A 2D-DOA Estimation Algorithm for Double L-Shaped Array in Unknown Sound Velocity Environment

Gengxin NING  Shenjie JIANG  Xuejin ZHAO  Cui YANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E103-B   No.3   pp.240-246
Publication Date: 2020/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019EBP3007
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
unknown sound velocity environment,  underwater 2D-DOA,  double L-shaped array,  parameter pairing,  

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Summary: 
This paper presents a two-dimensional (2D) DOA algorithm for double L-shaped arrays. The algorithm is applied to the underwater environment for eliminating the performance error caused by the sound speed uncertainty factor. By introducing the third dimensional array, the algorithm eliminates the sound velocity variable in the depression angle expression, so that the DOA estimation no longer considering the true value of unknown sound velocity. In order to determine the parameters of a three-dimensional array, a parameter matching method with the double L-shaped array is also proposed. Simulations show that the proposed algorithm outperforms the conventional 2D-DOA estimation algorithm in unknown sound velocity environment.