水声信道并行软判决盲均衡算法

A FSE-SEI-SDD Algorithm Better for Underwater Acoustic Communication

在水声通信系统中,为了抑制由多径效应产生的严重码间干扰,必须进行信道均衡。文章在超指数迭代算法(SEI)的基础上,引入软判决思想,提出了一种基于SEI算法的分数间隔并行软判决肓均衡算法(FSE-SEI-SDD)。计算机仿真结果表明,该算法相对于传统的常数模算法(CMA)和SEI算法,获得了较快的收敛速度和较小的剩余码间干扰,提高了通信系统的质量,具有一定的实用价值。

Aim.The SEI(super-exponential iteration) algorithm of Ref.4 is better than the classical CMA (constant modulus algorithm) in that the convergence speed is higher.Benefiting from some ideas of Ref. 5,including the SDD(soft-decision directed) idea,and utilizing the well known FSE(fractionally-spaced equalizer),we propose a FSE-SEI-SDD algorithm that is,we believe,better than CMA algorithm in that the convergence speed is higher and that the ISI(inter-symbol interference) is less.Section 1 of the full paper br...