Blind DOA Estimation in the Presence of Mutual Coupling Using Uniform Linear Array
Hu Zeng-hui①③ Zhu Ju-bo② He Feng① Liang Dian-nong①
①(College of Electronic Science and Technology, National University of Defense Technology, Changsha 410073, China) ② (College of Science, National University of Defense Technology, Changsha 410073, China) ③(Jiuquan Satellite Launching Center, Jiuquan 732750, China)
Abstract：The performance of Direction-Of-Arrival (DOA) estimation of classical algorithms may degrade substantially in the presence of mutual coupling. In this paper, a blind source separation based algorithm is proposed for DOA estimation using uniform linear array. Firstly, the generalized array manifold matrix is estimated using blind source separation techniques; Then, based on the property that the mutual coupling matrix of uniform linear array can be modeled by a symmetric Toeplitz matrix, DOA estimation problem is transformed into multiple separable nonlinear least squares problems, and DOAs can be obtained by multiple one-dimensional peak searching. The proposed algorithm does not need multidimensional peak searching or multidimensional iteration, and imposes weaker constraints on the number of non-zero coefficients in the mutual coupling matrix. Besides, the proposed algorithm is applicable even if the number of non-zero coefficients in the mutual coupling matrix is unknown. Simulation results demonstrate the effectiveness of the proposed algorithm.
胡增辉, 朱炬波, 何峰, 梁甸农. 互耦条件下均匀线阵DOA盲估计[J]. 电子与信息学报, 2012, 34(2): 382-387.
Hu Zeng-Hui, Zhu Ju-Bo, He Feng, Liang Dian-Nong. Blind DOA Estimation in the Presence of Mutual Coupling Using Uniform Linear Array. , 2012, 34(2): 382-387.
2012, Vol. 34 
