《电讯技术》，不收费还发稿酬的权威期刊、核心期刊！

首页 期刊视频编委会征稿启事出版道德声明审稿流程读者订阅论文查重联系我们English

引用本文：

肖旻.利用EXIT图分析信源码率对双LDPC码系统的影响[J].电讯技术，2014，54（12）： - . [点击复制]
XIAO Min.Using EXIT chart to analyze impact of source code rate on double LDPC code systems[J].，2014，54（12）： - . [点击复制]

本文已被：浏览 3511次下载 47次	码上扫一扫！
利用EXIT图分析信源码率对双LDPC码系统的影响
肖旻
0 字体:加大+\|默认\|缩小-
(厦门理工学院通信工程系，福建厦门 361024)

摘要:

双LDPC（DLDPC）码系统是一种高性能的信源信道联合编码系统，但是其性能在很大程度上受到信源码率的影响。为了从理论上分析信源码率对DLDPC码系统的影响，推导了外信息转移（EXIT）函数，并利用EXIT图分析了信源码率对DLDPC码系统的影响，理论分析结果与实际仿真结果一致。进而利用EXIT图估算出DLDPC码系统在不同信源熵情况下的信源码率门限值，该门限值可以用来指导实际系统中信源码率的选取。所提出的分析方法比传统的蒙特卡罗仿真法更加简捷、直观。

关键词: 双LDPC码系统信源信道联合编码信源码率 EXIT图

DOI：

基金项目:国家自然科学基金资助项目（61202013）

Using EXIT chart to analyze impact of source code rate on double LDPC code systems

XIAO Min

()

Abstract:

Double low-density parity-check(DLDPC) code system is a class of joint source and channel coding system with good performance.However,the performance of DLDPC code system is significantly influenced by the source code rates.In order to analyze the impacts of source code rates on DLDPC code system theoretically,extrinsic information transfer(EXIT) functions are derived and the performance of DLDPC code system with different source code rates is analyzed based on EXIT charts.The theoretical analysis is in good agreement with simulation result.Furthermore,the thresholds of source code rates in DLDPC code system are estimated by EXIT charts.The thresholds can be used to optimize the source code rates of real DLDPC code system.The proposed analysis method is easier and more straightforward than the traditional Monte Carlo simulation method.

Key words: double LDPC code system joint source and channel coding source code rate EXIT chart