Direction of Arrival Estimation of Coherent Sources in Uniform Circular Arrays Using an Iterative Method
محل انتشار: دوفصلنامه مهندسی مخابرات، دوره: 10، شماره: 1
سال انتشار: 1402
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 137
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شناسه ملی سند علمی:
JR_JCESH-10-1_012
تاریخ نمایه سازی: 15 اسفند 1401
چکیده مقاله:
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 estimationof 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 doneiteratively. 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.
کلیدواژه ها:
Direction of arrival (DoA) estimation ، coherent sources ، uniform circular array (UCA) ، beamspace transformation (BT) ، bias reduction
نویسندگان
mahmoud ferdosizadeh
shahed
Yasoub Eghbali
Department of Electrical Engineering, Shahed University, Tehran, Iran
Parisa Soleimani Salek
Department of Electrical Engineering, Shahed University, Tehran, Iran