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Conference Paper: Optimal power allocation for HARQ schemes over time-correlated Nakagami-m fading channels

TitleOptimal power allocation for HARQ schemes over time-correlated Nakagami-m fading channels
Authors
Issue Date2016
PublisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000102
Citation
2016 IEEE International Conference on Communication Systems (ICCS), Shenzhen, China, 14-16 December 2016 How to Cite?
AbstractThis 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.
Persistent Identifierhttp://hdl.handle.net/10722/243320
ISBN

 

DC FieldValueLanguage
dc.contributor.authorShi, Z-
dc.contributor.authorMa, S-
dc.contributor.authorHou, F-
dc.contributor.authorTam, KW-
dc.contributor.authorWu, YC-
dc.date.accessioned2017-08-25T02:53:16Z-
dc.date.available2017-08-25T02:53:16Z-
dc.date.issued2016-
dc.identifier.citation2016 IEEE International Conference on Communication Systems (ICCS), Shenzhen, China, 14-16 December 2016-
dc.identifier.isbn978-1-5090-3423-9-
dc.identifier.urihttp://hdl.handle.net/10722/243320-
dc.description.abstractThis 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.-
dc.languageeng-
dc.publisherIEEE. The Journal's web site is located at http://ieeexplore.ieee.org/xpl/conhome.jsp?punumber=1000102-
dc.relation.ispartofIEEE International Conference on Communication Systems-
dc.rightsIEEE International Conference on Communication Systems. Copyright © IEEE.-
dc.rights©2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.-
dc.titleOptimal power allocation for HARQ schemes over time-correlated Nakagami-m fading channels-
dc.typeConference_Paper-
dc.identifier.emailWu, YC: ycwu@eee.hku.hk-
dc.identifier.authorityWu, YC=rp00195-
dc.identifier.doi10.1109/ICCS.2016.7833558-
dc.identifier.hkuros274733-
dc.publisher.placeUnited States-

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