Abstract
Direction Finding of UAV has become a crucial problem at present. Traditional radio direction finding technology includes amplitude comparison direction finding and interferometer direction finding. However, when encountering coherent signals from UAVs of the same model and manufacturer, these methods cannot obtain the direction of arrival correctly or distinguish between friend and foe. Several coherent signals will be regarded as a spatial incoming signal. In this paper, received signal of uniform circular array is converted into received signal of virtual linear array through Toeplitz transformation, and then the ROOT-MUSIC algorithm is used for direction finding. Experiments show that our method can effectively solve the UAV direction finding problem.
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