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.
出处
《电视技术》
北大核心
2012年第3期121-124,共4页
Video Engineering
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
low-density parity check code
mutual information model
rate compatible
incremental redundancy
