Achievable Rate of Multi-relay Cognitive Radio MIMO Channel with Space Alignment

Handle URI:
http://hdl.handle.net/10754/580027
Title:
Achievable Rate of Multi-relay Cognitive Radio MIMO Channel with Space Alignment
Authors:
Sboui, Lokman ( 0000-0003-1134-4055 ) ; Ghazzai, Hakim ( 0000-0002-8636-4264 ) ; Rezki, Zouheir; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 )
Abstract:
We study the impact of multiple relays on the primary user (PU) and secondary user (SU) rates of underlay MIMO cognitive radio. Both users exploit amplify-and-forward relays to communicate with the destination. A space alignment technique and a special linear precoding and decoding scheme are applied to allow the SU to use the resulting free eigenmodes. In addition, the SU can communicate over the used eigenmodes under the condition of respecting an interference constraint tolerated by the PU. At the destination, a successive interference cancellation (SIC) is performed to estimate the secondary signal. We present the explicit expressions of the optimal PU and SU powers that maximize their achievable rates. In the numerical results, we show that our scheme provides cognitive rate gain even in absence of tolerated interference. In addition, we show that increasing the number of relays enhances the PU and SU rates at low power regime and/or when the relays power is sufficiently high.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Sboui, Lokman, Hakim Ghazzai, Zouheir Rezki, and Mohamed-Slim Alouini. "Achievable Rate of Multi-relay Cognitive Radio MIMO Channel with Space Alignment." In Cognitive Radio Oriented Wireless Networks, pp. 17-29. Springer International Publishing, 2015.
Publisher:
Springer Science + Business Media
Journal:
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering
Conference/Event name:
10th International Conference on Cognitive Radio Oriented Wireless Networks, CROWNCOM 2015
Issue Date:
21-Apr-2015
DOI:
10.1007/978-3-319-24540-9_2
Type:
Conference Paper
ISSN:
1867-8211
Additional Links:
http://link.springer.com/chapter/10.1007%2F978-3-319-24540-9_2
Appears in Collections:
Conference Papers; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorSboui, Lokmanen
dc.contributor.authorGhazzai, Hakimen
dc.contributor.authorRezki, Zouheiren
dc.contributor.authorAlouini, Mohamed-Slimen
dc.date.accessioned2015-10-21T08:57:08Zen
dc.date.available2015-10-21T08:57:08Zen
dc.date.issued2015-04-21en
dc.identifier.citationSboui, Lokman, Hakim Ghazzai, Zouheir Rezki, and Mohamed-Slim Alouini. "Achievable Rate of Multi-relay Cognitive Radio MIMO Channel with Space Alignment." In Cognitive Radio Oriented Wireless Networks, pp. 17-29. Springer International Publishing, 2015.en
dc.identifier.issn1867-8211en
dc.identifier.doi10.1007/978-3-319-24540-9_2en
dc.identifier.urihttp://hdl.handle.net/10754/580027en
dc.description.abstractWe study the impact of multiple relays on the primary user (PU) and secondary user (SU) rates of underlay MIMO cognitive radio. Both users exploit amplify-and-forward relays to communicate with the destination. A space alignment technique and a special linear precoding and decoding scheme are applied to allow the SU to use the resulting free eigenmodes. In addition, the SU can communicate over the used eigenmodes under the condition of respecting an interference constraint tolerated by the PU. At the destination, a successive interference cancellation (SIC) is performed to estimate the secondary signal. We present the explicit expressions of the optimal PU and SU powers that maximize their achievable rates. In the numerical results, we show that our scheme provides cognitive rate gain even in absence of tolerated interference. In addition, we show that increasing the number of relays enhances the PU and SU rates at low power regime and/or when the relays power is sufficiently high.en
dc.language.isoenen
dc.publisherSpringer Science + Business Mediaen
dc.relation.urlhttp://link.springer.com/chapter/10.1007%2F978-3-319-24540-9_2en
dc.rightsThe final publication is available at Springer via http://dx.doi.org/10.1007/978-3-319-24540-9_2en
dc.subjectUnderlay cognitive radioen
dc.subjectMIMO space alignmenten
dc.subjectAmplify-and-forward multiple-relayen
dc.titleAchievable Rate of Multi-relay Cognitive Radio MIMO Channel with Space Alignmenten
dc.typeConference Paperen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalLecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineeringen
dc.conference.date2015-04-21 to 2015-04-23en
dc.conference.name10th International Conference on Cognitive Radio Oriented Wireless Networks, CROWNCOM 2015en
dc.conference.locationDoha, QATen
dc.eprint.versionPost-printen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorSboui, Lokmanen
kaust.authorGhazzai, Hakimen
kaust.authorRezki, Zouheiren
kaust.authorAlouini, Mohamed-Slimen
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