Title :
Decision Feedback Blind Equalization Algorithm Based on Momentum and Orthogonal Wavelet Packet Transform
Author :
Jie Zhu ; Yecai Guo ; Chao Yang
Author_Institution :
Dept. of the Phys. & Electr. Inf., Huainan Normal Univ., Huainan, China
Abstract :
Towards the nonlinear underwater acoustic channels with the severe linear distortion, based on the fast de-correlation characteristic of wavelet packet transform, a decision feedback blind equalization algorithm based on momentum and orthogonal wavelet packet transform (MWPT-DFE) is proposed, which is derived by revising the iteration equation of forward weight vector for decision feedback structure blind equalizer. Comparing with normal decision feedback blind equalization algorithm (DFE) and the decision feedback blind equalization algorithm based on orthogonal wavelet Packet transform (WPT-DFE), the new algorithm has fast convergence, good performance for tracking and smaller MSE. The efficiency of the proposed algorithm is proved by computer simulation in underwater acoustic channels.
Keywords :
blind equalisers; decision feedback equalisers; iterative methods; mean square error methods; telecommunication channels; underwater acoustic communication; wavelet transforms; MSE; de-correlation characteristics; decision feedback blind equalization algorithm; iteration equation; linear distortion; mean square error methods; momentum packet transform; nonlinear underwater acoustic channels; orthogonal wavelet packet transform; underwater acoustic digital communication; Acoustic distortion; Blind equalizers; Convergence; Decision feedback equalizers; Nonlinear distortion; Nonlinear equations; Underwater acoustics; Vectors; Wavelet packets; Wavelet transforms;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5302158
