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Mutual Coupling Compensation for an Antenna Array and Direction Of Arrival Estimation Using ESPRIT  

Hong, Jeong-Geun ((주)한화 종합연구소)
Ahn, Woo-Hyun (충북대학교 전자공학과)
Seo, Bo-Seok (충북대학교 컴퓨터정보통신연구소)
Publication Information
Journal of Satellite, Information and Communications / v.8, no.4, 2013 , pp. 37-42 More about this Journal
Abstract
In this paper, we propose a compensation method of a non-ideal antenna array and a computationally efficient estimation method of the direction of arrival (DOA) for the antenna array. For DOA estimation, an antenna array is essential. By using the phase difference between the output signals of antennas, we can derive the DOA. In practice, however, mutual coupling between the elements of an antenna array change the beam pattern of each element and degrade the performance of DOA estimation. In the proposed method, we first estimate the DOA for the mid-subarray of the array, where all elements undergo relatively same coupling effect. We use the estimation of signal parameters via rotational invariance techniques (ESPRIT) algorithm to estimate the DOA. Then, we expand the array based on the estimated DOA by compensating the coupling effect. Simulation results show that the proposed method is effective when jamming to noise power ratio (JNR)is relative low.
Keywords
antenna array; mutual coupling; ESPRIT; direction of arrival (DOA) estimation;
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