基于遗传算法搜索低旁瓣最大长度序列  

Searching low sidelobes maximal length sequence based on genetic algorithm

作　　者：何飞[1] 刘肃[1] 张立军[2] 鲁辉[2] 郑占旗[2] 廖先华[1] 

机构地区：[1]兰州大学物理科学与技术学院,兰州730000 [2]中国科学院微电子研究所,北京100029

出　　处：《计算机应用研究》2012年第10期3629-3631,共3页Application Research of Computers

基　　金：国家"973"计划资助项目(2010CB327506)

摘　　要：最大长度序列通过线性反馈移位寄存器产生,广泛应用于脉冲压缩雷达中。针对不同反馈连接产生序列的非周期自相关函数旁瓣特性不同,而目前尚无有效办法寻找具有低旁瓣特性的最大长度序列,利用遗传算法搜索线性反馈移位寄存器的最佳反馈连接,该反馈连接产生最大长度序列非周期自相关函数特性非常好。通过MATLAB仿真了遗传算法搜索过程、最大长度序列非周期自相关函数,给出了4～15级线性反馈移位寄存器反馈连接表,并对最大长度序列非周期自相关函数进行加窗处理,获得了更好的旁瓣抑制效果。Maximal length sequences that generated by linear feedback shift register,widely used in pulse compression radar.For sequences of different feedback have different sidelobe characteristics of aperiodic autocorrelation function,currently,there is no effective way to find the maximum length sequence with a low sidelobe characteristics.This paper searched the best feedback of linear feedback shift register.The aperiodic autocorrelation function characteristics of maximal length sequence were very good generated by this feedback.It used MATLAB to simulate the search process of genetic algorithm,aperiodic autocorrelation function of maximal length sequence,gave 4~15 feedback table of linear feedback shift register.And it used windowing in aperiodic autocorrelation function of maximal length sequence,obtained a lower side-lobe level.

关 键 词：最大长度序列 自相关函数 线性反馈移位寄存器 遗传算法 脉冲压缩 

分 类 号：TN957[电子电信—信号与信息处理]