A high resolution array processing for frequencies estimation and location of sources

A separable approach based on a space-time two dimensional data matrix from the finite distance of sources using a equi-spaced line array is proposed. By using the time covariance matrix,the frequencies of multiple sources can be obtained. By using the reconstructed far-field approximation space covariance matrix at the same bearings from the revised near-field space covariance matrix, the bearings of multiple sources can be obtained. The method can be applied to locate sources by change position of the array center. The simulation and experiment results support the theoretical predications.