A Low Complexity Algorithm for Direction of Arrival Estimation With Direction-Dependent Mutual Coupling

In this letter, a novel low complexity algorithm with two variants is proposed for improving the efficiency of direction of arrival (DOA) estimation with direction-dependent mutual coupling. In uniform linear array, the special structure of mutual coupling matrix (MCM), which is a banded symmetric T...

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Bibliographic Details
Published in:IEEE communications letters Vol. 24; no. 1; pp. 90 - 94
Main Authors: Ge, Qichao, Zhang, Yongshun, Wang, Yizhe
Format: Journal Article
Language:English
Published: New York IEEE 01.01.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
Algorithms
Approximation algorithms
Complexity
Computational geometry
Computer simulation
Construction
Convexity
Coupling coefficients
Covariance matrices
Direction of arrival
direction-dependent
Direction-of-arrival estimation
Estimation
Linear arrays
Mathematical analysis
Matrix methods
Mutual coupling
Optimization
Orthogonality
Signal processing algorithms
Symmetric matrices
uniform linear array
ISSN:1089-7798, 1558-2558
Online Access:Get full text
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Summary:In this letter, a novel low complexity algorithm with two variants is proposed for improving the efficiency of direction of arrival (DOA) estimation with direction-dependent mutual coupling. In uniform linear array, the special structure of mutual coupling matrix (MCM), which is a banded symmetric Toeplitz matrix, is exploited in the proposed method. A new transformation is constructed using the structural characteristics of the MCM, and two spectral functions are constructed via the orthogonality of the transformed matrix and the noise subspace. Finally, the two spectral functions are utilized to obtain the DOAs of sources by searching spectrum peaks. The proposed method avoids estimating multiple mutual coupling coefficients and iteratively solving convex optimization problem. The validity and superiority of the novel algorithm in conditions of direction-dependent mutual coupling is demonstrated in the simulations.
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ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2019.2950029