Volume 8 Number 8 (Aug. 2013)
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JCP 2013 Vol.8(8): 1995-2002 ISSN: 1796-203X
doi: 10.4304/jcp.8.8.1995-2002

Design of A High-speed Parallel LDPC Encoder

Guoqiang Wu1, 2, Shujun Tan2, and Jianwei Zhang3
1 State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China
2 School of Aeronautics and Astronautics, Dalian University of Technology, Dalian 116024, China
3 School of Electronic Science and Technology, Dalian University of Technology, Dalian 116024, China


Abstract—In this paper, the traditional BP decoding algorithm of LDPC code is investigated in detail. The large computation load is a shortcoming of traditional BP decoding algorithm, and an improved BP decoding algorithm is then proposed to deal with the problem. In the iterative decoding process, the wrong bit information only needs to be updated for the decoding algorithm, which consequently improves the efficiency and reduces time-delay of decoding. According to the improved BP decoding algorithm, the high-speed parallel encoder is designed, which can be used in various distributed sensor network applications. Furthermore, the error correction performance of this high speed parallel encoder in the Gaussian channel is studied. The simulation is provided to illustrate that the improved high speed parallel encoder has lower computational complexity and higher decoding speed based on the premise of a little decoding performance loss.

Index Terms—LDPC Code, BP decoding arithmetic, AWGN channel, high-speed Parallel decoder, iterative decoding algorithms

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Cite: Guoqiang Wu, Shujun Tan, and Jianwei Zhang, " Design of A High-speed Parallel LDPC Encoder," Journal of Computers vol. 8, no. 8, pp. 1995-2002, 2013.

General Information

ISSN: 1796-203X
Abbreviated Title: J.Comput.
Frequency: Bimonthly
Editor-in-Chief: Prof. Liansheng Tan
Executive Editor: Ms. Nina Lee
Abstracting/ Indexing: DBLP, EBSCO,  ProQuest, INSPEC, ULRICH's Periodicals Directory, WorldCat,etc
E-mail: jcp@iap.org
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