Results 41 to 50 of about 223 (130)
Insights Into Modulation and Coding Scheme in Mobile Communication
Discrete Dynamics in Nature and Society, Volume 2026, Issue 1, 2026.With the growing demand for mobile communications and the advancement of technology, reducing energy consumption has become a critical challenge. Overservice, which leads to unnecessary energy waste, is attracting significant attention from both academia and industry. An optimized modulation and coding scheme (MCS) can reduce the energy consumption per
Jing Liu +4 more
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Performance Evaluation of HARQ Schemes for the Internet of Things
Computers, 2018 Hybrid Automatic Repeat reQuest (HARQ) techniques are widely employed in the most important wireless systems, e.g., the Long Term Evolution (LTE) cellular standard, to increase the reliability of the communication.
Lorenzo Vangelista, Marco Centenaro
doaj +1 more source
DEStech Transactions on Engineering and Technology Research, 2016 Non-orthogonal multiple access (NOMA) has been proposed as a very promising candidate multiple access scheme for the 5th generation of wireless communication systems. The existing works of NOMA mainly focus on capacity analysis, power control, user pairing and scheduling, or combination with other technologies such as massive multiple-input multiple ...
openaire +2 more sources
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
IEEE Photonics Journal, 2014 In this paper, we investigate the performance of hybrid automatic repeat request (HARQ) with incremental redundancy (IR) and with code combining (CC) from an information-theoretic perspective over a point-to-point free-space optical (FSO) system.
Emna Zedini +2 more
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Photonics, 2022 Satellites in low earth orbit (LEO) are currently being deployed for numerous communication, positioning, space and Earth-imaging missions. To provide higher data rates in direct-to-user links and earth observation downlinks, the free-space optics ...
Theodore T. Kapsis +1 more
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Dynamic and efficient device collaborations in 5G‐advanced and 6G networks
IET Communications, Volume 18, Issue 19, Page 1437-1450, December 2024.Collaborative transmission, comprising multiple devices owned by a single user, is progressively evolving into an essential strategy to meet the stringent demands of burgeoning collaborative scenarios in 5G‐advanced and 6G networks. This paper proposes three novel use cases for device collaboration, namely data duplication, data splitting and wireless ...
Xianghui Han +5 more
wiley +1 more source
Diversity Techniques for Single-Carrier Packet Retransmissions over Frequency-Selective Channels
EURASIP Journal on Wireless Communications and Networking, 2009 In data packet communication systems over multipath frequency-selective channels, hybrid automatic repeat request (HARQ) protocols are usually used in order to ensure data reliability. For single-carrier packet transmission in slow fading environment, an
Inbar Fijalkow +2 more
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Dual‐mode codeword position index based SCMA with transmit diversity
IET Communications, Volume 18, Issue 17, Page 1002-1017, October 2024.This article provides a dual‐mode codeword position index based sparse code multiple access with transmit diversity scheme in which index bits are repeatedly transmitted to obtain a transmit diversity gain. According to simulation results and system analysis, the proposed scheme achieves a higher reliability with a slight loss of spectral efficiency ...
Yanbing Yang, Jing Lei, Ke Lai
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Enhanced semantic communication schemes for speech signals
Electronics Letters, Volume 60, Issue 8, April 2024.Two models to improve semantic communication systems are introduced. The first utilizes CBAM, considering attention in both channel and spatial domains, while the second uses the ECA network for complexity reduction. Experimental results demonstrate that the CBAM‐enhanced model notably enhances SDR performance in comparison to the existing SENet model,
Yerin Yeo +2 more
wiley +1 more source