Results 161 to 170 of about 595,487 (209)

Constructions of QC LDPC codes based on integer sequences

Science China Information Sciences, 2014
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Lijun Zhang, Bing Li, Lee Lung Cheng
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Low power decoder design for QC-LDPC codes

Proceedings of 2010 IEEE International Symposium on Circuits and Systems, 2010
This paper presents a low-power decoder design approach for generic quasi-cyclic low-density parity-check (QC-LDPC) codes based on the layered min-sum decoding algorithm. To reduce the energy consumption, a novel message length-shortening scheme is explored.
Kai He, Jin Sha 0001, Li Li 0003, Zhongfeng Wang 0001   +3 more
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Combinatorial optimization for improving QC LDPC codes performance

2013 IEEE International Symposium on Information Theory, 2013
Techniques for searching for good quasi-cyclic (QC) LDPC block codes of short and moderate lengths which are suitable for practical purposes are studied. To facilitate implementations only codes whose parity-check matrices having bidiagonal structure of their submatrices and consequently having low encoding complexity are considered.
Irina E. Bocharova, Boris D. Kudryashov, Rolf Johannesson   +2 more
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Efficient Decoding of QC-LDPC Codes Using GPUs

2011
In this work, we propose an efficient quasi-cyclic LDPC (QCLDPC) decoder simulatorwhich runs on graphics processing units(GPUs). We optimize the data structures of the messages used in the decoding process such that both the read and write processes can be performed in a highly parallel manner by the GPUs.
Yue Zhao 0011, Xu Chen 0018, Chiu-Wing Sham, Wai Man Tam, Francis Chung-Ming Lau   +4 more
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Efficient encoding of QC-LDPC codes related to cyclic MDS codes

IEEE Journal on Selected Areas in Communications, 2008
In this paper, we present an efficient systematic encoding algorithm for quasi-cyclic (QC) low-density parity check (LDPC) codes that are related to cyclic maximum-distance separable (MDS) codes. The algorithm offers linear time complexity, and it can be easily implemented by using polynomial multiplication and division circuits.
Norifumi Kamiya, Eisaku Sasaki
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Efficient Decoder Implementation for QC-LDPC Codes

2006 International Conference on Communications, Circuits and Systems, 2006
Channel coding is an important building block in communication systems. Low-density parity-check codes is one kind of prominent error correcting codes being considered in next generation industry standards. This paper presents a memory efficient, very high speed decoder architecture suited for quasi-cyclic low-density parity-check codes using modified ...
Jin Sha, Minglun Gao, Zhongjin Zhang, Li li, Zhongfeng Wang   +4 more
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QC-LDPC Code-Based Cryptosystems

2014
In this chapter, the use of QC-LDPC codes in public key cryptosystems inspired to the McEliece and Niederreiter systems is studied. Both the case in which the private and the public code are permutation equivalent and that in which such an equivalence is absent are considered.
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Construction of high-rate QC-LDPC codes

The 2011 International Conference on Advanced Technologies for Communications (ATC 2011), 2011
In this paper, we construct high-rate quasi-cyclic low-density parity-check (QC-LDPC) codes with girth-10 based on shortened array codes. First, we derive analytic results on the maximum number of columns for shortened array codes of different girths. A code construction method inspired by the analysis is proposed for column-weight-three codes and is ...
null Xu Chen, Francis C.M. Lau
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An Efficient Layered Decoding Architecture for Nonbinary QC-LDPC Codes

IEEE Transactions on Circuits and Systems I: Regular Papers, 2012
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Yeong-Luh Ueng, Chen-Yap Leong, Chung-Jay Yang, Chung-Chao Cheng, Kuo-Hsuan Liao, Shu-Wei Chen   +5 more
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Construction of QC-LDPC Codes on Combinatorial Sequences

2013 5th International Conference on Intelligent Human-Machine Systems and Cybernetics, 2013
Based on the properties of pell sequences, hanoi sequences and lucas sequences, three methods are proposed to construct new families of quasi cyclic low density parity check codes. Furthermore, we will prove that the designed QC-LDPC codes have no circles shorter than six. The performance of the codes is also investigated.
Fu Chenghua, Li Xiuli
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