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Sensors 2017, 17(10), 2241; https://doi.org/10.3390/s17102241

Real-Valued 2D MUSIC Algorithm Based on Modified Forward/Backward Averaging Using an Arbitrary Centrosymmetric Polarization Sensitive Array

1
College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China
2
Beijing Institute of Computer Technology and Application, Beijing 100854, China
*
Author to whom correspondence should be addressed.
Received: 9 July 2017 / Revised: 19 September 2017 / Accepted: 24 September 2017 / Published: 29 September 2017
(This article belongs to the Section Physical Sensors)
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Abstract

Two-dimensional multiple signal classification (MUSIC) algorithm based on polarization sensitive array (PSA) has excellent performance. However, it suffers a high computational complexity due to a multitude of complex operations. In this paper, we propose a real-valued two-dimensional MUSIC algorithm based on conjugate centrosymmetric signal model, which is applicable to arbitrary centrosymmetric polarization sensitive array. The modified forward/backward averaging, which can be applied to the PSA, is presented. Hence, the eigen-decomposition analysis process and spectrum function computation are converted into real domain, prominently reducing the computational complexity. Then, the direction-of-arrival (DOA) estimation is decoupled from the polarization parameter estimation so that the four-dimensional spectral peak search process is avoided. The theoretical computational complexity is discussed and the Cramer-Rao bound (CRB) of DOA estimation is derived in this paper. The simulation results indicate that the proposed algorithm achieves superior accuracy in DOA estimation and has low computational complexity. View Full-Text
Keywords: 2D DOA estimation; polarization sensitive array; MUSIC; forward/backward averaging; real-valued operations; dimension reduction; Cramer-Rao bound 2D DOA estimation; polarization sensitive array; MUSIC; forward/backward averaging; real-valued operations; dimension reduction; Cramer-Rao bound
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Si, W.; Wang, Y.; Hou, C.; Wang, H. Real-Valued 2D MUSIC Algorithm Based on Modified Forward/Backward Averaging Using an Arbitrary Centrosymmetric Polarization Sensitive Array. Sensors 2017, 17, 2241.

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