Joint frequency, direction of arrival and range estimation for near-field sources

In this paper, the problem of joint frequency, direction of arrival (DOA) and range estimation for near-field sources in array signal processing is addressed. Using the state-space realization approach, a subspace based estimation algorithm is proposed, which does not need any spectral peak searching and the 3-D parameters are automatically paired. Furthermore, the proposed method is applicable to arbitrary additive Gaussian noise environment. The effectiveness of the proposed algorithm is verified via computer simulations.