一种低复杂度高精度测向新方法  

A novel low-complexity and high-precision direction-finding method

作　　者：曾富红 彭占立 司伟建[2] ZENG Fuhong;PENG Zhanli;SI Weijian(Nanjing Corad Electronic Equipment Co.,Ltd.,Nanjing 211100;School of Information and Communication Engineering,Harbin Engineering University,Harbin 150001,China)

机构地区：[1]南京科瑞达电子装备有限责任公司,南京211100 [2]哈尔滨工程大学信息与通信工程学院,哈尔滨150001

出　　处：《雷达与对抗》2024年第3期6-9,45,共5页Radar & ECM

基　　金：国防科技173计划技术领域基金项目(2022-173ZD-010);航空科学基金项目(2019010P6001,2019010P6002)。

摘　　要：针对传统MUSIC方法测角误差、计算复杂度分别与网格搜索间隔成正、反比关系这一矛盾,提出一种低复杂度高精度测向新方法。通过应用波束形成方法确定信号的粗略方向,缩小谱峰搜索范围,降低谱峰搜索计算量。同时结合信号子空间与噪声子空间的正交性弥补谱峰搜索步长设定带来的固有偏差,从而在不需降低谱峰搜索步长的情况下提高测向精度,实现低复杂度高精度测向的目的。仿真实验结果证明了该方法的有效性及优越性。Considering the contradiction that the angular error and computational complexity of the conventional MUSIC method are directly and inversely proportional to the grid search interval respectively,this paper proposes a novel low-complexity and high-precision direction-finding method.This method narrows the spectral peak search range and reduces the computational amount of the spectral peak search by applying the beamforming method to determine approximate signal direction.At the same time,the orthogonality of the signal and noise subspaces is combined to make up for the inherent bias brought about by the setting of the spectral peak search step,thus improving the direction-finding accuracy without reducing the spectral peak search step,and realizing low-complexity and high-precision direction finding.The simulation experiment results prove the effectiveness and superiority of the method.

关 键 词：测向 低复杂度 高精度 谱峰搜索步长 固有偏差 

分 类 号：TP20[自动化与计算机技术—检测技术与自动化装置]