Results 91 to 100 of about 69,988 (217)

非二进制准循环低密度校验码的性能研究

Guangtongxin yanjiu, 2012
为提高100Gbit/s光通信系统的传输距离,构造了高增益的NB-QC-LDPC（非二进制准循环低密度校验码）,这种纠错码构建在伽罗华域上,适合于采用QPSK（正交相移键控）或DQPSK（差分正交相移键控）调制格式的100Gbit/s系统。文章采用对数傅里叶和积译码算法分析了NB-QC-LDPC的误码性能。结果表明,与二进制准循环低密度校验码相比,码长为500、码率为0.8的NB-QC-LDPC,在误码率为10-8时可提供约1dB的编码增益。同样,在误码率为10-8时,若码率从0.9降低至0.8,NB ...
林智强, 张建勇
doaj  

High-Rate QC LDPC Codes of Short and Moderate Length with Good Girth Profile [PDF]

, 2011
Irregular QC LDPC codes with parity-check matrices having different degree distributions are studied. A new algorithm for finding regular and irregular QC LDPC codes with a good girth profile as well as a good sliding-window girth is presented.
Kudryashov, Boris,, Bocharova, Irina, Rolf Johannesson, Kudryashov, Boris, Irina E. Bocharova, Florian Hug, Boris D. Kudryashov, Johannesson, Rolf,, Bocharova, Irina,, Johannesson, Rolf, Lund University., Hug, Florian, Hug, Florian,   +12 more
core   +1 more source

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

Construction of Irregular QC-LDPC Codes via Masking with ACE Optimization [PDF]

, 2014
Quasi-cyclic low-density parity-check (QC-LDPC) codes constructed by using algebraic approaches, such as finite geometry and finite field, generally have good structural properties and very low error-floors, and facilitate hardware implementation ...
Kong, Lingjun, Guan, Yong Liang, Han, Guojun   +2 more
core   +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

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  

SYSTEMATIC BLOCK QC-LDPC UNTUK SISTEM KOMUNIKASI BERLATENSI RENDAH DAN RELIABLE [PDF]

, 2017
Teknologi telekomunikasi generasi kelima (5G) mensyaratkan bahwa beberapa aplikasi jaringan masa depan harus memenuhi garansi latensi t 1 ms serta ultra reliable.
YOGA JULIAN
core  

On the Design and Implementation and Evaluation of Euclidean Geometry Quasi-Cyclic LDPC Codes for NAND Flash Memories

IEEE Open Journal of the Communications Society
As data storage demands continue to grow, ensuring the reliability of NAND flash devices after a large number of Program/Erase (P/E) cycles have elapsed has become a critical requirement.
G. Achala, U. Shripathi Acharya, Pathipati Srihari, Linga Reddy Cenkeramaddi   +3 more
doaj   +1 more source

Non-binary protograph low-density parity-check codes for space communications [PDF]

, 2012
Protograph-based non-binary low-density parity-check (LDPC) codes with ultra-sparse parity-check matrices are compared with binary LDPC and turbo codes (TCs) from space communication standards.
Paolini, Enrico, G. Liva, B. Matuz, L. Costantini, Liva, Gianluigi, Chiani, Marco, Costantini, Laura, Matuz, Balazs   +7 more
core   +1 more source

Topology-Aware Exploration of Energy-Based Models Equilibrium: Toric QC-LDPC Codes and Hyperbolic MET QC-LDPC Codes [PDF]

This paper presents a method for achieving equilibrium in the ISING Hamiltonian when confronted with unevenly distributed charges on an irregular grid.
Sapozhnikov, Denis, Egorov, Sergey, Usatyuk, Vasiliy   +2 more
core   +1 more source