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| 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) |
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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.
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Received: 10 March 2011
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Corresponding Authors:
Hu Zeng-hui
E-mail: zhhunudt@163.com
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2012, Vol. 34 
