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Optimal power allocation for HARQ schemes over time-correlated Nakagami-m fading channels
Shi Z.1; Ma S.1; Hou F.1; Tam K.-W.1; Wu Y.-C.2
2017-01-25
Conference NameIEEE International Conference on Communication Systems (ICCS)
Source Publication2016 IEEE International Conference on Communication Systems, ICCS 2016
Conference DateDEC 14-16, 2016
Conference PlaceShenzhen, PEOPLES R CHINA
CountryChina
Author of SourceIEEE
Publication Place345 E 47TH ST, NEW YORK, NY 10017 USA
PublisherIEEE
Abstract

This paper investigates the problem of power allocation for hybrid automatic repeat request (HARQ) schemes over time-correlated Nakagami-m fading channels under outage constraint. The presence of time correlation complicates the power allocation problem due to the involvement of multiple correlated fading channels. Under a general time-correlated Nakagami-m fading channel with exponential correlation, outage probabilities for three widely adopted HARQ schemes, including Type I HARQ, HARQ with chase combining (HARQ-CC) and HARQ with incremental redundancy (HARQ-IR), are first derived. With these results, power allocation schemes are proposed to minimize the average total transmission power with guaranteed outage performance. Simulation results demonstrate the accuracy of our outage analysis and the effectiveness of our proposed power allocation schemes. It is shown that our proposed power allocation schemes can achieve significant power savings when compared with fixed power allocation. Moreover, under practical low outage constraint, the power efficiency is further improved when the time correlation is reduced and/or the fading order is increased.

KeywordHybrid Automatic Repeat Request Power Allocation Time-correlated Nakagami-m Fading
DOI10.1109/ICCS.2016.7833558
URLView the original
Indexed BySCI
Language英语
WOS Research AreaTelecommunications
WOS SubjectTelecommunications
WOS IDWOS:000401807600009
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionDEPARTMENT OF ELECTRICAL AND COMPUTER ENGINEERING
Affiliation1.Universidade de Macau
2.The University of Hong Kong
Recommended Citation
GB/T 7714
Shi Z.,Ma S.,Hou F.,et al. Optimal power allocation for HARQ schemes over time-correlated Nakagami-m fading channels[C]//IEEE. 345 E 47TH ST, NEW YORK, NY 10017 USA:IEEE,2017.
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