Optimisation of power allocation for asymmetric relay placement in multi-hop relay systems

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dc.contributor.authorDhaka, Kalpana
dc.contributor.authorMallik, Ranjan K.
dc.contributor.authorSchober, Robert
dc.date.accessioned2013-08-14T13:40:44Z
dc.date.available2013-08-14T13:40:44Z
dc.date.copyright2013
dc.date.issued2013-04
dc.description.abstractIn this study, schemes for optimisation of power allocation (OPA) for asymmetric relay placement are presented for multi-hop communication in a Rayleigh-fading environment. For a decode-and-forward (DF) multi-hop communication system, expressions are derived for optimised power allocation based on symbol error probability (SEP) and global channel state information (GCSI). The analysis for OPA based on GCSI is extended to a hybrid combination of amplify-and-forward (AF) and DF relays. Analysis is done for two kinds of modulation schemes: M-ary phase-shift keying with coherent detection and orthogonal M-ary frequency-shift keying with non-coherent detection. Simulation results show that for a multi-hop system with asymmetric relay placement, power optimisation schemes perform better than the conventional equal power allocation scheme. In addition, power optimisation based on GCSI shows substantially improved performance compared with power allocation based on end-to-end SEP. Further, performance comparison is shown for increase in number of relay nodes in an AF and DF multi-hop system with and without power allocation. The performance of a DF system improves with increase in number of relay nodes whereas performance of an AF system degrades. Hybrid relaying provides an option to exercise switching between DF and AF so as to extract the maximum advantage of the two relaying schemes.en
dc.formatTexten
dc.format.extent1 digital file (p. 128-136)en
dc.format.mimetypeApplication/pdf
dc.identifier.citationDhaka, K., Mallik, R.K., & Schober, R. (2013). Optimisation of power allocation for asymmetric relay placement in multi-hop relay systems. IET Communications, 7(2), 128-136.doi:10.1049/iet-com.2012.0407en
dc.identifier.issn1751-8628
dc.identifier.urihttp://hdl.handle.net/10625/51507
dc.language.isoen
dc.publisherInstitution of Engineering and Technologyen
dc.subjectPOWER ALLOCATIONen
dc.subjectMULTI-HOP COMMUNICATIONen
dc.subjectORTHOGONAL M-ARY FREQUENCY-SHIFT KEYING (OMFSK)en
dc.subjectDECODE-AND-FORWARD (DF) RELAYINGen
dc.subjectSYMBOL ERROR PROBABILITY (SEP)en
dc.subjectM-ARY PHASE-SHIFT KEYING (MPSK)en
dc.titleOptimisation of power allocation for asymmetric relay placement in multi-hop relay systemsen
dc.typeJournal Article (peer-reviewed)en
idrc.copyright.holderThe Institution of Engineering and Technology
idrc.dspace.accessOpen Accessen
idrc.noaccessDue to copyright restrictions the full text of this research output is not available in the IDRC Digital Library or by request from the IDRC Library. / Compte tenu des restrictions relatives au droit d'auteur, le texte intégral de cet extrant de recherche n'est pas accessible dans la Bibliothèque numérique du CRDI, et il n'est pas possible d'en faire la demande à la Bibliothéque du CRDI.en
idrc.project.componentnumber104519007
idrc.project.number104519
idrc.project.titleInternational Research Chairs Initiative (IRCI)en
idrc.recordsserver.bcsnumberIC01-3412-162
idrc.rims.adhocgroupIDRC SUPPORTEDen

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