dc.contributor.author Chelli, Ali dc.contributor.author Zedini, Emna dc.contributor.author Alouini, Mohamed-Slim dc.contributor.author Patzold, Matthias Uwe dc.contributor.author Balasingham, Ilangko dc.date.accessioned 2018-02-22T10:34:43Z dc.date.available 2018-02-22T10:34:43Z dc.date.issued 2018-01-15 dc.identifier.citation Chelli A, Zedini E, Alouini M-S, Patzold MU, Balasingham I (2018) Throughput and Delay Analysis of HARQ with Code Combining over Double Rayleigh Fading Channels. IEEE Transactions on Vehicular Technology: 1–1. Available: http://dx.doi.org/10.1109/TVT.2018.2794183. dc.identifier.issn 0018-9545 dc.identifier.issn 1939-9359 dc.identifier.doi 10.1109/TVT.2018.2794183 dc.identifier.uri http://hdl.handle.net/10754/627186 dc.description.abstract This paper proposes the use of hybrid automatic repeat request (HARQ) with code combining (HARQ-CC) to offer reliable communications over double Rayleigh channels. The double Rayleigh fading channel is of particular interest to vehicle-to-vehicle communication systems as well as amplify-and-forward relaying and keyhole channels. This work studies the performance of HARQ-CC over double Rayleigh channels from an information theoretic perspective. Analytical approximations are derived for the $\epsilon$-outage capacity, the average number of transmissions, and the throughput of HARQ-CC. Moreover, we evaluate the delay experienced by Poisson arriving packets for HARQ-CC. We provide analytical expressions for the average waiting time, the packets sojourn time, the average consumed power, and the energy efficiency. In our investigation, we take into account the impact of imperfect feedback on different performance metrics. Additionally, we explore the tradeoff between energy efficiency and the throughput. The proposed scheme is shown to maintain the outage probability below a specified threshold $\epsilon$ which ensures the link reliability. Meanwhile, HARQ-CC adapts implicitly the transmission rate to the channel conditions such that the throughput is maximized. Our results demonstrate that HARQ-CC allows improving the achievable communication rate compared to fixed time diversity schemes. To maximize the throughput of HARQ-CC, the rate per HARQ round should be less than the rate required to meet the outage constraint. Our investigation of the performance of HARQ-CC over Rayleigh and double Rayleigh channels shows that double Rayleigh channels have a higher severity of fading and result in a larger degradation of the throughput. Our analysis reveals that HARQ with incremental redundancy (HARQ-IR) achieves a larger throughput compared to HARQ-CC, while HARQ-CC is simpler to implement, has a lower decoding complexity, and requires less memory resources. dc.publisher Institute of Electrical and Electronics Engineers (IEEE) dc.relation.url http://ieeexplore.ieee.org/document/8259337/ dc.rights (c) 2018 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works. dc.subject code combining dc.subject delay analysis dc.subject Delays dc.subject double Rayleigh channel dc.subject energy efficiency dc.subject hybrid automatic repeat request (HARQ) dc.subject information outage capacity dc.subject Power system reliability dc.subject Probability dc.subject Rayleigh channels dc.subject Reliability dc.subject Throughput dc.subject throughput dc.subject Vehicle-to-vehicle communications dc.title Throughput and Delay Analysis of HARQ with Code Combining over Double Rayleigh Fading Channels dc.type Article dc.contributor.department Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division dc.contributor.department Electrical Engineering Program dc.contributor.department EE, KAUST, Thuwal, N/A Saudi Arabia 69000 dc.identifier.journal IEEE Transactions on Vehicular Technology dc.eprint.version Post-print dc.contributor.institution information and communication technology, Universitetet i Agder - Campus Grimstad, 243285 Grimstad, Aust Agder Norway dc.contributor.institution Hamad Bin Khalifa University, 370593 Doha, Ad Dawhah Qatar dc.contributor.institution Department of Information and Communication Technology, Universitetet i Agder - Campus Grimstad, 243285 Grimstad, Aust-Agder Norway 4898 dc.contributor.institution Department of Electronics and Telecommunications, NTNU Fakultet for ingeniorvitenskap og teknologi Trondheim, 98813 Trondheim, Sor-Trondelag Norway kaust.person Alouini, Mohamed-Slim refterms.dateFOA 2018-06-14T05:32:56Z dc.date.published-online 2018-01-15 dc.date.published-print 2018-05
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