Joint Frequency, 2-D DOA and Range Estimation of Near Field Sources

A new algorithm for jointly estimating the frequency, two-dimensional (2-D) direction of arrival (DOA) and range of near field sources is proposed. The proposed approach requires only four cumulant matrixes and two eigenvalue decomposition to estimate the four parameters and does not require searching for spectral peak or pairing among parameters. The proposed algorithm can be applied in arbitrary Gaussian noise environment since it is based on the fourth-order cumulants. In addition, using Non-symmetrical cross array structure in the paper, the aperture loss is reduced. The performance of the proposed method is evaluated by some numerical simulation.