Results 251 to 260 of about 2,457,220 (279)
Some of the next articles are maybe not open access.
Low-Rate PBRL-LDPC Codes for URLLC in 5G
IEEE Wireless Communications Letters, 2018In this letter, we propose a class of rate-compatible raptor-like protographs, which is aimed at the design of low-rate low-density parity-check (LDPC) codes with short length and fast convergence for ultra-reliable and low-latency communications in 5G ...
Xiaoning Wu +4 more
semanticscholar +1 more source
The Design of Protograph LDPC Codes as Source Codes in a JSCC System
IEEE Communications Letters, 2018Although joint source-channel coding (JSCC) based on double protograph low-density parity-check (LDPC) codes has been shown to be an excellent solution for wireless communication, the protograph LDPC code for source coding needs to be optimized to ...
Chen Chen, Lin Wang, Sanya Liu
semanticscholar +1 more source
Analytical Lower Bound on the Lifting Degree of Multiple-Edge QC-LDPC Codes With Girth 6
IEEE Communications Letters, 2018Multiple-edge protographs have some advantages over single-edge protographs, such as potentially having larger minimum Hamming distance. However, most of results in the literature are related to the construction of single-edge quasi-cyclic low-density ...
Mohammad-Reza Sadeghi, F. Amirzade
semanticscholar +1 more source
Improved reversible LDPC codes
Proceedings. International Symposium on Information Theory, 2005. ISIT 2005., 2005We provide a thorough analysis for a class of iteratively encodable low-density parity-check codes. The iterative encoding technique is based upon the graphical representation of the code and allows the decoder circuit to also be used for encoding, thus saving circuit area.
David Victor Lawrie Haley, Alex Grant
openaire +3 more sources
Efficient Search of Girth-Optimal QC-LDPC Codes
IEEE Transactions on Information Theory, 2016In this paper, we study the cycle structure of quasi-cyclic (QC) low-density parity-check (LDPC) codes with the goal of obtaining the shortest code with a given degree distribution and girth.
Alireza Tasdighi +2 more
semanticscholar +1 more source
2021
Low-density parity-check (LDPC) codes are a class of linear block codes that were first presented by Gallager in 1962. These codes have been the subject of much interest due to the fact that they can perform near Shannon limit. In this talk we study low-density parity-check (LDPC) codes having cubic semisymmetric graphs as their Tanner graphs.
Šimac, Marina +2 more
openaire +1 more source
Low-density parity-check (LDPC) codes are a class of linear block codes that were first presented by Gallager in 1962. These codes have been the subject of much interest due to the fact that they can perform near Shannon limit. In this talk we study low-density parity-check (LDPC) codes having cubic semisymmetric graphs as their Tanner graphs.
Šimac, Marina +2 more
openaire +1 more source
Symmetrical Constructions for Regular Girth-8 QC-LDPC Codes
IEEE Transactions on Communications, 2017In this paper, we propose new constructions for regular girth-8 quasi-cyclic low-density parity-check (QC-LDPC) codes based on circulant permutation matrices (CPM).
Alireza Tasdighi +2 more
semanticscholar +1 more source
An Improvement on LDPC Coded Queued Codes
IEEE GLOBECOM 2008 - 2008 IEEE Global Telecommunications Conference, 2008The queued-code based on low-density parity-check (LDPC) codes, which exploit both the near Shannon-limit performance LDPC codes and the instantaneous channel state information (CSI), can provide excellent performance in the block fading channels. The existing work utilized the conventional random puncturing and repetition operation, which may lead to ...
Ming Jiang +3 more
openaire +2 more sources
Syndrome coding of video with LDPC codes
2008 9th International Conference on Signal Processing, 2008In this paper we present the simulation results of the video coding system based on the principle of distributed source coding. Unlike conventional video coding system, this system exploits source statistics at the decoder, thus reversing the complexity model. Current implementation uses LDPC codes for syndrome coding.
S. Reddy, P. S. Aparna, S Sumam David
openaire +2 more sources
Searching for Binary and Nonbinary Block and Convolutional LDPC Codes
IEEE Transactions on Information Theory, 2016A unified approach to search for and optimize codes determined by their sparse parity-check matrices is presented. Replacing the nonzero elements of a binary parity-check matrix (the base or parent matrix) either by circulants or by companion matrices of
I. Bocharova +2 more
semanticscholar +1 more source