基于改进遗传算法的子阵级数字波束形成方法

摘要

相控阵雷达系统中多采用子阵级数字波束形成技术来解决阵元级数字波束形成所面临的硬件系统复杂、实时性低及应用成本高等问题,但子阵级波束形成技术往往会破坏静态方向图的性能.为保证方向图性能,采用改进遗传算法对子阵级数字波束形成算法进行优化,即在给定子阵划分的条件下,提出一种基于改进遗传算法的子阵级数字波束形成方法.采用此方法分别针对子阵级加窗与阵元级加窗处理进行仿真,结果表明两种加窗处理均可产生满足指标要求的波束方向图.%A full digital beam-forming in large phased-array radar system has disadvantages of complex hardware, poor real time performance and high application cost. Thus, the digital beam-forming at subarray level is adopted. But the subarray beam-forming may decrease the performance of static pattern. To solve this problem this paper uses an improved genetic algorithm to optimize the subarray digital beam-forming pattern. Under the given conditions of subarray partition, this paper presents a subarray digital beam-forming approach based on improved genetic algorithm. The weights excitation is done at subarray level and element level respectively in the digital beam-forming simulations. The results show that both of these two types of weights excitation can realize satisfied patterns.