An Efficient Algorithm for Direction Finding against Unknown Mutual Coupling

Sensors

Weijiang Wang²  Shiwei Ren²  Yingtao Ding¹ 

[1] School of Information and Electronics, Beijing Institute of Technology, 5 South Zhongguancun Street, Haidian District, Beijing 100081, China;

关键词: direction of arrival;    mutual coupling;    subspace;    refinement;    iteratively;   

DOI  :  10.3390/s141120064

来源: mdpi

【 摘 要 】

In this paper, an algorithm of direction finding is proposed in the presence of unknown mutual coupling. The preliminary direction of arrival (DOA) is estimated using the whole array for high resolution. Further refinement can then be conducted by estimating the angularly dependent coefficients (ADCs) with the subspace theory. The mutual coupling coefficients are finally determined by solving the least squares problem with all of the ADCs utilized without discarding any. Simulation results show that the proposed method can achieve better performance at a low signal-to-noise ratio (SNR) with a small-sized array and is more robust, compared with the similar processes employing the initial DOA estimation and further improvement iteratively.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.