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GSM语音信道下数字信号传输算法研究

发表时间:2014-04-30  浏览量:1614  下载量:713
全部作者: 唐旭,李文娟,王勇
作者单位: 西安电子科技大学通信工程学院
摘 要: 通过在发送端对数字信号进行信道编码、正交频分复用(orthogonal frequency division multiplexing,OFDM)调制和插值处理,使得数字信号近似具有类语音信号特征,从而能够在全球移动通信系统(global system for mobile,GSM)语音信道中准确传输,并使用Matlab结合规则脉冲激励长期预测(regular pulse excitation-long term prediction,RPE-LTP)声码器搭建仿真系统进行仿真。结果表明:处理后的信号能够以近似类语音信号的形式通过GSM语音信道,接收端恢复后的信号误码较小,从而为数字信号在GSM语音信道中的传输提供一种可行算法。
关 键 词: 数字信号处理;全球移动通信系统语音信道;正交频分复用调制;快速傅里叶变换插值
Title: Research on algorithm of digital signal transmission in GSM voice channel
Author: TANG Xu, LI Wenjuan, WANG Yong
Organization: School of Telecommunications Engineering, Xidian University
Abstract: In this paper, digital signal is almost equipped with features of liking voice signal by being channel coded, orthogonal frequency division multiplexing (OFDM) modulated and interpolated in the sending end, thereby, it can be transferred accurately in the global system for mobile (GSM) voice channel, and Matlab software combined with regular pulse excitation-long term prediction (RPE-LTP) vocoder is applied to construct simulation system. The results of simulation show that the processed signal can pass through the GSM voice channel in the shape of liking speech signal, and the error bit of signal is less after being regained in the receiving end, which offers a feasible algorithm for digital transmission based on the GSM voice channel.
Key words: digital signal processing; global system for mobile voice channel; orthogonal frequency division multiplexing modulation; fast Fourier transform interpolation
发表期数: 2014年4月第8期
引用格式: 唐旭,李文娟,王勇. GSM语音信道下数字信号传输算法研究[J]. 中国科技论文在线精品论文,2014,7(8):791-798.
 
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