一种高效的RC-LDPC编码IR-HARQ方案

摘要

To improve the spectrual 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.%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.