基于遗传算法的多相码设计及旁瓣抑制  

Design of Random Poly-phase Sequence Based on Adaptive Genetic Algorithm

作　　者：肖靖[1] 杨文军[1] 齐无江 XIAO Jing;YANG Wengjun;QI Wujiang(Nanjing Research Institute of Electronics Technology, Nanjing 210039, China;The Unit 95928 of PLA, Linyi 276216, China)

机构地区：[1]南京电子技术研究所,南京210039 [2]解放军95928部队,山东临沂276216

出　　处：《现代雷达》2018年第4期18-20,43,共4页Modern Radar

摘　　要：由于信号波形的“随机性”易于实现“捷变”，多相码序列在一定程度上可以提高雷达系统的抗截获能力，在雷达系统中得到广泛应用。文中采用自适应遗传算法进行全局搜索来优化多相码设计，以获得主副瓣比接近理论最优的多相编码。针对小时带宽积相位编码信号高脉压副瓣的特点，提出基于迭代加权最小二乘算法的预失配滤波器设计方法，从而降低多相码序列的脉压副瓣并扩展多普勒容限。通过仿真分析，验证了该方法的可行性及有效性。The poly-phase sequence is widely applied to the radar system due to its randomicity,which can increase the anti-inter- ception capability of the radar system to a certain extent. The adaptive genetic algorithm is introduced in this paper to optimize the ply-phase codes by global searching. On account of its high pulse compression sidelobes of the poly-phase sequence in small time- bandwidth product, the iteratively reweighted least-square mismatched filter design is proposed to expand Doppler tolerance and further suppress the sidelobes. The feasibility and validity of the method is demonstrated by results of simulations.

关 键 词：多相码序列 抗截获 自适应遗传算法 脉压副瓣 迭代加权最小二乘 预失配滤波 多普勒容限 

分 类 号：TN957[电子电信—信号与信息处理]