Orthogonal multi-wavelet transform constant modulus decision feedback blind equalizer
Yecai Guo · Computer Engineering and Applications Journal · 2011
Aiming at the slow convergence rate of Constant Modulus Algorithm Decision Feedback blind Equalizer(CMA-DFE),a New balance orthogonal Multi-Wavelet Transform based on Constant Modulus Algorithm Decision Feedback blind Equalizer(New-MWT-CMA-DFE) is proposed on the basis of analyzing on common balance orthogonal Multi-Wavelet Transform based on Constant Modulus Algorithm Decision Feedback blind Equalize(rMWT-CMA-DFE).In the proposed equalizer,the balance orthogonal multi-wavelet transform is introduced into CMA-DFE and the convergence rate of the proposed equalizer is improved by normalizing orthogonal multi-wavelet transform for the output signal of the decision device.Simulation tests have indicated:for the frequency response smooth channel,the NEW-MWT-CM A-DFE has not only the faster convergence rates but also smaller residua error compared with those of CMA-DFE and MWT-CMA-DFE;for the frequency response waved channel,the performance of the NEW-MWT-CMA-DFE is consistent with the MWT-CMA-DFE and is superior to the CMA-DFE in convergence rates and residua error.