Maximizing Expected Achievable Rates for Block-Fading Buffer-Aided Relay Channels

Handle URI:
http://hdl.handle.net/10754/622564
Title:
Maximizing Expected Achievable Rates for Block-Fading Buffer-Aided Relay Channels
Authors:
Shaqfeh, Mohammad; Zafar, Ammar; Alnuweiri, Hussein; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 )
Abstract:
In this paper, the long-term average achievable rate over block-fading buffer-aided relay channels is maximized using a hybrid scheme that combines three essential transmission strategies, which are decode-and-forward, compress-and-forward, and direct transmission. The proposed hybrid scheme is dynamically adapted based on the channel state information. The integration and optimization of these three strategies provide a more generic and fundamental solution and give better achievable rates than the known schemes in the literature. Despite the large number of optimization variables, the proposed hybrid scheme can be optimized using simple closed-form formulas that are easy to apply in practical relay systems. This includes adjusting the transmission rate and compression when compress-and-forward is the selected strategy based on the channel conditions. Furthermore, in this paper, the hybrid scheme is applied to three different models of the Gaussian block-fading buffer-aided relay channels, depending on whether the relay is half or full duplex and whether the source and the relay have orthogonal or non-orthogonal channel access. Several numerical examples are provided to demonstrate the achievable rate results and compare them to the upper bounds of the ergodic capacity for each one of the three channel models under consideration.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Shaqfeh M, Zafar A, Alnuweiri H, Alouini M-S (2016) Maximizing Expected Achievable Rates for Block-Fading Buffer-Aided Relay Channels. IEEE Transactions on Wireless Communications 15: 5919–5931. Available: http://dx.doi.org/10.1109/TWC.2016.2572690.
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Transactions on Wireless Communications
Issue Date:
25-May-2016
DOI:
10.1109/TWC.2016.2572690
Type:
Article
ISSN:
1536-1276
Sponsors:
This work was supported by the National Priorities Research Program through the Qatar National Research Fund (a member of Qatar Foundation) under Grant 8-1531-2-651. The work of M.-S. Alouini was supported by the King Abdullah University of Science and Technology.
Additional Links:
http://ieeexplore.ieee.org/document/7478633/
Appears in Collections:
Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorShaqfeh, Mohammaden
dc.contributor.authorZafar, Ammaren
dc.contributor.authorAlnuweiri, Husseinen
dc.contributor.authorAlouini, Mohamed-Slimen
dc.date.accessioned2017-01-02T09:55:30Z-
dc.date.available2017-01-02T09:55:30Z-
dc.date.issued2016-05-25en
dc.identifier.citationShaqfeh M, Zafar A, Alnuweiri H, Alouini M-S (2016) Maximizing Expected Achievable Rates for Block-Fading Buffer-Aided Relay Channels. IEEE Transactions on Wireless Communications 15: 5919–5931. Available: http://dx.doi.org/10.1109/TWC.2016.2572690.en
dc.identifier.issn1536-1276en
dc.identifier.doi10.1109/TWC.2016.2572690en
dc.identifier.urihttp://hdl.handle.net/10754/622564-
dc.description.abstractIn this paper, the long-term average achievable rate over block-fading buffer-aided relay channels is maximized using a hybrid scheme that combines three essential transmission strategies, which are decode-and-forward, compress-and-forward, and direct transmission. The proposed hybrid scheme is dynamically adapted based on the channel state information. The integration and optimization of these three strategies provide a more generic and fundamental solution and give better achievable rates than the known schemes in the literature. Despite the large number of optimization variables, the proposed hybrid scheme can be optimized using simple closed-form formulas that are easy to apply in practical relay systems. This includes adjusting the transmission rate and compression when compress-and-forward is the selected strategy based on the channel conditions. Furthermore, in this paper, the hybrid scheme is applied to three different models of the Gaussian block-fading buffer-aided relay channels, depending on whether the relay is half or full duplex and whether the source and the relay have orthogonal or non-orthogonal channel access. Several numerical examples are provided to demonstrate the achievable rate results and compare them to the upper bounds of the ergodic capacity for each one of the three channel models under consideration.en
dc.description.sponsorshipThis work was supported by the National Priorities Research Program through the Qatar National Research Fund (a member of Qatar Foundation) under Grant 8-1531-2-651. The work of M.-S. Alouini was supported by the King Abdullah University of Science and Technology.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.urlhttp://ieeexplore.ieee.org/document/7478633/en
dc.subjectRelay channelen
dc.subjectblock-fadingen
dc.subjectdecode-and-forwarden
dc.subjectcompress-and-forwarden
dc.subjectbuffer-aided relayingen
dc.titleMaximizing Expected Achievable Rates for Block-Fading Buffer-Aided Relay Channelsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalIEEE Transactions on Wireless Communicationsen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, Texas A and M University at Qatar, PO Box 23874, Doha, Qataren
dc.contributor.institutionSchool of Computing and Communications, University of Technology Sydney, Ultimo, NSW, Australiaen
kaust.authorAlouini, Mohamed-Slimen
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