Opportunistic Relay Selection With Limited Feedback

Handle URI:
http://hdl.handle.net/10754/594196
Title:
Opportunistic Relay Selection With Limited Feedback
Authors:
Eltayeb, Mohammed E.; Elkhalil, Khalil ( 0000-0001-7656-3246 ) ; Bahrami, Hamid Reza; Al-Naffouri, Tareq Y. ( 0000-0003-2843-5084 )
Abstract:
Relay selection is a simple technique that achieves spatial diversity in cooperative relay networks. Generally, relay selection algorithms require channel state information (CSI) feedback from all cooperating relays to make a selection decision. This requirement poses two important challenges, which are often neglected in the literature. Firstly, the fed back channel information is usually corrupted by additive noise. Secondly, CSI feedback generates a great deal of feedback overhead (air-time) that could result in significant performance hits. In this paper, we propose a compressive sensing (CS) based relay selection algorithm that reduces the feedback overhead of relay networks under the assumption of noisy feedback channels. The proposed algorithm exploits CS to first obtain the identity of a set of relays with favorable channel conditions. Following that, the CSI of the identified relays is estimated using least squares estimation without any additional feedback. Both single and multiple relay selection cases are considered. After deriving closed-form expressions for the asymptotic end-to-end SNR at the destination and the feedback load for different relaying protocols, we show that CS-based selection drastically reduces the feedback load and achieves a rate close to that obtained by selection algorithms with dedicated error-free feedback. © 1972-2012 IEEE.
KAUST Department:
Electrical Engineering Program
Citation:
Eltayeb ME, Elkhalil K, Bahrami HR, Al-Naffouri TY (2015) Opportunistic Relay Selection With Limited Feedback. IEEE Trans Commun 63: 2885–2898. Available: http://dx.doi.org/10.1109/tcomm.2015.2451629.
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Transactions on Communications
Issue Date:
Aug-2015
DOI:
10.1109/tcomm.2015.2451629
Type:
Article
ISSN:
0090-6778
Sponsors:
CRG3[ORS#2221]
Appears in Collections:
Articles; Electrical Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorEltayeb, Mohammed E.en
dc.contributor.authorElkhalil, Khalilen
dc.contributor.authorBahrami, Hamid Rezaen
dc.contributor.authorAl-Naffouri, Tareq Y.en
dc.date.accessioned2016-01-19T13:23:37Zen
dc.date.available2016-01-19T13:23:37Zen
dc.date.issued2015-08en
dc.identifier.citationEltayeb ME, Elkhalil K, Bahrami HR, Al-Naffouri TY (2015) Opportunistic Relay Selection With Limited Feedback. IEEE Trans Commun 63: 2885–2898. Available: http://dx.doi.org/10.1109/tcomm.2015.2451629.en
dc.identifier.issn0090-6778en
dc.identifier.doi10.1109/tcomm.2015.2451629en
dc.identifier.urihttp://hdl.handle.net/10754/594196en
dc.description.abstractRelay selection is a simple technique that achieves spatial diversity in cooperative relay networks. Generally, relay selection algorithms require channel state information (CSI) feedback from all cooperating relays to make a selection decision. This requirement poses two important challenges, which are often neglected in the literature. Firstly, the fed back channel information is usually corrupted by additive noise. Secondly, CSI feedback generates a great deal of feedback overhead (air-time) that could result in significant performance hits. In this paper, we propose a compressive sensing (CS) based relay selection algorithm that reduces the feedback overhead of relay networks under the assumption of noisy feedback channels. The proposed algorithm exploits CS to first obtain the identity of a set of relays with favorable channel conditions. Following that, the CSI of the identified relays is estimated using least squares estimation without any additional feedback. Both single and multiple relay selection cases are considered. After deriving closed-form expressions for the asymptotic end-to-end SNR at the destination and the feedback load for different relaying protocols, we show that CS-based selection drastically reduces the feedback load and achieves a rate close to that obtained by selection algorithms with dedicated error-free feedback. © 1972-2012 IEEE.en
dc.description.sponsorshipCRG3[ORS#2221]en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.subjectAmplify-and-Forwarden
dc.subjectCompressive Sensingen
dc.subjectDecode-and-Forwarden
dc.subjectFeedbacken
dc.subjectFull-Duplexen
dc.subjectHalf-Duplexen
dc.subjectRelayingen
dc.titleOpportunistic Relay Selection With Limited Feedbacken
dc.typeArticleen
dc.contributor.departmentElectrical Engineering Programen
dc.identifier.journalIEEE Transactions on Communicationsen
dc.contributor.institutionWireless Networking and Communications Group (WNCG), University of Texas at Austin, Austin, TX, United Statesen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Akron, Akron, OH, United Statesen
dc.contributor.institutionDepartment of Electrical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabiaen
kaust.authorElkhalil, Khalilen
kaust.authorAl-Naffouri, Tareq Y.en
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