Four-dimensional parameter estimation of near-field source using higher-order cumulant

We propose a novel joint estimation algorithm for range, frequency, and two-dimensional (2-D) direction-of-arrival (DOA) of each narrowband source in the near field. The proposed method constructs four matrices using the higher-order cumulants of the properly chosen sensor outputs, and forms three new ones using the four matrices, then estimates the source parameters from the new ones' eigenvalues and the corresponding eigenvectors. In comparison with the conventional methods, the proposed approach efficiently uses the array aperture, and pairs parameters automatically. Finally, the simulation results are presented to validate the performance of the proposed method.