Joint estimation of 2D-DOA and frequency based on space-time matrix and conformal array

Liang-Tian Wan; Lu-Tao Liu; Wei-Jian Si; Zuo-Xi Tian

doi:10.1155/2013/463828

Joint estimation of 2D-DOA and frequency based on space-time matrix and conformal array

ScientificWorldJournal. 2013 Dec 15:2013:463828. doi: 10.1155/2013/463828. eCollection 2013.

Authors

Liang-Tian Wan¹, Lu-Tao Liu¹, Wei-Jian Si¹, Zuo-Xi Tian²

Affiliations

¹ Department of Information and Communication Engineering, University of Harbin Engineering, Harbin 150001, China.
² Science and Technology on Underwater Test and Control Laboratory, Dalian 116013, China.

Abstract

Each element in the conformal array has a different pattern, which leads to the performance deterioration of the conventional high resolution direction-of-arrival (DOA) algorithms. In this paper, a joint frequency and two-dimension DOA (2D-DOA) estimation algorithm for conformal array are proposed. The delay correlation function is used to suppress noise. Both spatial and time sampling are utilized to construct the spatial-time matrix. The frequency and 2D-DOA estimation are accomplished based on parallel factor (PARAFAC) analysis without spectral peak searching and parameter pairing. The proposed algorithm needs only four guiding elements with precise positions to estimate frequency and 2D-DOA. Other instrumental elements can be arranged flexibly on the surface of the carrier. Simulation results demonstrate the effectiveness of the proposed algorithm.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Algorithms*
Models, Theoretical*