Full-Duplex Relay Selection in Cognitive Underlay Networks

Handle URI:
http://hdl.handle.net/10754/626498
Title:
Full-Duplex Relay Selection in Cognitive Underlay Networks
Authors:
Khafagy, Mohammad Galal ( 0000-0001-7578-9702 ) ; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 ) ; Aissa, Sonia
Abstract:
In this work, we analyze the performance of full-duplex relay selection (FDRS) in spectrum-sharing networks. Contrary to half-duplex relaying, full-duplex relaying (FDR) enables simultaneous listening/forwarding at the secondary relay(s), thereby allowing for a higher spectral efficiency. However, since the source and relay simultaneously transmit in FDR, their superimposed signal at the primary receiver should now satisfy the existing interference constraint, which can considerably limit the secondary network throughput. In this regard, relay selection can offer an adequate solution to boost the secondary throughput while satisfying the imposed interference limit. We first analyze the performance of opportunistic FDRS with residual self-interference (RSI) by deriving the exact cumulative distribution function of its end-to-end signal-to-interference-plus-noise ratio under Nakagami-m fading. We also evaluate the offered diversity gain of relay selection for different full-duplex cooperation schemes in the presence/absence of a direct source-destination link. When the adopted RSI link gain model is sublinear in the relay power, which agrees with recent research findings, we show that remarkable diversity gain can be recovered even in the presence of an interfering direct link. Second, we evaluate the end-to-end performance of FDRS with interference constraints due to the presence of a primary receiver. Finally, the presented exact theoretical findings are verified by numerical simulations.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Publisher:
arXiv
Issue Date:
30-Sep-2017
ARXIV:
arXiv:1710.00177
Type:
Preprint
Additional Links:
http://arxiv.org/abs/1710.00177v1; http://arxiv.org/pdf/1710.00177v1
Appears in Collections:
Other/General Submission; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorKhafagy, Mohammad Galalen
dc.contributor.authorAlouini, Mohamed-Slimen
dc.contributor.authorAissa, Soniaen
dc.date.accessioned2017-12-28T07:32:13Z-
dc.date.available2017-12-28T07:32:13Z-
dc.date.issued2017-09-30en
dc.identifier.urihttp://hdl.handle.net/10754/626498-
dc.description.abstractIn this work, we analyze the performance of full-duplex relay selection (FDRS) in spectrum-sharing networks. Contrary to half-duplex relaying, full-duplex relaying (FDR) enables simultaneous listening/forwarding at the secondary relay(s), thereby allowing for a higher spectral efficiency. However, since the source and relay simultaneously transmit in FDR, their superimposed signal at the primary receiver should now satisfy the existing interference constraint, which can considerably limit the secondary network throughput. In this regard, relay selection can offer an adequate solution to boost the secondary throughput while satisfying the imposed interference limit. We first analyze the performance of opportunistic FDRS with residual self-interference (RSI) by deriving the exact cumulative distribution function of its end-to-end signal-to-interference-plus-noise ratio under Nakagami-m fading. We also evaluate the offered diversity gain of relay selection for different full-duplex cooperation schemes in the presence/absence of a direct source-destination link. When the adopted RSI link gain model is sublinear in the relay power, which agrees with recent research findings, we show that remarkable diversity gain can be recovered even in the presence of an interfering direct link. Second, we evaluate the end-to-end performance of FDRS with interference constraints due to the presence of a primary receiver. Finally, the presented exact theoretical findings are verified by numerical simulations.en
dc.publisherarXiven
dc.relation.urlhttp://arxiv.org/abs/1710.00177v1en
dc.relation.urlhttp://arxiv.org/pdf/1710.00177v1en
dc.rightsArchived with thanks to arXiven
dc.titleFull-Duplex Relay Selection in Cognitive Underlay Networksen
dc.typePreprinten
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.eprint.versionPre-printen
dc.contributor.institutionComputer Science Department, College of Engineering, Qatar University, Doha, Qatar.en
dc.contributor.institutionInstitut National de la Recherche Scientifique (INRS), University of Quebec, Montreal, QC, H5A 1K6, Canadaen
dc.identifier.arxividarXiv:1710.00177en
kaust.authorKhafagy, Mohammad Galalen
kaust.authorAlouini, Mohamed-Slimen
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