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dc.contributor.authorEltayeb, Mohammed E.
dc.contributor.authorElkhalil, Khalil
dc.contributor.authorBahrami, Hamid Reza
dc.contributor.authorAl-Naffouri, Tareq Y.
dc.date.accessioned2016-01-19T13:23:37Z
dc.date.available2016-01-19T13:23:37Z
dc.date.issued2015-08
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.
dc.identifier.issn0090-6778
dc.identifier.doi10.1109/tcomm.2015.2451629
dc.identifier.urihttp://hdl.handle.net/10754/594196
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.
dc.description.sponsorshipCRG3[ORS#2221]
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.subjectAmplify-and-Forward
dc.subjectCompressive Sensing
dc.subjectDecode-and-Forward
dc.subjectFeedback
dc.subjectFull-Duplex
dc.subjectHalf-Duplex
dc.subjectRelaying
dc.titleOpportunistic Relay Selection With Limited Feedback
dc.typeArticle
dc.contributor.departmentElectrical Engineering Program
dc.identifier.journalIEEE Transactions on Communications
dc.contributor.institutionWireless Networking and Communications Group (WNCG), University of Texas at Austin, Austin, TX, United States
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Akron, Akron, OH, United States
dc.contributor.institutionDepartment of Electrical Engineering, King Fahd University of Petroleum and Minerals, Dhahran, Saudi Arabia
kaust.personElkhalil, Khalil
kaust.personAl-Naffouri, Tareq Y.


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