Distributed cognitive two-way relay beamformer designs under perfect and imperfect CSI

Handle URI:
http://hdl.handle.net/10754/564428
Title:
Distributed cognitive two-way relay beamformer designs under perfect and imperfect CSI
Authors:
Pandarakkottilil, Ubaidulla; Aissa, Sonia
Abstract:
In this paper, we present distributed two-way relay beamformer designs for a cognitive radio network (CRN) in which a pair of cognitive (or secondary) transceiver nodes communicate with each other assisted by a set of cognitive two-way relay nodes. 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. First, we consider relay beamformer designs assuming the availability of perfect channel state information (CSI). For this case, a mean-square error (MSE)-constrained beamformer that minimizes the total relay transmit power, and an MSE-balancing beamformer with a constraint on the total relay transmit power are proposed. Next, we consider relay beamformer designs assuming that the available CSI is imperfect. For this case too, we consider the same problems as those in the case of perfect CSI, and propose beamformer designs that are robust to the errors in the CSI. We show that the proposed designs can be reformulated as convex optimization problems that can be solved efficiently. Through numerical simulations, we illustrate the performance of the proposed designs. © 2011 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:
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications
Conference/Event name:
2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'11
Issue Date:
Sep-2011
DOI:
10.1109/PIMRC.2011.6140009
Type:
Conference Paper
ISBN:
9781457713484
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.accessioned2015-08-04T06:27:22Zen
dc.date.available2015-08-04T06:27:22Zen
dc.date.issued2011-09en
dc.identifier.isbn9781457713484en
dc.identifier.doi10.1109/PIMRC.2011.6140009en
dc.identifier.urihttp://hdl.handle.net/10754/564428en
dc.description.abstractIn this paper, we present distributed two-way relay beamformer designs for a cognitive radio network (CRN) in which a pair of cognitive (or secondary) transceiver nodes communicate with each other assisted by a set of cognitive two-way relay nodes. 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. First, we consider relay beamformer designs assuming the availability of perfect channel state information (CSI). For this case, a mean-square error (MSE)-constrained beamformer that minimizes the total relay transmit power, and an MSE-balancing beamformer with a constraint on the total relay transmit power are proposed. Next, we consider relay beamformer designs assuming that the available CSI is imperfect. For this case too, we consider the same problems as those in the case of perfect CSI, and propose beamformer designs that are robust to the errors in the CSI. We show that the proposed designs can be reformulated as convex optimization problems that can be solved efficiently. Through numerical simulations, we illustrate the performance of the proposed designs. © 2011 IEEE.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.titleDistributed cognitive two-way relay beamformer designs under perfect and imperfect CSIen
dc.typeConference Paperen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journal2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communicationsen
dc.conference.date11 September 2011 through 14 September 2011en
dc.conference.name2011 IEEE 22nd International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'11en
dc.conference.locationToronto, ONen
dc.contributor.institutionINRS, University of Quebec, Montreal, QC, Canadaen
kaust.authorPandarakkottilil, Ubaidullaen
kaust.authorAissa, Soniaen
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