一种基于面阵的相干信源DOA估计算法  

An Algorithm of Direction of Arrival Estimation for Plane Array with Coherent Signal Source

作　　者：闫康[1] 孙志刚[1] 郭肃丽[1] 

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2013年第10期22-24,共3页Radio Engineering

摘　　要：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低相干信源对协方差矩阵秩的影响,最终通过二维多重信号分类(2D Multiple Signal Classification,2D-MUSIC)算法对信源波达方向进行估计,提出了改进的二维多重信号分类(Modified 2D Multiple Signal Classification,M-2D-MUSIC)算法,计算机仿真验证了所提算法的有效性与性能。Because of the complexity of propagation environment,there are muhipath signals among the signals arriving the array. In the muhipath 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 bv comnuter simulation.

关 键 词：均匀面阵 相干信源 多重信号分类 矩阵重构 波达方向 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]