Title :
Novel reliability-based HARQ scheme for irregular LDPC codes
Author :
Xu, Chengxin ; Chang, Yongyu ; Zhang, Xin ; Yang, Dacheng
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing, China
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.
Keywords :
automatic repeat request; error correction codes; parity check codes; reliability; feedback; irregular LDPC codes; irregular low-density parity-check; reliability-based HARQ scheme; reliability-based hybrid automatic repeat request; retransmission; unequal error protection; AWGN; Additive white noise; Automatic repeat request; Decoding; Error correction codes; Feedback; Parity check codes; System performance; Throughput; Turbo codes; Irregular LDPC codes; reliability-based HARQ; unequal error protection;
Conference_Titel :
Information, Computing and Telecommunication, 2009. YC-ICT '09. IEEE Youth Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-5074-9
Electronic_ISBN :
978-1-4244-5076-3
DOI :
10.1109/YCICT.2009.5382355
