Performance Analysis of Direction of Arrival Estimation under Different Uniform Circular Arrays
ZHOU Shuang
ZHOU Li
Abstract：The uniform circular array being capable of two-dimensional direction of arrival(DOA)estima-tion,suitable for wideband scenarios,and easy to deploy,the widely application is made in civilian,mili-tary,and astronomical detection fields.In response to the need for two-dimensional high-resolution DOA estimation in the frequency range of 0.8 to 6 GHz,optimization design and comparative analysis of the DOA estimation performance of uniform circular array models based on the multiple signal classification(MUSIC)algorithm are conducted to determine the optimal array configuration.The structures of the non-centered circular array and the centered circular array models are introduced.The theoretical influence of circular array forms on direction-finding is derived.The simulation experiments are conducted by using the MUSIC algorithm.The DOA estimation accuracy of five array models,including non-centered 7-circu-lar array,non-centered 8-circular array,non-centered 9-circular array,centered 8-circular array,centered 9-circular array,and centered 10-circular array,under different signal-to-noise ratios(SNR),sampling rates,and radius-to-wavelength ratios,is compared.A comprehensive analysis is conducted with perform-ance indicators such as beamwidth,resolution,and others simultaneously.The results show that for high-precision two-dimensional DOA estimation requirements in the 0.8 to 6 GHz frequency band,the centered 8-circular array achieves very good results in the direction-finding performance.
Keywords：direction of arrival(DOA)estimationuniform circular arraysmultiple signal classification(MUSIC)algorithmcentered circular arraynon-centered circular array
Publication Date：2025-04-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 46-54 )