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A New Method for Fast Multi-target Localization in Bistatic MIMO Radar |
Cheng Yuan-bing Gu Hong Su Wei-min |
School of Electronic Engineering and Optoelectronic Technology, Nanjing University of Science and Technology, Nanjing 210094, China |
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Abstract To solve the problem of target localization in bistatic MIMO radar, a new method based on third-order tensor decomposition is proposed for fast multi-target localization. First, the matched filter output is transformed to a third-order tensor and its dimension is reduced. Then, the transmit and receive steering matrices and Doppler matrix are estimated through Alternate Least Square (ALS) method. Finally, the target Direction Of Departure (DOD), Direction Of Arrival (DOA) and Doppler frequency can be regressed by spectrum estimation algorithms. The Line Search (LS) scheme is used to speed up the convergence of ALS. Compared with the existing approaches, the proposed method avoids two-Dimensional (2-D) spectrum peak searching and covariance matrix estimating, and the target DOD, DOA and Doppler frequency are automatically paired. The estimation performance is improved; meanwhile, the computational cost and storage are effectively reduced. The effectiveness and superiority of the proposed method is demonstrated by simulation results.
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Received: 07 June 2011
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Corresponding Authors:
Cheng Yuan-bing
E-mail: chengyb@yeah.net
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