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Orthogonal Wavelet Transform based Sign Decision Dual-mode blind equalization Algorithm

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3 Author(s)
Ye-cai Guo ; Nanjing University of Information Science &Technology, 210044, China ; Ying-ge Han ; Chao Yang

Aiming at the slow convergence rate and the high mean square error of constant modulus algorithm(CMA), a new orthogonal wavelet transform based sign decision dual-mode blind equalization algorithm(WT-SDDA) is proposed. In the proposed algorithm, orthogonal wavelet transform based constant modulus algorithm (WT-CMA) is integrated with orthogonal wavelet transform based stop-and-go changeable modulus blind equalization algorithm (WT-SG-CMA), and the switch process is decided by the sign decision. Simulation tests with underwater acoustic channel shows that the proposed WT-SDDA algorithm outperforms the CMA and the WT-CMA in the convergence rates and residual mean square error and that it has the faster convergence rate than the WT-SG-CMA under condition of the same residual error.

Published in:

2008 9th International Conference on Signal Processing

Date of Conference:

26-29 Oct. 2008