Direction of Arrival Estimation of Coherent Sources in Uniform Circular Arrays Using an Iterative Method | ||
| Journal of Communication Engineering | ||
| مقاله 12، دوره 10، شماره 1 - شماره پیاپی 20، فروردین 2021، صفحه 158-181 اصل مقاله (1.93 M) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22070/jce.2022.16895.1223 | ||
| نویسندگان | ||
| mahmoud ferdosizadeh* 1؛ Yasoub Eghbali2؛ Parisa Soleimani Salek2 | ||
| 1shahed | ||
| 2Department of Electrical Engineering, Shahed University, Tehran, Iran | ||
| چکیده | ||
| In this paper, an iterative algorithm for direction of arrival (DoA) estimation of coherent sources with a uniform circular array (UCA) is proposed. There is an additional error in the DoA estimation of signals after mapping UCA to virtual uniform linear array (VULA), due to approximation of beamspace transformation. This error depends on the direction of emitters. In the proposed algorithm, the dominant term of error is reduced using two beamformers. Then, the DoA of coherent sources are estimated by construction of Toeplitz covariance matrix and using the MUSIC algorithm. The processes of DoA estimation and reduction of the approximation error are done iteratively. Also, an analytical expression is derived for the approximation of bias for DoA estimation of coherent sources. Simulation results show that the proposed algorithm has a better performance in comparison to the conventional methods. | ||
| کلیدواژهها | ||
| Direction of arrival (DoA) estimation؛ coherent sources؛ uniform circular array (UCA)؛ beamspace transformation (BT)؛ bias reduction | ||
| مراجع | ||
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