电讯技术Issue(12)：1607-1611,5.DOI:10.3969/j.issn.1001-893x.2014.12.003
利用EXIT图分析信源码率对双LDPC码系统的影响
Using EXIT Chart to Analyze Impact of Source Code Rate on Double LDPC Code Systems
摘要
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 in-fluenced by the source code rates. In order to analyze the impacts of source code rates on DLDPC code sys-tem theoretically,extrinsic information transfer( EXIT) functions are derived and the performance of DLD-PC 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 tradi-tional Monte Carlo simulation method.关键词
双LDPC码系统/信源信道联合编码/信源码率/EXIT图Key words
double LDPC code system/joint source and channel coding/source code rate/EXIT chart分类
信息技术与安全科学引用本文复制引用
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,(12):1607-1611,5.基金项目
国家自然科学基金资助项目(61202013)@@@@Foundation Item:The National Natural Science Foundation of China(No.61202013) （61202013）
