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2-D DOA estimation in case of unknown mutual coupling for multipath signals
Date
2016-01-01
Author
Filik, Tansu
Tuncer, Temel Engin
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This work is licensed under a
Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License
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In this paper, two dimensional (2-D) direction-of-arrival (DOA) estimation problem in case of unknown mutual coupling and multipath signals is investigated for antenna arrays. A new technique is proposed which uses a special array structure consisting of parallel uniform linear array (PULA). PULA structure is complemented with auxiliary antennas in order to have a structured mutual coupling matrix (MCM). MCM has a symmetric banded Toeplitz structure which allows the application of the ESPRIT algorithm for 2-D paired DOA estimation. The advantage of the PULA structure is exploited by dividing it into overlapping linear sub-arrays (triplets) and spatial smoothing is employed to mitigate multipath signals. Closed form expressions are presented for search-free, paired and unambiguous 2-D DOA estimation. Two algorithms PULA-1 and PULA-2 are proposed to effectively solve the problem. Several simulations are done and the accuracy of the proposed solution is shown.
Subject Keywords
Parallel uniform linear array
,
Multipath
,
Mutual coupling
,
2-D direction-of-arrival estimation
,
Antenna array
URI
https://hdl.handle.net/11511/56962
Journal
MULTIDIMENSIONAL SYSTEMS AND SIGNAL PROCESSING
DOI
https://doi.org/10.1007/s11045-014-0290-7
Collections
Department of Electrical and Electronics Engineering, Article