Results 71 to 80 of about 35,523 (280)
Electronics Letters, Volume 61, Issue 1, January/December 2025.Here, a multi‐user signal iterative detection and decoding scheme named LBEP based on block expectation propagation (BEP) is proposed for LDPC‐coded two‐phase unsourced random access (URA) scheme. In the iteratively process, the approximation of matrix inversion is used to facilitate expectation propagation (EP). The numerical results show that, in the
Jinyang Chen +5 more
wiley +1 more source
Construction of High-Rate Regular Quasi-Cyclic LDPC Codes Based on Cyclic Difference Families [PDF]
, 2012 For a high-rate case, it is difficult to randomly construct good low-density parity-check (LDPC) codes of short and moderate lengths because their Tanner graphs are prone to making short cycles. Also, the existing high-rate quasi-cyclic (QC) LDPC codes can be constructed only for very restricted code parameters. In this paper, a new construction method
arxiv +1 more source
Construction of Quantum LDPC Codes From Classical Row-Circulant QC-LDPCs [PDF]
IEEE Communications Letters, 2016 Classical row-circulant quasi-cyclic (QC) low-density parity check (LDPC) matrices are known to generate efficient high-rate short and moderate-length QC-LDPC codes, while the comparable random structures exhibit numerous short cycles of length-4. Therefore, we conceive a general formalism for constructing nondual-containing Calderbank–Shor–Steane (CSS)
Babar, Zunaira +4 more
openaire +4 more sources
5G‐coded fluid antenna multiple access over block fading channels
Electronics Letters, Volume 61, Issue 1, January/December 2025.This letter investigates the use of 5G New Radio (NR) Modulation Coding Scheme (MCS) for FAMA systems to improve its connectivity over block fading channels. In particular, we propose an iterative decoding receiver with iterative interference covariance estimation, designed explicitly for slow fading channels.
Hanjiang Hong +4 more
wiley +1 more source
On the Hub Number of Ring Graphs and Their Behavior Under Graph Operations
International Journal of Mathematics and Mathematical Sciences, Volume 2025, Issue 1, 2025.This study examines the hub number of ring graphs and investigates their behavior under operations such as union, intersection, and join. Different findings for this parameter are found for a variety of types of ring graphs, such as commutative ring graphs, path ring graphs, complete ring graphs, cycle ring graphs, and star ring graphs, for which the ...
Mohammed Alsharafi +3 more
wiley +1 more source
Temperature Monitoring of Mass Concrete Structure Using Wireless Sensing System
Structural Control and Health Monitoring, Volume 2025, Issue 1, 2025.Rapid temperature changes during the early stages of mass concrete construction can cause thermal cracking, which negatively impacts structural integrity and longevity. Reliable temperature monitoring is essential for effective crack control. Traditional methods, such as manual inspections and wired structural health monitoring systems, are often ...
Tengyi Wang +4 more
wiley +1 more source
Sub-Graph Based Joint Sparse Graph for Sparse Code Multiple Access Systems
IEEE Access, 2018 Sparse code multiple access (SCMA) is a promising air interface candidate technique for next-generation mobile networks, especially for massive machine-type communications. In this paper, we design a low-density parity-check (LDPC) coded SCMA detector by
Ke Lai +5 more
doaj +1 more source
Empirical modelling and analysis of phase noise in OFDM systems
IET Communications, Volume 18, Issue 19, Page 1358-1370, December 2024.Based on empirical data of an orthogonal frequency division multiplexing system, a new analytical model of phase noise and numerical characteristics of the common phase error and intercarrier interference are derived. When applied to estimate original symbols based on AWGN channel, the proposed algorithm based on the model performs better than the ...
Qihong Duan, Heng Du, Jiang Xue, Feng Li
wiley +1 more source
IET Communications, Volume 18, Issue 20, Page 1795-1812, December 2024.The article proposes the novel distributed generalized Reed‐Solomon coded differential spatial modulation (DGRSC‐DSM) scheme, where two selection algorithms are developed at the relay to optimize the final code with a better weight enumeration. Based on the specific structure of the GRS codes and the selection mode, the novel Smart‐joint decoding ...
Chen Chen, Fengfan Yang
wiley +1 more source
Performance Comparison of LDPC Block and Spatially Coupled Codes over GF(q) [PDF]
arXiv, 2014 In this paper, we compare the finite-length performance of protograph-based spatially coupled low-density parity-check (SC-LDPC) codes and LDPC block codes (LDPC-BCs) over GF(q). In order to reduce computational complexity and latency, a sliding window decoder with a stopping rule based on a soft bit-error-rate (BER) estimate is used for the q-ary SC ...
arxiv