Real-valued DOA estimation for uniform linear array with unknown mutual coupling

  • Authors:

  • Jisheng Dai;Weichao Xu;Dean Zhao

  • Affiliations:

  • School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China;Department of Automatic Control, Faculty of Automation, Guangdong University of Technology, Guangzhou 510006, China;School of Electrical and Information Engineering, Jiangsu University, Zhenjiang 212013, China

  • Venue:
  • Signal Processing
  • Year:
  • 2012

Quantified Score

Hi-index 0.08

Visualization

Abstract

In this paper, we propose a real-valued direction-of-arrival (DOA) estimation method for uniform linear arrays (ULAs) in the presence of unknown mutual coupling. By taking advantage of the special structure of the mutual coupling matrix for ULAs, the effect of mutual coupling is eliminated by the inherent mechanism of the proposed method. Moreover, the computational complexity is reduced by a factor of at least four after further performing a unitary transformation capable of converting a complex covariance matrix into a real one. We also investigate the performance loss due to the imperfect structure of the mutual coupling matrix under the NEC-2 code. Experimental results with respect to the NEC-2 code illustrate that our new method even outperforms a state-of-the-art method in the literature.