Performance of Cognitive Stop-and-Wait Hybrid Automatic Repeat Request in the Face of Imperfect Sensing [PDF]
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
doaj +8 more sources
Performance of Cognitive Selective-Repeat Hybrid Automatic Repeat Request
IEEE Access, 2016 In this paper, a novel transmission protocol is proposed based on the classical selective-repeat hybrid automatic repeat to access a primary user (PU) channel, which is referred to as the CSR-HARQ.
Ateeq Ur Rehman +3 more
doaj +4 more sources
Intelligent hybrid automatic repeat request retransmission for multi‐band Wi‐Fi networks [PDF]
IET Communications, 2021 With the increase of Wi‐Fi connections and throughput, the problems posed by unreliable connection and unstable delay need to be urgently solved through advanced methods.
Zhou Wang +4 more
doaj +2 more sources
Enhanced Hybrid Automatic Repeat Request Scheduling for Non-Terrestrial IoT Networks
IEEE Open Journal of the Communications Society, 2023 Non-terrestrial networks (NTNs) complement their terrestrial counterparts in enabling ubiquitous connectivity globally by serving unserved and/or underserved areas of the world.
Gautham Prasad +3 more
doaj +3 more sources
Hybrid Automatic-Repeat-reQuest Systems for Cooperative Wireless Communications [PDF]
IEEE Communications Surveys and Tutorials, 2014 Hybrid-Automatic-Repeat-reQuest H-ARQ has become an indispensable technique in reliable communication systems. Hence, in this paper we review the state-of-art and investigate the performance of H-ARQ in the context of cooperative wireless communications.
Lajos Hanzo, Hoang Anh Ngo
exaly +2 more sources
Coordinated Hybrid Automatic Repeat Request [PDF]
IEEE Communications Letters, 2014 We develop a coordinated hybrid automatic repeat request (HARQ) approach. With the proposed scheme, if a user message is correctly decoded in the first HARQ rounds, its spectrum is allocated to other users, to improve the network outage probability and the users' fairness.
Thomas Eriksson +2 more
exaly +3 more sources
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
doaj +2 more sources
Hybrid automatic repeat request‐based intelligent reflecting surface‐assisted communication system [PDF]
Electronics Letters, 2021 The intelligent reflecting surface (IRS) is an emerging technique to extend wireless coverage. In this letter, the performance of the hybrid automatic repeat request (hybrid ARQ) for an IRS‐assisted system is analysed.
Yun Ai +4 more
doaj +3 more sources
Hybrid Automatic Repeat Request (HARQ) in Wireless Communications Systems and Standards: A Contemporary Survey [PDF]
IEEE Communications Surveys and 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 ...
Muhammad Naeem +2 more
exaly +3 more sources
Concatenated coding and hybrid automatic repeat request for wiretap channels
IET Communications, 2014 In this study, the authors propose an equivocation scheme for wiretap channels, which is composed of bit‐extension mapping, coset coding and hybrid automatic repeat request (HARQ). The inner bit‐extension code and outer coset code are used for equivocation of a wiretapper channel, whereas the HARQ scheme is to mitigate noisy errors in a main legitimate
Sunghwan Kim, Hyundong Shin
exaly +2 more sources