利用伯努利混沌序列具有均匀分布且其相关性随长度变化保持稳定的特性,采用自相关峰值旁瓣(Peak Side Lobe,PSL)与互相关峰值(Cross Correlation Peak,CCP)顺序最小化的方法,对生成的伯努利混沌序列进行多相编码量化,建立满足PSL与CCP最小化的多相编码波形库。然后,将高斯白噪声的分布特性作为LPI波形设计的逼近目标,采用KLD评估多相编码波形与高斯白噪声的相似性,并从建立的波形库中选取满足LPI特性的MIMO雷达多相编码LPI波形。仿真对比表明,基于伯努利混沌序列与KLD选取的MIMO雷达多相编码LPI波形具有良好的PSL与CCP最小化性能。
As for the low probability of intercept(LPI)design of MIMO radar orthogonal waveforms,this paper proposes a design method for picking up LPI waveforms from the MIMO radar polyphase encoding waveform library based on Bernoulli chaotic sequences using Kullback-Leibler Divergence(KLD).Firstly,utilizing the uniform distribution and stable correlation with length of Bernoulli chaotic sequences,a method of minimizing autocorrelation peak sidelobe(PSL)and minimizing cross correlation peak(CCP)in order is adopted to quantify polyphase codes on the generated Bernoulli chaos sequences,and establish a polyphase coded waveform library that meets the minimization of PSL and CCP.Then,taking the distribution characteristics of Gaussian white noise as best LPI waveform,KLD is used to evaluate the similarity between polyphase coded waveform and Gaussian white noise,and MIMO radar polyphase coded LPI waveform satisfying LPI characteristics is picked up from the established waveform library.Simulation comparison shows that the MIMO radar polyphase encoded LPI waveform based on Bernoulli chaotic sequence and KLD pick up has good PSL and CCP minimization performance.
作者
田晨
管洋阳
戴春亮
姬学斌
TIAN Chen;GUAN Yangyang;DAI Chunliang;JI Xuebin(Shenyang Aircraft Design&Research Institute,Shenyang 110035,China;National Key Laboratory of Electromagnetic Information Control and Effects,Shenyang 110035,China)
出处
《飞机设计》
2025年第6期73-80,共8页
Aircraft Design
关键词
低截获概率
MIMO雷达
混沌
low probability of interception
MIMO radar
chaos
