Results 1 to 10 of about 204 (112)
Hybrid Automatic Repeat Request (HARQ) in Wireless Communications Systems and Standards: A Contemporary Survey [PDF]
IEEE Communications Surveys & Tutorials, 2021 <div>Automatic repeat request (ARQ) schemes, and in particular hybrid-ARQ (HARQ) schemes, which jointly adopt forward error correction (FEC) and ARQ, are essential to provide reliable data transmission in wireless communications systems. However, the feedback from the receiver to the transmitter and the retransmission process used in ARQ incurs ...
Ashfaq Ahmed +5 more
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On the Secure Performance of Intelligent Reflecting Surface-Assisted HARQ Systems [PDF]
Entropy, 2023 This paper analyzes the physical layer security performance of hybrid automatic repeat request (HARQ) systems with the assistance of an intelligent reflecting surface (IRS) and aims to reveal the primary factors that enhance PLS.
Yue Wu +4 more
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Layered HARQ Design for LDPC-Based Multi-Level Coded Modulation [PDF]
EntropyMulti-level coded modulation (MLCM) enhances data transmission by allocating error correction more effectively to bits with higher error probabilities, thus optimizing redundancy and improving performance.
Yuejun Wei +4 more
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Delay-Sensitive NOMA-HARQ for Short Packet Communications [PDF]
Entropy, 2021 This paper investigates the two-user uplink non-orthogonal multiple access (NOMA) paired with the hybrid automatic repeat request (HARQ) in the finite blocklength regime, where the target latency of each user is the priority. To limit the packet delivery
Faisal Nadeem +3 more
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Reliable and Energy-Efficient LEO Satellite Communication with IR-HARQ via Power Allocation [PDF]
Sensors, 2022 This paper examines reliable and energy-efficient transmission in low earth orbit (LEO) satellite communication systems. In particular, we analyze the link transmission characteristics of the LEO satellite to the ground user and model the channel as a ...
Hongxiu Bian, Rongke Liu
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An Adaptive Hybrid Automatic Repeat Request (A-HARQ) Scheme Based on Reinforcement Learning
Electronics, 2023 V2X communication is susceptible to attenuation and fading caused by external interference. This interference often leads to bit error and poor quality and stability of the wireless link, and it can easily disrupt packet transmission. In order to enhance communication reliability, the 3rd Generation Partnership Project (3GPP) introduced the Hybrid ...
Shih-Yang Lin, Miao-Hui Yang, Shuo Jia
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HARQ Performance Limits for Free-Space Optical Communication Systems [PDF]
EntropyFree-space optical (FSO) communications represent an attractive technology for future high-capacity wireless and satellite networks, offering multi-Gbps data rates, unlicensed spectrum, and built-in physical-layer security.
Giorgio Taricco
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Hybrid ARQ Scheme with Autonomous Retransmission for Multicasting in Wireless Sensor Networks [PDF]
Sensors, 2017 A new hybrid automatic repeat request (HARQ) scheme for multicast service for wireless sensor networks is proposed in this study. In the proposed algorithm, the HARQ operation is combined with an autonomous retransmission method that ensure a data packet
Young-Ho Jung, Jihoon Choi
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IEEE Access, 2016 The cognitive radio (CR) paradigm has the potential of improving the exploitation of the electromagnetic spectrum by detecting instantaneously unoccupied spectrum slots allocated to primary users (PUs).
Ateeq Ur Rehman +3 more
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IEEE Access, 2016 Cognitive radio (CR) techniques have been proposed for improving the spectral efficiency by exploiting the temporarily unoccupied segments of the licensed spectrum, provided that the transmission of primary users (PUs) is not hampered.
Ateeq Ur Rehman +4 more
doaj +3 more sources