A new method based on third-order cyclic moment is presented for the directions-of-arrival (DOA's) and ranges 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 DOAmatrix. 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.
In this paper, the joint estimation of direction-of-arrival (DOA), range and polarization of near field sources is investigated. The uniform linear array (ULA) considered here consists of orthogonal dipole-pairs, which measure the x-axis and y-axis components of the electric field of the polarized signals. Without spectral peak searching, the proposed algorithm gives a closed-form solution. Because using only second order statistics, this method reduces the calculating burden. Some numerical simulations illustrate the effectiveness of the proposed algorithm.
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