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International Journal of Antennas and Propagation
Volume 2016, Article ID 8109013, 7 pages
Research Article

Blind Direction-of-Arrival Estimation with Uniform Circular Array in Presence of Mutual Coupling

Key Laboratory of Aerocraft Tracking Telemetering & Command and Communication, Ministry of Education, Chongqing University, Chongqing 400030, China

Received 3 November 2015; Revised 11 December 2015; Accepted 15 December 2015

Academic Editor: Shih Yuan Chen

Copyright © 2016 Song Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A blind direction-of-arrival (DOA) estimation algorithm based on the estimation of signal parameters via rotational invariance techniques (ESPRIT) is proposed for a uniform circular array (UCA) when strong electromagnetic mutual coupling is present. First, an updated UCA model with mutual coupling in a discrete Fourier transform (DFT) beam space is deduced, and the new manifold matrix is equal to the product of a centrosymmetric diagonal matrix and a Vandermonde-structure matrix. Then we carry out blind DOA estimation through a modified ESPRIT method, thus avoiding the need for spatial angular searching. In addition, two mutual coupling parameter estimation methods are presented after the DOAs have been estimated. Simulation results show that the new algorithm is reliable and effective especially for closely spaced signals.