LDPC编码AMC-OFDM系统中的两种MCS选择准则  

Two MCS Selection Rules in LDPC Coded AMC-OFDM System

作　　者：周明宇[1] 李立华[1] 路维佳[1] 陶小峰[1] 张平[1] 

机构地区：[1]泛网无线通信教育部重点实验室(北京邮电大学)北京邮电大学无线新技术研究所,北京100876

出　　处：《电子与信息学报》2008年第7期1635-1639,共5页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(60496312);2005~2006华为科技基金;北京邮电大学研究生创新项目资助课题

摘　　要：该文提出低密度奇偶校验(LDPC)码的自适应调制编码正交频分复用(AMC-OFDM)系统,并详述了该系统的原理。针对传统AMC系统中调制编码方案(MCS)的选择准则对性能提升有限的问题,提出可用于该AMC系统的两种MCS选择准则,根据接收到的所有单元信号的后验SNR确定相应自适应块采用的MCS。文章分析了这两种准则的吞吐量性能。仿真结果表明,把这两种准则应用于LDPC编码的AMC-OFDM系统中,能够带来比传统选择方法更高的吞吐量。A Low Density Parity Check （LDPC） coded Adaptive Modulation and Coding-Orthogonal Frequency Division Multiplexing （AMC-OFDM） system is proposed, and its theory is given in detail, In order to solve the problem that the traditional Modulation and Coding Scheme （MCS） selecting rule improves the performance limitedly, two MCS selecting rules are proposed for the AMC system, in which MCS for an adaptive block is determined by the posteriori Signal-to-Noise-Ratio （SNR） of units in the block. Throughput performance is analyzed for the two rules. Simulation results show that they can bring to much higher throughput than the traditional method when applied in LDPC coded AMC-OFDM system,

关 键 词：低密度奇偶校验码 自适应调制编码 正交频分复用 调制编码方案 后验信噪比 

分 类 号：TN911.22[电子电信—通信与信息系统]