DOA ESTIMATION USING A SPARSE LINEAR MODEL BASED ON EIGENVECTORS

摘要

To reduce high computational cost of existing Direction-Of-Arrival (DOA) estimation techniques within a sparse representation framework,a novel method with low computational complexity is proposed.Firstly,a sparse linear model constructed from the eigenvectors of covariance matrix of array received signals is built.Then based on the FOCal Underdetermined System Solver (FOCUSS) algorithm,a sparse solution finding algorithm to solve the model is developed.Compared with other state-of-the-art methods using a sparse representation,our approach also can resolve closely and highly correlated sources without a priori knowledge of the number of sources.However,our method has lower computational complexity and performs better in low Signal-to-Noise Ratio (SNR).Lastly,the performance of the proposed method is illustrated by computer simulations.