| 一种应用于实时语音传输的LDPC码的设计 |
| |
| 引用本文： | 董自健,毕训银.一种应用于实时语音传输的LDPC码的设计[J].通信技术,2008,41(7). |
| |
| 作者姓名： | 董自健 毕训银 |
| |
| 作者单位： | 1. 淮海工学院电子工程系,江苏连云港,222005;南京邮电大学通信与信息学院,江苏南京,210003
2. 淮海工学院电子工程系,江苏连云港,222005 |
| |
| 摘 要： | 文中设计了一种适于对声码器的输出码流进行前向纠错编码的低密度奇偶校验码(LDPC码).该低密度奇偶校验码具有半规则化的结构,编码简单,存储量少,调整码率方便,易于硬件实现.文中同时对汉明码,卷积码、Turbo码、低密度奇偶校验码分别在AWGN、Rayleigh信道下的传输性能进行了仿真比较.仿真结果表明,长度适合的LDPC码误码性能远超过汉明码、卷积码,综合性能与Turbo码接近.
|
| 关 键 词： | 语音传输 LDPC码 信道编码 应用 实时语音传输 LDPC 设计 Transmission Voice Code 误码性能 综合 长度 仿真结果 比较 传输性能 信道 Rayleigh AWGN 码分 低密度奇偶校验 Turbo 卷积码 |
Design of LDPC Code for Real-Time Voice Transmission |
| |
| DONG Zi-jian,BI Xun-yin.Design of LDPC Code for Real-Time Voice Transmission[J].Communications Technology,2008,41(7). |
| |
| Authors: | DONG Zi-jian BI Xun-yin |
| |
| Affiliation: | DONG Zi-jian ,BI Xun-yin (Department of Electronic Engineering,Huaihai Institute of Technology,Lianyungang Jiangsu 222005,China,Department of Communication Engineering,Nanjing University of Posts , Telecommunications,Nanjing Jiangsu 210003,China) |
| |
| Abstract: | In this paper, a new encoding structure of LDPC codes used in the output bitstream of vocoder is proposed. Those codes offer many advantages, such as simple encoding structure, less memory requirement, easy circuit implementation, easy adjustment of code rate and code length. The performances of Hamming codes, convolutional codes, Turbo codes and LDPC codes in AWGN and Rayleigh channel are simulated and compared respectively. Simulation results indicate that these LDPC codes perform as well as Turbo codes, ... |
| |
| Keywords: | voice transmission LDPCC (low-density parity check code) channel encoding |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
