基于正交直线阵列的二维相干源测向方法

Approach to 2-D DOA estimation for coherent signals based on orthogonal linear array

针对特殊阵列,提出了一种二维相干信号波达方向估计新方法,此方法只需2个正交直线阵就可估计不同用户的二维DOA。而且利用其中的一个直线阵来组合两个线阵分别估计的一维DOA,在空间平滑法基础上通过构造新的协方差矩阵,进一步去除了信源间的相干性。并分析了相乘系数对DOA的估计性能的影响,最后通过仿真结果分析了该方法的性能。

This paper presents a new method for two-dimensional（2-D） direction-of-arrival（DOA） estimation of coherent signals with a special array.This method needs only two orthogonal linear arrays to estimate the 2-D DOA of different users.It uses one of the two linear arrays to pair the 1-D DOA which is estimated by the two linear arrays respectively.It constructs a new covariance matrix based on the spatial smoothing method to further resolve the coherence between the two signals.The influence of the coefficient on the DOA estimation is analyzed.The proposed method is validated by computer simulation.