Page 138 - 《应用声学》2020年第6期

第 39 卷 第 6 期 Vol. 39, No. 6
2020 年 11 月 Journal of Applied Acoustics November, 2020

⋄ 研究报告 ⋄

语声通信降噪研究

田玉静 1† 左红伟 2 王 超 3

(1 青岛理工大学信息与控制工程学院 青岛 266033)
(2 青岛理工大学土木工程学院 青岛 266033)
(3 中兴通讯 GSM 网规网优部 西安 710065)

摘要：语声通信系统中，语声通过信道传输将不可避免地引入码间串扰和信号畸变，同时受到噪声污染。该文
在分析自适应常数模盲均衡算法和改进盲均衡算法的基础上，考虑到自适应盲均衡技术在语声噪声控制方面
能力有限，将自适应盲均衡技术与小波包掩蔽阈值降噪算法联合使用，形成一种基带语声增强新方法。仿真试
验结果显示自适应盲均衡技术可以使星座图变得清晰而紧凑，有效减小误码率。研究证实该方法在语声信号
码间串扰和畸变严重情况下，在白噪声及有色噪声的不同噪声环境中都具有稳定的降噪能力，消噪同时可获
得汉语普通话良好的听觉效果。
关键词：盲均衡；自适应算法；通信系统；语声增强
中图法分类号: TN713.7 文献标识码: A 文章编号: 1000-310X(2020)06-0932-08
DOI: 10.11684/j.issn.1000-310X.2020.06.017

A research on voice communication de-noising

TIAN Yujing 1 ZUO Hongwei 2 WANG Chao 3

(1 School of Information and Control Engineering, Qingdao Technological University, Qingdao 266033, China)
(2 School of Civil Engineering, Qingdao Technological University, Qingdao 266033, China)
(3 ZTE Communications GSM Radio Network Planning & Optimization Department, Xi’an 710065, China)

Abstract: In the voice communication system, the voice signal is transmitted through the channel, which
introduces the inter-symbol interference (ISI) and signal distortion. At the same time, it is polluted by noise.
Based on the analysis of adaptive blind equalization algorithm CMA (constant modulus algorithm) and im-
proved blind equalization algorithm, and considering the limited ability of adaptive blind equalization in speech
noise control, in this paper, a new base-band voice enhancement method is developed by combining adaptive
blind equalization with wavelet packet masking threshold noise reduction algorithm. The simulation shows that
the adaptive blind equalization technology can make the constellation map clear and compact, and reduce the
error rate effectively. The research verifies that the method has stable noise reduction ability in different noise
environments, such as white noise and colored noise, under the condition of ISI of speech signal and serious
distortion. At the same time, it can get good auditory effect in Mandarin Chinese.
Keywords: Blind equalization; Adaptive algorithm; Communication system; Voice enhancement

2020-03-23 收稿; 2020-06-28 定稿
作者简介: 田玉静 (1975– ), 女, 山东潍坊人, 硕士, 高级实验师, 研究方向: 语声信号处理, 计算机系统仿真。
† 通信作者 E-mail: 2260006540@qq.com