Cognitive relaying and power allocation under channel state uncertainties

Handle URI:
http://hdl.handle.net/10754/564699
Title:
Cognitive relaying and power allocation under channel state uncertainties
Authors:
Pandarakkottilil, Ubaidulla; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 ) ; Aïssa, Sonia
Abstract:
In this paper, we present robust joint relay precoder designs and transceiver power allocations for a cognitive radio network under imperfect channel state information (CSI). The secondary (or cognitive) network consists of a pair of single-antenna transceiver nodes and a non-regenerative two-way relay with multiple antennas which aids the communication process between the transceiver pair. The secondary nodes share the spectrum with a licensed primary user (PU) while guaranteeing that the interference to the PU receiver is maintained below a specified threshold. We consider two robust designs: the first is based on the minimization of the total transmit power of the secondary relay node required to provide the minimum quality of service, measured in terms of mean-square error (MSE) of the transceiver nodes, and the second is based on the minimization of the sum-MSE of the transceiver nodes. The robust designs are based on worst-case optimization and take into account known parameters of the error in the CSI to render the performance immune to the presence of errors in the CSI. Though the original problem is non-convex, we show that the proposed designs can be reformulated as tractable convex optimization problems that can be solved efficiently. We illustrate the performance of the proposed designs through some selected numerical simulations. © 2013 IEEE.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division; Electrical Engineering Program; Communication Theory Lab
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2013 IEEE Wireless Communications and Networking Conference (WCNC)
Conference/Event name:
2013 IEEE Wireless Communications and Networking Conference, WCNC 2013
Issue Date:
Apr-2013
DOI:
10.1109/WCNC.2013.6555102
Type:
Conference Paper
ISSN:
15253511
ISBN:
9781467359399
Appears in Collections:
Conference Papers; Electrical Engineering Program; Communication Theory Lab; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorPandarakkottilil, Ubaidullaen
dc.contributor.authorAlouini, Mohamed-Slimen
dc.contributor.authorAïssa, Soniaen
dc.date.accessioned2015-08-04T07:12:57Zen
dc.date.available2015-08-04T07:12:57Zen
dc.date.issued2013-04en
dc.identifier.isbn9781467359399en
dc.identifier.issn15253511en
dc.identifier.doi10.1109/WCNC.2013.6555102en
dc.identifier.urihttp://hdl.handle.net/10754/564699en
dc.description.abstractIn this paper, we present robust joint relay precoder designs and transceiver power allocations for a cognitive radio network under imperfect channel state information (CSI). The secondary (or cognitive) network consists of a pair of single-antenna transceiver nodes and a non-regenerative two-way relay with multiple antennas which aids the communication process between the transceiver pair. The secondary nodes share the spectrum with a licensed primary user (PU) while guaranteeing that the interference to the PU receiver is maintained below a specified threshold. We consider two robust designs: the first is based on the minimization of the total transmit power of the secondary relay node required to provide the minimum quality of service, measured in terms of mean-square error (MSE) of the transceiver nodes, and the second is based on the minimization of the sum-MSE of the transceiver nodes. The robust designs are based on worst-case optimization and take into account known parameters of the error in the CSI to render the performance immune to the presence of errors in the CSI. Though the original problem is non-convex, we show that the proposed designs can be reformulated as tractable convex optimization problems that can be solved efficiently. We illustrate the performance of the proposed designs through some selected numerical simulations. © 2013 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.titleCognitive relaying and power allocation under channel state uncertaintiesen
dc.typeConference Paperen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.contributor.departmentElectrical Engineering Programen
dc.contributor.departmentCommunication Theory Laben
dc.identifier.journal2013 IEEE Wireless Communications and Networking Conference (WCNC)en
dc.conference.date7 April 2013 through 10 April 2013en
dc.conference.name2013 IEEE Wireless Communications and Networking Conference, WCNC 2013en
dc.conference.locationShanghaien
dc.contributor.institutionInstitut National de la Recherche Scientifique (INRS), University of Quebec, Montreal, QC, Canadaen
kaust.authorPandarakkottilil, Ubaidullaen
kaust.authorAlouini, Mohamed-Slimen
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