Third-Order Cyclic Moment Based DOA and Range Estimation of Near-Field Sources

A new method based on third-order cyclic moment is presented for the directions-of-arrival (DOA´s) and range estimations of near-field sources. By exploiting the cyclostationarity and space-time information of the signals, the parameters are directly given by the eigendecomposition of certain constructed DOA-matrix. Compared with several existing approaches, the loss of array aperture is voided since the proposed method doesn´t need a symmetrical array. Moreover, the proposed method can effectively suppress the additive stationary noises with any distribution and interfering signal with different cyclic frequency. Numerical simulations illustrate the effectiveness of the proposed algorithm