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Joint DOA and time delay estimation method for space-time coherent distributed signals based on search

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3 Author(s)
Bin, Qian ; Coll. of Electronic Engineering, Univ. of Electronic Science and Technology of China, Chengdu 610054, P.R. China ; Wanlin, Yang ; Qun, Wan

Under dense urban fading environment, performance of joint multi-path parameter estimation method based on traditional point signal model degrades seriously. In this paper, a new space and time signal model based on multipath distribution function is given after new space and time manifold is reconstructed. Then joint space-time signal subspace is obtained by converting acquired channel from time domain to frequency domain. Then space and time spectrum is formulated by the space sub-matrix and time sub-matrix taken out of joint space-time signal subspace, and parameters are estimated by searching the minimum eigenvalues of the space matrix and the time matrix. Lastly, A space and time parameters matching process is performed by using the orthogonal property between joint noise subspace and the space-time manifold. In contrast with tradition MUSIC, the algorithm we present here only need two 1-dimension searching and was not sensitive to different distribution function.

Published in:

Systems Engineering and Electronics, Journal of  (Volume:18 ,  Issue: 2 )