Results 81 to 90 of about 10,016 (203)

Methods of Sparse Measurement Matrix Optimization for Compressed Sensing

IET Signal Processing, Volume 2025, Issue 1, 2025.
In compressed sensing (CS), a sparse measurement matrix with few nonzero entries is more competitive than a dense matrix in reducing the number of multiplication units. Recent studies indicate that an optimized measurement matrix having low coherence with a specified dictionary can significantly improve the reconstruction performance.
Renjie Yi, Shunan Han, Peng Liu, Bo Zhang, Hang Liu, Chao Zhai   +5 more
wiley   +1 more source

Shortened Array Codes of Large Girth

, 2006
One approach to designing structured low-density parity-check (LDPC) codes with large girth is to shorten codes with small girth in such a manner that the deleted columns of the parity-check matrix contain all the variables involved in short cycles. This
Kashyap, Navin, Leyba, David, Milenkovic, Olgica   +2 more
core   +2 more sources

Blind Recognition Algorithm of Convolutional Code via Convolutional Neural Network

International Journal of Intelligent Systems, Volume 2025, Issue 1, 2025.
Pointing at the vexed question of blind recognition in the convolutional code class, this paper proposes a convolutional code blind identification method via convolutional neural networks (CNNs). First, this algorithm uses the traditional method to generate different convolutional codes, and the feature extraction algorithm adopts the theorem of Euclid’
Pan Deng, Tianqi Zhang, Lianghua Wen, Baoze Ma, Ying Wei, Linhao Cui, Weiwei Jiang   +6 more
wiley   +1 more source

Generic 5G NR LDPC Encoder Architecture Optimized for Area and Throughput

Journal of Electrical and Computer Engineering, Volume 2025, Issue 1, 2025.
Physical Downlink Shared Channel (PDSCH) in 5G New Radio (NR) uses LDPC codes as the channel coding solution for their efficient error‐correcting performance and suitability for high‐speed communications. To meet the high‐throughput requirements of the 5G NR technology, this paper discusses different 5G NR LDPC encoder architectures that enable ...
Muhammed Tarek, Eman Mohamed, Shaimaa ElSayed, Nahla Elashkar, Suman Lata Tripathi   +4 more
wiley   +1 more source

Construction of Short-length High-rates Ldpc Codes Using Difference Families [PDF]

, 2007
Low-density parity-check (LDPC) code is linear-block error-correcting code defined by sparse parity-check matrix. It isdecoded using the massage-passing algorithm, and in many cases, capable of outperforming turbo code.
Hamdani, D. (Deny), Safrianti, E. (Ery)
core  

Data Transmission System With High Data Rate for SDGSAT‐1 Small Satellite

International Journal of RF and Microwave Computer-Aided Engineering, Volume 2025, Issue 1, 2025.
A data transmission system is designed for the SDGSAT‐1 small satellite to meet the high‐speed data processing and transmission requirements. The data transmission system consists of two principal components: the transmitter and the steerable transmission antenna.
Huilin Tang, Yongsheng Deng, Dehai Zhang, Ali Gharsallah   +3 more
wiley   +1 more source

An Efficient Construction Method for Quasi-Cyclic Low Density Parity Check Codes

IEEE Access, 2017
In this paper, we propose an optimized belief propagation (OBP) based progressive edge-growth (PEG) method for constructing quasi-cyclic low density parity check (QC-LDPC) codes. In this proposed method, Tanner graphs are built by progressively appending
Yiming Lei, Mingke Dong
doaj   +1 more source

Semi-random and semi-algebraic structural design for IRA-LDPC codes

Tongxin xuebao, 2014
A method of semi-random and semi-algebraic structure was presented for constructing the low-density parity-check matrix that corresponds to the information bits of the IRA codes.Compared with the existing structural LDPC codes,the distinct advantage of ...
Li PENG, Qi ZHANG, Bo WANG, Tao CHEN
doaj   +2 more sources

High-Speed Reconciliation for CVQKD Based on Spatially Coupled LDPC Codes

IEEE Photonics Journal, 2018
The speed of continuous variable quantum key distribution is limited by the reconciliation efficiency and the reconciliation frame error rate (FER) in the reconciliation phase.
Xue-Qin Jiang, Siyuan Yang, Peng Huang, Guihua Zeng   +3 more
doaj   +1 more source

Design of LDPC code for uncorrelated Rayleigh fading channel using modified outage probability

ICT Express
In this paper, we propose a new design metric called modified outage probability (MOP) for protograph-based low-density parity-check (LDPC) codes over the uncorrelated Rayleigh fading channel.
Woong-Shin Kwak, Jae-Won Kim
doaj   +1 more source