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Sensors 2017, 17(6), 1269; doi:10.3390/s17061269

Computationally Efficient Direction Finding for a Mixture of Circular and Strictly Noncircular Sources with Uniform Rectangular Arrays

1
School of Electrical Information Engineering, Tianjin University, 92 Weijin Road, Tianjin 300072, China
2
Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211, China
3
School of Software, Qufu Normal University, Qufu 273165, China
4
School of Computer and Control Engineering, Yantai University, Yantai 264005, China
*
Author to whom correspondence should be addressed.
Received: 22 February 2017 / Revised: 26 May 2017 / Accepted: 27 May 2017 / Published: 2 June 2017
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Abstract

In this paper, a novel two-dimensional (2D) direction-of-arrival (DOA) estimation algorithm for the mixed circular and strictly noncircular sources is proposed. A general array model with a mixture of signals is firstly built based on uniform rectangular arrays (URAs), and then, the approach, which uses the rank-reduction-based ROOT-MUSIC, can solve 2D DOA estimation problem. Besides, the theoretical error of the proposed algorithm, a criterion of the performance for evaluation, is analyzed by the first-order Taylor expression using second-order statistics. As verified by the simulation results, a better DOA estimation performance and a lower computational complexity are achieved by the proposed algorithm than the existing methods resorting to the noncircularity of the incoming signals. View Full-Text
Keywords: 2D DOA estimation; uniform rectangular arrays; noncircular signals; ROOT-MUSIC; theoretical error; low complexity 2D DOA estimation; uniform rectangular arrays; noncircular signals; ROOT-MUSIC; theoretical error; low complexity
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Wang, Q.; Zhu, X.; Chen, H.; Wang, L.; Yan, W.; Fang, H. Computationally Efficient Direction Finding for a Mixture of Circular and Strictly Noncircular Sources with Uniform Rectangular Arrays. Sensors 2017, 17, 1269.

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