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International Journal of Antennas and Propagation
Volume 2016, Article ID 7832475, 9 pages
http://dx.doi.org/10.1155/2016/7832475
Research Article

DOA Estimation of Cylindrical Conformal Array Based on Geometric Algebra

Department of Electronic Science and Engineering, National University of Defense Technology, Deya Road 109, Changsha 410073, China

Received 7 July 2016; Revised 18 October 2016; Accepted 2 November 2016

Academic Editor: Youssef Nasser

Copyright © 2016 Minjie Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Due to the variable curvature of the conformal carrier, the pattern of each element has a different direction. The traditional method of analyzing the conformal array is to use the Euler rotation angle and its matrix representation. However, it is computationally demanding especially for irregular array structures. In this paper, we present a novel algorithm by combining the geometric algebra with Multiple Signal Classification (MUSIC), termed as GA-MUSIC, to solve the direction of arrival (DOA) for cylindrical conformal array. And on this basis, we derive the pattern and array manifold. Compared with the existing algorithms, our proposed one avoids the cumbersome matrix transformations and largely decreases the computational complexity. The simulation results verify the effectiveness of the proposed method.