NDLI: An Improved Construction of LDPC Codes Based on Data Punctured Hybrid ARQ

Content Provider	IEEE Xplore Digital Library
Author	Ming Jiang Chunming Zhao Zhanli Liu Li Zhang
Copyright Year	2006
Description	Author affiliation: Nat. Mobile Commun. Res. Lab., Southeast Univ., Nanjing (Ming Jiang; Chunming Zhao; Zhanli Liu; Li Zhang)
Abstract	A data puncturing type-II hybrid automatic retransmission request protocol, using LDPC codes which have the constructions with low encoding complexity and moderate matrix dimensions, is a good tradeoff between the system throughput and the hardware overhead. Based on the characteristics of this protocol that only the parity bits are sent in each retransmission and the puncturing is operated on the information bits, we introduce an improved matrix construction which increases the reliability of parity bits and the decoding performance without any further additional encoding/decoding complexity. There are two iterative decoding steps in the receiver for each retransmission, so we optimize the noise thresholds of both iterative decoding steps and find a more desirable irregular distribution by the density evolution. Simulation results of the data throughput show that the codes with the improved construction and distribution obviously outperform the original codes
Sponsorship	IEEE Circuits and Syst. Soc. HKUST UESTC City Univ. of Hong Kong
Starting Page	702
Ending Page	706
File Size	5857286
Page Count	5
File Format	PDF
ISBN	0780395840
DOI	10.1109/ICCCAS.2006.284752
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2006-06-25
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Protocols Transmitters Throughput Mobile communication Numerical simulation Parity check codes Hardware Concatenated codes Automatic repeat request Iterative decoding
Content Type	Text
Resource Type	Article

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