Title :
Degree distribution based HARQ for irregular LDPC
Author :
Cao, Y. ; Gu, J. ; Qi, L. ; Yang, D.
Author_Institution :
Sch. of Telecommun. Eng., Beijing Univ. of Posts & Telecommun., China
fDate :
3/16/2006 12:00:00 AM
Abstract :
A new hybrid ARQ (HARQ) scheme is introduced for irregular low-density parity-check (LDPC) codes. It is based on degree distributions and so is called degree distribution based HARQ (DDB-HARQ). In DDB-HARQ, the receiver selectively retransmits a certain percentage of the nodes with large degrees each time. According to the simulation results, DDB-HARQ brings a significant gain to the LDPC coded system, since the nodes with large degrees in a frame contribute more to the performance.
Keywords :
automatic repeat request; parity check codes; DDB-HARQ; degree distribution based HARQ; hybrid ARQ scheme; irregular LDPC codes; nodes retransmission;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20063676
