基于改进聚焦矩阵算法宽带信号测向研究  

Research on direction finding of broadband signal based on improved focus matrix algorithm

作　　者：李雪静[1] LI Xuejing(Electronic Engineering Department,Zhangzhou Institute of Technology,363000,Zhangzhou,Fujian,PRC)

机构地区：[1]漳州职业技术学院电子工程学院,福建省漳州市363000

出　　处：《曲阜师范大学学报（自然科学版）》2022年第1期89-93,共5页Journal of Qufu Normal University(Natural Science)

基　　金：福建省教育厅中青年教师教育科研项目(JAT191419);福建省中青年教师教育科研项目(JAT210844)。

摘　　要：针对CSM算法预估信号,存在DOA估计误差的问题进行研究,提出运用解相干空间平滑技术对宽带信号进行矩阵重构,进而构造酉聚焦矩阵,将各频率点下阵列流变换到同一频率点上,进行DOA估计.仿真结果表明,经过前后向平滑处理,改进聚焦变换矩阵的方法,不需要对来波信号方位角预估,就能高精度、稳健的估计来波方向,且计算量少.Aiming at the problem of DOA estimation error in the estimation of signal by CSM algorithm,this paper proposes to reconstruct the matrix of broadband signal by using decoherent spatial smoothing technology,and then construct the unitary focusing matrix to transform the array rheology at each frequency point to the same frequency point for DOA estimation.After forward and backward smoothing,the method of improving the focus transformation matrix can estimate the incoming wave direction with high precision and robustness without estimating the azimuth of the incoming wave signal,and the amount of calculation is less.

关 键 词：均匀线阵 DOA估计 宽带信号 聚焦矩阵 空间平滑 

分 类 号：TN911.7[电子电信—通信与信息系统]