DOA estimation and mutual coupling calibration with the SAGE algorithm

作者：Xiong Kunlai; Liu Zhangmeng^*; Liu Zheng; Jiang Wenli

来源：Chinese Journal of Aeronautics, 2014, 27(6): 1538-1543.

DOI：10.1016/j.cja.2014.10.020

• Array self-calibration
• Convergence
• Direction of arrival estimation
• Mutual coupling
• Space alternating generalized expectation-maximization algorithm

In this paper, a novel algorithm is presented for direction of arrival (DOA) estimation and array self-calibration in the presence of unknown mutual coupling. In order to highlight the relationship between the array output and mutual coupling coefficients, we present a novel model of the array output with the unknown mutual coupling coefficients. Based on this model, we use the space alternating generalized expectation-maximization (SAGE) algorithm to jointly estimate the DOA parameters and the mutual coupling coefficients. Unlike many existing counterparts, our method requires neither calibration sources nor initial calibration information. At the same time, our proposed method inherits the characteristics of good convergence and high estimation precision of the SAGE algorithm. By numerical experiments we demonstrate that our proposed method outperforms the existing method for DOA estimation and mutual coupling calibration.

• 出版日期2014-12
• 单位中国人民解放军国防科学技术大学