Results 51 to 60 of about 1,654 (206)
IEEE Photonics Journal, 2022 Sparse code multiple access (SCMA) is a promising technology to provide high throughput and overall improved system performance at affordable cost for next-generation passive optical networks (NG-PONs).
Hui Yang +4 more
doaj +1 more source
Limnology and Oceanography, Volume 71, Issue 4, April 2026.Abstract Variability in nutrient supply is a defining feature of oligotrophic oceans, yet how nutrient fluxes shape consumer physiology and population structure remains poorly resolved. Here, we examine how diazotrophic nitrogen fixation relates to stoichiometric metabolism and genetic structure in the widespread pelagic copepod Pleuromamma xiphias ...
Kazutaka Takahashi +5 more
wiley +1 more source
RIS-Aided SCMA-Based SWIPT Systems: Design and Optimization
, 2023 The amalgamation of sparse code multiple access (SCMA) and simultaneous wireless information and power transfer (SWIPT) is envisioned to be a promising solution to massive connectivity while providing both information and power to myriads of wireless ...
Lingyun Chai +9 more
core +1 more source
IEEE Access, 2018 Sparse code multiple access (SCMA) is a promising candidate air interface of next-generation mobile networks. In this paper, we focus on a downlink SCMA system where a transmitter sends confidential messages to multiple users in the presence of external ...
Ke Lai +5 more
doaj +1 more source
Application of SCMA Based on LoRaWAN Architecture
, 2022 Low-power Wide-Area Network (LPWAN), as a wireless connection technology of the Internet of things, has met the requirements of power consumption of network providers and operators, network coverage and Internet of things equipment. As the main technology of LPWAN, Long Range (LoRa) has entered the stage of scale deployment.
Minhao Jin +3 more
openaire +1 more source
Novel Fault‐ Detection Implementation of FIR Filters Based on Multilevel Current‐Mode Berger Codes
IET Computers &Digital Techniques, Volume 2026, Issue 1, 2026.Soft errors pose a significant threat to the reliability of digital circuits, especially in harsh environments. While traditional error detection and correction techniques, such as Hamming codes and dual modular redundancy (DMR), have been widely employed, they often incur significant hardware overhead.
Reza Omidi, Seok-Bum Ko
wiley +1 more source
SCMA Spectral and Energy Efficiency with QoS [PDF]
GLOBECOM 2020 - 2020 IEEE Global Communications Conference, 2020 GC
Samira Jaber +3 more
openaire +2 more sources
Communication‐Security Co‐Design for Federated Learning in Grant‐Free NOMA IoT Networks
IET Communications, Volume 20, Issue 1, January/December 2026.This article presents SA‐PPO, a Security‐Aware Proximal Policy Optimisation framework for federated learning over grant‐free NOMA (non‐orthogonal multiple access) in IoT networks. By jointly optimising access control, resource allocation, and trust‐weighted aggregation using cross‐layer indicators, SA‐PPO enhances both communication reliability and ...
Emmanuel Atebawone +5 more
wiley +1 more source
Dual‐mode codeword position index based SCMA with transmit diversity
IET CommunicationsCodeword position index based sparse code multiple access (CPI‐SCMA) is an effective scheme that expands codeword positions in the time domain and carries extra information by their index.
Yanbing Yang, Jing Lei, Ke Lai
doaj +1 more source
Message Passing Algorithm Receiver Design for RIS-Assisted Downlink MIMO-SCMA System
Applied SciencesSparse code multiple access (SCMA) and reconfigurable intelligent surfaces (RISs) are two promising techniques in the forthcoming 6G communication networks to provide massive connectivity and enhance the spectral efficiency.
Dun Feng +5 more
doaj +1 more source