Results 141 to 150 of about 250 (178)

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
openaire   +1 more source

Construction of high-girth QC-LDPC codes

2008 5th International Symposium on Turbo Codes and Related Topics, 2008
We describe a hill-climbing algorithm that constructs high-girth quasi-cyclic low-density parity check (QC-LDPC) codes. Given a desired girth, the algorithm can find QC-LDPC codes of shorter block-length in much less time compared with the previously proposed ldquoguess-and-testrdquo algorithm.
null Yige Wang, J.S. Yedidia, S.C. Draper   +2 more
openaire   +1 more source

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.
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Joint Design of QC‐LDPC Codes for Coded Relay Cooperation

Chinese Journal of Electronics, 2016
This paper proposes an effective method to jointly design girth-4 cycle-free Quasi-cyclic (QC) Low-density parity-check (LDPC) codes for multi-relay cooperation in a Rayleigh fading channel, where the joint iterative decoding by Min-sum algorithm (MSA) based on the introduced joint Tanner graph is also presented at the destination. Theoretical analysis
Lei Tang, Fengfan Yang, Shunwai Zhang, Ejaz Saqib, Lin Luo   +4 more
openaire   +1 more source

Improved PEG construction of large girth QC-LDPC codes

2016 9th International Symposium on Turbo Codes and Iterative Information Processing (ISTC), 2016
In this paper, we present an improvement of the PEG algorithm for constructing quasi-cyclic low-density parity-check (QC-LDPC) codes with large girth. We introduce the concept of PEG-undetectable cycles on the computation tree in the PEG algorithm for QC-LDPC codes and give a predictive method to avoid these undetected cycles. The aim is to select only
Madiagne Diouf, David Declercq, Marc P. C. Fossorier, Samuel Ouya, Bane Vasic   +4 more
openaire   +1 more source

Column-Weight Three QC LDPC Codes with Girth 20

IEEE Communications Letters, 2013
In this paper, some well-structured block designs are presented whose incidence matrices can be considered as the mother matrices of some regular and irregular column-weight three quasi cyclic low-density parity-check codes of girth 20. The class of LDPC codes derived from our construction possesses much more flexibility in terms of code length and ...
Mohammad Gholami, Mehdi Samadieh, Ghaffar Raeisi   +2 more
openaire   +1 more source

Implementation for JSCC Scheme Based on QC-LDPC Codes

2022 IEEE 11th Global Conference on Consumer Electronics (GCCE), 2022
Longyu Ma, Chiu-Wing Sham, Jia Zhan, Francis C. M. Lau 0002   +3 more
openaire   +1 more source

QC-LDPC codes from various Golomb Rulers

2023 14th International Conference on Information and Communication Technology Convergence (ICTC), 2023
Daekyeong Kim, Hyojeong Choi, Hong-Yeop Song   +2 more
openaire   +1 more source