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| Channel Blind Equalization Algorithm for Multi-channel SAR/GMTI System |
| Tian Bin① Zhu Dai-yin① Zhu Zhao-da① Si Hai-bo② |
①(College of Electronics and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China)
②(Troop 93942 of PLA, Xianyang 712000, China) |
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Abstract Channel blind equalization algorithm based on Eigen-Decomposition (ED) of data covariance matrix can be applied to calibrate the channel mismatch for multi-channel SAR/GMTI system. However, this algorithm has a disadvantage that it suffers from a slow convergence rate. In this paper, the principle of channel blind equalization algorithm is firstly investigated. Then, to improve its convergence rate, reduced-dimension technique is used into this algorithm and a new channel blind equalization algorithm is proposed. Experimental results on simulation data and measured SAR data demonstrate that compared with the conventional channel blind equalization algorithm, the proposed algorithm shows a fast convergence rate and is able to calibrate channel mismatch with much less sample support.
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Received: 14 July 2011
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Corresponding Authors:
Tian Bin
E-mail: Tianbin218@163.com
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2012, Vol. 34 
