NDLI: A new parity structure with multi-weight circulants for QC LDPC codes

Content Provider	IEEE Xplore Digital Library
Author	Hosung Park Seokbeom Hong Jong-Seon No Dong-Joon Shin
Copyright Year	2012
Description	Author affiliation: Department of Electronic Engineering, Hanyang University, Seoul 133-791, Korea (Dong-Joon Shin) \|\| Department of Electrical Engineering and Computer Science, INMC, Seoul National University, Seoul 151-744, Korea (Hosung Park; Seokbeom Hong; Jong-Seon No)
Abstract	The block dual-diagonal (BDD) parity structure is widely adopted in many practical irregular quasi-cyclic (QC) low-density parity-check (LDPC) codes. These QC LDPC codes have good error-correcting performance in waterfall region but usually show relatively high error floors in low error rate region. In this paper, by using multi-weight circulants, a new BDD structure is proposed for the parity part of irregular QC LDPC codes to lower error floors and support efficient encoding. Since the parity part of parity-check matrices has flexible degree distribution with the aid of multi-weight circulants, QC LDPC codes with the proposed BDD structure can have large minimum Hamming distance compared to those with the conventional BDD structure, especially, in the low-rate case. Simulation results show that QC LDPC codes with the proposed BDD structure have lower error floor than those with the conventional BDD structure.
Starting Page	3093
Ending Page	3097
File Size	139736
Page Count	5
File Format	PDF
ISBN	9781467325806
ISSN	21578117
e-ISBN	9781467325790
e-ISBN	9781467325783
DOI	10.1109/ISIT.2012.6284131
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-07-01
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Parity check codes Data structures Boolean functions Encoding Hamming distance Bit error rate Indexes
Content Type	Text
Resource Type	Article

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