A Low-Complexity DOA and Polarization Method of Polarization-Sensitive Array

Wen Dong; Ming Diao; Lipeng Gao; Lutao Liu

doi:10.3390/s17051170

A Low-Complexity DOA and Polarization Method of Polarization-Sensitive Array

Sensors (Basel). 2017 May 20;17(5):1170. doi: 10.3390/s17051170.

Authors

Wen Dong¹, Ming Diao², Lipeng Gao³, Lutao Liu⁴

Affiliations

¹ College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China. a343720065@hrbeu.edu.cn.
² College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China. diaoming@hrbeu.edu.cn.
³ College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China. gaolipeng@hrbeu.edu.cn.
⁴ College of Information and Communication Engineering, Harbin Engineering University, Harbin 150001, China. liulutao@hrbeu.edu.cn.

Abstract

This paper proposes a low-complexity method to estimate the direction of arrival and polarization based on the polarization sensitive array (PSA) which is composed of cross-dipoles. We built a half-quaternions model through the Cayley-Dickson form to remove the redundant information. Then, the directions of arrival (DOAs) were estimated via the root-MUSIC algorithm. Finally, the polarizations were estimated by generalized eigenvalue method. Unlike some existing searching algorithms, such as multiple signal classification (MUSIC), this method can avoid the peak searching and maintains high estimation accuracy. Moreover, we use the oblique projection operators to filter out the interference signals which are decoys of the target signal. Simulation results demonstrate the effectiveness and favorable performance of the proposed method.

Keywords: DOA estimation; polarization estimation; polarization sensitive array (PSA); quaternion.