A Fast Decision Feedback Blind Equalization Algorithm Suitable for Underwater Acoustic Channel
Zhao Jun-wei · Audio Engineering · 2005
Based on analysis of Constant Modulus Decision Feedback Equalization (CMDFE),a fast decision feedback blind equalization algorithm is presented in this paper . A different error function from CMA is constructed for faster convergence,which alone may be able to remove inter-symbol interference(ISI) and correct the phase error and simultaneously improve the performance of convergence further. Different nonlinear transformations are implemented on the real and imaginary parts of the output signals respectively in the proposed algorithm. Simulation tests are conducted by using underwater acoustic channel for numerical analysis and research of these algorithms. The result proves that the proposed algorithm may not only equalize the multipath underwater acoustic channel effectively,but also outperform the CMDFE in terms of convergence speed.