基于LDPC编码的自适应数据重传方法  

LDPC-based adaptive hybrid automatic retransmission request method

作　　者：吴湛击[1] 傅婷婷[1] 欧阳子月[1] 王文博[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《系统工程与电子技术》2010年第9期1793-1798,共6页Systems Engineering and Electronics

基　　金：国家重大科技专项(2009ZX03003-011-3);国家自然科学基金(60702050);教育部科学技术研究重点项目(109013)资助课题

摘　　要：提出一种新的基于低密度校验(low density parity check,LDPC)码的自适应数据重传方法。在信道条件差(信噪比低)时,该方法采用母码为低码率的LDPC码编码,校验位打孔的重传方式;在信道条件好(信噪比高)时,采用母码为高码率的LDPC码编码,信息位打孔的重传方式。该方法既能提高硬件利用率、节约能耗,又能保证在最差信道下数据传输的可靠性。A novel low density parity check（LDPC） based adaptive hybrid automatic retransmission request（HARQ） method is proposed.A few mother LDPC codes with different code rates can be used for the automatic modulation coding-HARQ procession.When the channel is bad,e.g.,the SNR is low,the low-code-rate mother LDPC code is chosen,and the parity-puncturing HARQ should be used for the retransmission.When the channel is good,e.g.,the SNR is high,the high-code-rate mother LDPC is selected,and the data-puncturing HARQ should be utilized.This method can improve the efficiency of hardware implementation,save energy consumption,and ensure a good performance even when the channel is very bad.

关 键 词：低密度校验码 混合自动重传 信息位打孔 校验位打孔 

分 类 号：TN911.22[电子电信—通信与信息系统]