Results 61 to 70 of about 256 (160)

Girth Analysis of Tanner’s (3, 17)-Regular QC-LDPC Codes Based on Euclidean Division Algorithm

IEEE Access, 2019
In this paper, the girth distribution of the Tanner’s (3, 17)-regular quasi-cyclic LDPC (QC-LDPC) codes with code length $17p$ is determined, where $p$ is a prime and $p \equiv 1~(\bmod ~51)$ .
Hengzhou Xu, Yake Duan, Xiaoxiao Miao, Hai Zhu   +3 more
doaj   +1 more source

Research on LDPC Coding for Free Space Optical Communication with Modified Bessel-Gaussian Beams Based on K-distribution

MATEC Web of Conferences, 2018
We investigate the performance of low-density parity-check (LDPC) coding for free space optical communication (FSO) with modified Bessel-Gaussian (MBG) beams based on K-distribution.
Wang Jin, Zeng Fujiang, Liang Qingqing, Zhang Xiaofeng   +3 more
doaj   +1 more source

Efficient Network for Non-Binary QC-LDPC Decoder

, 2011
This paper presents approaches to develop efficient network for non-binary quasi-cyclic LDPC (QC-LDPC) decoders. By exploiting the intrinsic shifting and symmetry properties of the check matrices, significant reduction of memory size and routing complexity can be achieved.
Zhang, Chuan, Parhi, Keshab K.
openaire   +2 more sources

光通信中基于伽罗华域的QC-LDPC码构造方法

Guangtongxin yanjiu, 2014
为了满足光通信系统对纠错码高码率、低误码率的要求,基于伽罗华域中域的特征提出了一种结构简单、易于编码并且可以有效避免四环的QC-LDPC（准循环低密度奇偶校验）码的新构造方法。并运用该方法构造了适用于光通信系统的FCQC-LDPC（基于域特征的QC-LDPC）（3969,3729）码。仿真结果表明,在误码率=10-7时,所构造的码率为0.937的FC-QCLDPC（3969,3729）码的NCG（净编码增益）比QC-LDPC（4288,4020）码提高了约0.15dB,比Linshu-QC-LDPC ...
黄胜, 贾雪婷, 田方方, 袁建国
doaj  

Floor Scale Modulo Lifting for QC-LDPC codes

, 2017
7 pages, 2 ...
Polyanskii, Nikita, Usatyuk, Vasiliy, Vorobyev, Ilya   +2 more
openaire   +2 more sources

Optimized Puncturing of the Check Matrix for Rate-Compatible LDPC Codes

MATEC Web of Conferences, 2018
In the wireless communication system, it is necessary to change the transmitted code word or code rate in real time according to the channel environment, designing and implementing rate compatible codes is of great practical significance.
Zhang Liang, Meng Jiahui, Zhao Danfeng
doaj   +1 more source

Construction Method of QC-LDPC Codes with Big Girth for Fast Encoding [PDF]

Jisuanji gongcheng, 2018
The sub-matrices on both diagonals of the right half of the check matrix are unit matrices.Existence of the deterministic unit matrix not only destroys the randomness of Quasie Cyclic-Low Density Parity Check(QC-LDPC) code,it leads to a certain loss of ...
PENG Haiying,YANG Jian,SUN Lijun
doaj  

Low Complexity Encoder of High Rate Irregular QC-LDPC Codes for Partial Response Channels

Advances in Electrical and Computer Engineering, 2011
High rate irregular QC-LDPC codes based on circulant permutation matrices, for efficient encoder implementation, are proposed in this article. The structure of the code is an approximate lower triangular matrix.
IMTAWIL, V., MEESOMBOON, A., KUPIMAI, M.
doaj   +1 more source

Short Blocklength Nonbinary Raptor-Like LDPC Coding Systems Design and Simulation

IEEE Access
This paper explores an efficient rate-adaptive error correction coding scheme with a nonbinary (NB) $\mathrm {GF}(2^{q})$ extension of Raptor-like (RL) quasi-cyclic (QC) subclass of Low-Density Parity-Check (LDPC) codes.
Jakub Hyla, Wojciech Sulek
doaj   +1 more source

Design and Implementation of a Highly Efficient Quasi-Cyclic Low-Density Parity-Check Transceiving System Using an Overlapping Decoder. [PDF]

Sensors (Basel), 2023
Sun Y, Zhao L, Li J, Zhang Z, Yang X, Bu X.   +5 more
europepmc   +1 more source