一种基于面阵的相干信源DOA估计算法

摘要

Because of the complexity of propagation environment,there are multipath signals among the signals arriving the array. In the multipath environment,coherent signal source brings the pretermission of DOA estimation. Firstly,the mathematics models of uni-form plane array and coherent signal source are built,then the effect of coherent signal sources on the order of covariance matrix is reduced by re-constructing the covariance matrix. Finally,DOA of signal source is estimated by the 2D multiple signal classification (2D-MUSIC)algorithm. Based on the 2D-MUSIC algorithm,the modified 2D-MUSIC (M-2D-MUSIC)algorithm is proposed. The avail-ability and performance of the M-2D-MUSIC algorithm is verified by computer simulation.%由于传播环境的复杂性，入射到阵列的信号中有多径信号存在。在多径环境中，相干信源会造成波达方向（Direction of Arrival，DOA）估计的漏报。对面阵及相干信源进行数学建模，通过对接收信号协方差矩阵进行矩阵重构以降