The Research of Uniform Circular Array DOA Algorithms

摘要

We propose UCA Direction of Arrival algorithm model under a noisy and broadband condition.Firstly,array virtual pan along the axial direction,by Spatial smoothing techniques deal with data aims to restore the rank of the covariance matrix,to achieve signal decoherence.The broadband signal into N nonoverlapping progeny signal and Fourier transform in order to narrow-band signal analysis.While the circular array into line array,according to the structural characteristics of linear array construct DOA matrix.Finally,all of the spatial spectrum estimation will be the arithmetic average,complete DOA estimates.This process noise and wideband signals together,avoiding the disadvantages of a small amount of the information contained in the narrowband signal,has practical significance.