Reliability-based subpacket transmission for hybrid ARQ with LDPC codes

An irregular LDPC coded sub-packet hybrid ARQ (HARQ) scheme based on instantaneous reliability is presented for selection and retransmission. Reliability-based (RB) HARQ was initially proposed for Turbo coded case with iterative decoding, whereas for irregular LDPC coded scenario, a degree distribut...

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Bibliographic Details
Main Authors: Jia Minli, He Zunwen, Kuang Jingming, Fei Zesong
Format: Conference Proceeding
Language:English
Subjects:
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Reliability
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Summary:An irregular LDPC coded sub-packet hybrid ARQ (HARQ) scheme based on instantaneous reliability is presented for selection and retransmission. Reliability-based (RB) HARQ was initially proposed for Turbo coded case with iterative decoding, whereas for irregular LDPC coded scenario, a degree distribution based (DDB) retransmission strategy was presented that the nodes with large degree have higher retransmission priority in [10]. In this paper, we focus on the improved approach to segment and select sub-packets according to instantaneous reliability for potential throughput performance enhancement. Numeral results with link level simulation demonstrate that a significant throughput gain is realized by setting suitable length of sub-packets for reliability based retransmission than DDB scheme.
DOI:10.1109/ICCCAS.2007.6247578