Novel reliability-based HARQ scheme for irregular LDPC codes

2009 IEEE Youth Conference on Information, Computing and Telecommunication Pub Date : 2009-09-01 DOI:10.1109/YCICT.2009.5382355

Chengxin Xu, Yongyu Chang, Xin Zhang, Dacheng Yang

引用次数: 2

Abstract

In this paper, we propose a new and practical reliability-based hybrid automatic repeat request (RB-HARQ) scheme for irregular low-density parity-check (LDPC) codes. Irregular LDPC codes have an unequal error protection (UEP) property. Using this property, we find that the middle degree message nodes of irregular LDPC codes are important for HARQ systems. If we pick out the low reliable message nodes of them for retransmission, we will reduce the feedback. Moreover, the system performance of this scheme is as well as that of the original RB-HARQ scheme.

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一种基于可靠性的不规则LDPC码HARQ方案

针对不规则低密度奇偶校验(LDPC)码，提出了一种新的实用的基于可靠性的混合自动重复请求(RB-HARQ)方案。不规则LDPC码具有不等错误保护(UEP)特性。利用这一性质，我们发现不规则LDPC码的中间度消息节点对于HARQ系统非常重要。如果我们挑选出其中可靠性较低的消息节点进行重传，就可以减少反馈。此外，该方案的系统性能与原RB-HARQ方案相当。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2009 IEEE Youth Conference on Information, Computing and Telecommunication

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