摘要
空间谱估计是阵列信号处理中的一个重要研究课题。针对经典MUSIC算法在入射源相关的情况下测向失败的问题,通过前后向空间平滑MUSIC算法,利用子阵平滑恢复数据协方差矩阵的原理进行解相干,进而对入射源的波达方向(DOA)进行估计。仿真结果证明:前后向空间平滑算法不仅能估计出空间相互独立信号源的波达方向,还能有效分辨出相干信源的到达角度,且具有较高的分辨能力和估计精度。
The space spectrum estimation is an important research subject in the array signal processing.Aiming at the problem that the direction-finding by the traditional MUSIC algorithm may fail when the incident sources are correlative,this paper utilizes the theory of refreshing the data covariance matrix subarray smoothing to perform decorrelation by means of the forward/back spatial smoothing MUSIC algorithm,thereby estimate the direction of arrival（DOA） of incident sources.The simulation results prove that the forward/back spatial smoothing algorithm can not only estimate the DOA of the independent signals in the space,but also effectively distinguish the angle of arrival of coherent signal sources,and has better angular resolution capability and estimation precision.
出处
《舰船电子对抗》
2010年第6期114-117,共4页
Shipboard Electronic Countermeasure
关键词
相干信号
信号处理
空间谱估计
前后向空间平滑算法
coherent signal
signal processing
space spectrum estimation
forward/back spatial smoothing algorithm
