Robust distributed cognitive relay beamforming

Handle URI:
http://hdl.handle.net/10754/564549
Title:
Robust distributed cognitive relay beamforming
Authors:
Pandarakkottilil, Ubaidulla; Aissa, Sonia
Abstract:
In this paper, we present a distributed relay beamformer design for a cognitive radio network in which a cognitive (or secondary) transmit node communicates with a secondary receive node assisted by a set of cognitive non-regenerative relays. The secondary nodes share the spectrum with a licensed primary user (PU) node, and each node is assumed to be equipped with a single transmit/receive antenna. The interference to the PU resulting from the transmission from the cognitive nodes is kept below a specified limit. The proposed robust cognitive relay beamformer design seeks to minimize the total relay transmit power while ensuring that the transceiver signal-to-interference- plus-noise ratio and PU interference constraints are satisfied. The proposed design takes into account a parameter of the error in the channel state information (CSI) to render the performance of the beamformer robust in the presence of imperfect CSI. Though the original problem is non-convex, we show that the proposed design can be reformulated as a tractable convex optimization problem that can be solved efficiently. Numerical results are provided and illustrate the performance of the proposed designs for different network operating conditions and parameters. © 2012 IEEE.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
2012 IEEE 75th Vehicular Technology Conference (VTC Spring)
Conference/Event name:
IEEE 75th Vehicular Technology Conference, VTC Spring 2012
Issue Date:
May-2012
DOI:
10.1109/VETECS.2012.6239948
Type:
Conference Paper
ISSN:
15502252
ISBN:
9781467309905
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorPandarakkottilil, Ubaidullaen
dc.contributor.authorAissa, Soniaen
dc.date.accessioned2015-08-04T07:03:45Zen
dc.date.available2015-08-04T07:03:45Zen
dc.date.issued2012-05en
dc.identifier.isbn9781467309905en
dc.identifier.issn15502252en
dc.identifier.doi10.1109/VETECS.2012.6239948en
dc.identifier.urihttp://hdl.handle.net/10754/564549en
dc.description.abstractIn this paper, we present a distributed relay beamformer design for a cognitive radio network in which a cognitive (or secondary) transmit node communicates with a secondary receive node assisted by a set of cognitive non-regenerative relays. The secondary nodes share the spectrum with a licensed primary user (PU) node, and each node is assumed to be equipped with a single transmit/receive antenna. The interference to the PU resulting from the transmission from the cognitive nodes is kept below a specified limit. The proposed robust cognitive relay beamformer design seeks to minimize the total relay transmit power while ensuring that the transceiver signal-to-interference- plus-noise ratio and PU interference constraints are satisfied. The proposed design takes into account a parameter of the error in the channel state information (CSI) to render the performance of the beamformer robust in the presence of imperfect CSI. Though the original problem is non-convex, we show that the proposed design can be reformulated as a tractable convex optimization problem that can be solved efficiently. Numerical results are provided and illustrate the performance of the proposed designs for different network operating conditions and parameters. © 2012 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.titleRobust distributed cognitive relay beamformingen
dc.typeConference Paperen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journal2012 IEEE 75th Vehicular Technology Conference (VTC Spring)en
dc.conference.date6 May 2012 through 9 June 2012en
dc.conference.nameIEEE 75th Vehicular Technology Conference, VTC Spring 2012en
dc.conference.locationYokohamaen
dc.contributor.institutionINRS, University of Quebec, Montreal, QC, Canadaen
kaust.authorPandarakkottilil, Ubaidullaen
kaust.authorAissa, Soniaen
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