关键词: 盲均衡, 水声信道, 均方轮廓算法, 多小波变换

Abstract: In order to overcome shortcoming of slow convergence and without phase error correction capability of the traditional Constant Modulus Algorithm （CMA）, Multi-Wavelets Transform based Square Contour Algorithm（MWTSCA） is proposed. In the proposed algorithm, on the one hand it uses square contour algorithm to correct promptly phase ambiguity and to the non-constant modulus high-order QAM it has good performance, on the other hand, it uses the de-correlation ability of balanced orthogonal multi-wavelet transform to further improve the performance of the algorithm. Theoretical analysis and underwater acoustic channel simulation results show that the proposed algorithm has a faster convergence rate and smaller steady-state error.

Key words: blind equalization, underwater acoustic channels, square contour algorithm, multiwavelets transform