CAJ | 학술논문

针对传统波达方向估计算法在低信噪比条件下性能表现不佳的问题，本文提出了一种基于改进多信号分类的波达方向估计算法。本文首先对多信号分类算法的不足进行分析，并采用时间平滑技术构建相关矩阵，然后采用相关矩阵建立空间谱函数达到波达方向估计，最后采用仿真实验对算法的性能进行测试。结果表明，本文算法可以快速准确的估计出多个信号的波达方向，降低了波达方向估计误差，而且性能远远优于其它改进多信号分类算法。
침대전통파체방향고계산법재저신조비조건하성능표현불가적문제，본문제출료일충기우개진다신호분류적파체방향고계산법。본문수선대다신호분류산법적불족진행분석，병채용시간평활기술구건상관구진，연후채용상관구진건립공간보함수체도파체방향고계，최후채용방진실험대산법적성능진행측시。결과표명，본문산법가이쾌속준학적고계출다개신호적파체방향，강저료파체방향고계오차，이차성능원원우우기타개진다신호분류산법。
Traditional algorithm of direction of arrival estimation in low SNR ratio conditions poor performance problems, an estimation algorithm for direction of arrival based on improved MUSIC algorithm is proposed in this paper. Firstly the shortcomings of multiple signal classification algorithm is analyzed, and temporal smoothing tech-nique is used to construct the correlation matrix, and then correlation matrix is used to construct spectral function and estimate direction of arrival, finally the performance of the algorithm is tested by the simulation experiment. The results show that, the proposed algorithm can rapidly and accurately estimate the direction of arrival for multiple sig-nals, direction of arrival estimation error is reduced, and the performance is superior to the other modified multiple signal classification algorithm.