Blind 2D-DOA Estimation for Uniform Circular Array

A novel blind 2D-DOA estimation method in the uniform circular array based on parallel factor analysis is presented in this paper. Oversampled signal of array antennas is processed by fast Fourier transform, and shows that the Fourier transformed signal has trilinear model characteristics. Parallel factor analysis-based DOA estimation algorithm for the uniform circular array is proposed. This algorithm uses the trilinear decomposition to estimate the direction matrix, and employs the direction matrix characteristics and least squares principle to estimate the DOAs. The simulation results reveal that this algorithm has the better DOA estimation performance, and it works well in the small sampling.