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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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

Collections

Department of Electrical and Electronics Engineering, Article