基于均匀圆阵伪协方差矩阵的单快拍测向方法

Single snapshot direction finding method with pseudo-covariance matrix based on uniform circular arrays

传统的单快拍测向算法只适用于具有Vandermonde形式的阵列流型,均匀圆阵的阵列流型不具有Vandermonde矩阵结构,因此大部分基于线阵的伪协方差矩阵的构造方法无法直接适用于均匀圆阵。针对该问题,从侦察方的角度对波达方向(direction of arrival,DOA)估计算法进行了研究,改进了伪协方差矩阵的构造方法,提出了一种基于均匀圆阵的单快拍测向算法。通过与模式空间前后向平滑(mode forward-backward spatial smoothing,MODE-FBSS)算法的对比仿真,验证了算法的有效性,证实了所提方法的性能优于MODE-FBSS算法。

The traditional single snapshot direction finding algorithm is only applicable to the array manifold with Vandermonde form.And the array manifold of uniform circular array does not have Vandermonde matrix structure,so that most methods of constructing pseudo-covariance matrix which are suitable for linear array,cannot be directly used to solve the related problems based on uniform circular array.To solve this problem,the direction of arrival(DOA)estimation algorithm from the scout’s point of view is studied,the method of constructing pseudo-covariance matrix is improved,and a single snapshot direction finding algorithm based on uniform circular array is proposed.Compared with the mode forward-backward spatial smoothing(MODEFBSS)method,the simulation results show that the algorithm is effective and the performance of the proposed method is better than that of the MODE-FBSS method.