一种高效的RC-LDPC编码IR-HARQ方案  

High Spectrual Efficiency RC-LDPC Coded IR-HARQ Scheme

作　　者：陈翔[1] 姜晖[1] 

机构地区：[1]合肥电子工程学院,安徽合肥230037

出　　处：《电视技术》2012年第3期121-124,共4页Video Engineering

摘　　要：针对RC-LDPC码编码的自适应增余型重传(IR-HARQ)系统,构造了码率范围从0.1到0.9,码率间隔为0.1的速率匹配低密度奇偶校验(RC-LDPC)码族,并基于多载波链路预测的互信息(MI)模型,准确预测了系统最少应重传的校验码元数,可以根据每次传输的信道状况采用不同的调制方式,能在很宽的信噪比范围内提高系统信息传输的有效性。To improve the speetrual efficiency of incremental redundancy scheme, a rate compatible LDPC code family is proposed, of which the coding rate ranged from 0. 1 to 0. 9, and the granularity is 0. 1. Based on the mutual information model, which is an accurate multi-carrier link error prediction method, the minimum retransmission symbols to satisfy the reliability requirement is predicted accurately, furthermore different modulation modes are allowed. The spectrual efficiency is improved significantly in a wide range of signal-to-noise ratio.

关 键 词：低密度奇偶校验码 互信息模型 速率匹配 自适应增余型重传 

分 类 号：TN911.22[电子电信—通信与信息系统]