An Improved Degree Distribution Based HARQ for LDPC
An improved hybrid ARQ (HARQ) scheme for irregular LDPC codes based on degree distributions is introduced in this paper. In traditional Degree Distribution Based HARQ (DDB-HARQ), the source selectively retransmits the nodes with large degrees and this scheme brings a significant gain to the irregular LDPC coded system. However, the selecting method of the traditional scheme is thought to be not accurate enough. In this paper, an improved method in which the source retransmits the nodes in different degrees at specific proportions each time has been proposed. According to the analysis with Gaussian Approximation (GA) the improved scheme could be more efficient since the retransmission proportions are more accurate which has also been proved by the simulation results.
LDPC HARQ degree distribution Gaussian Approximation
Xuehua Li Yiqing Cao Dacheng Yang
Wireless Research Center Beijing University of Posts & Telecommunications Beijing,P.R.China;Informat Wireless Research Center Beijing University of Posts & Telecommunications Beijing,P.R.China
国际会议
武汉
英文
2006-09-01（万方平台首次上网日期，不代表论文的发表时间）