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dc.contributor.authorChaaban, Anas
dc.contributor.authorRezki, Zouheir
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2016-10-31T07:37:27Z
dc.date.available2016-10-31T07:37:27Z
dc.date.issued2016-10-26
dc.identifier.citationChaaban A, Rezki Z, Alouini M-S (2016) Fundamental Limits of Parallel Optical Wireless Channels: Capacity Results and Outage Formulation. IEEE Transactions on Communications: 1–1. Available: http://dx.doi.org/10.1109/TCOMM.2016.2621743.
dc.identifier.issn0090-6778
dc.identifier.doi10.1109/TCOMM.2016.2621743
dc.identifier.urihttp://hdl.handle.net/10754/621258
dc.description.abstractMulti-channel (MC) optical wireless communication (OWC) systems employing wave-division multiplexing for outdoors free-space optical communications, or multi-user timedivision multiple access for indoors visible-light communications, e.g., can be modeled as parallel channels. Multi-input multioutput OWC systems can also be transformed, possibly with some performance loss, to parallel channels using pre-/postcoding. Studying the performance of such MC-OWC systems requires characterizing the capacity of the underlying parallel channels. In this paper, upper and lower bounds on the capacity of constant parallel OWC channels with a total average intensity constraint are derived. Then, the paper focuses on finding intensity allocations that maximize the lower bounds given channel-state information at the transmitter (CSIT). Due to its nonconvexity, the KKT conditions are used to describe a list of candidate allocations. Instead searching exhaustively for the best solution, low-complexity near-optimal algorithms are proposed. The resulting optimized lower bound nearly coincides with capacity at high signal-to-noise ratio (SNR). Under a quasi-static channel model and in the absence of CSIT, outage probability upper and lower bounds are derived. Those bounds also meet at high SNR, thus characterizing the outage capacity in this regime. Finally, the results are extended to a system with both average and peak intensity constraints.
dc.description.sponsorshipQatar National Research Fund[NPRP 9-077-2-036]
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttp://ieeexplore.ieee.org/document/7707381/
dc.rights(c) 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users including reprinting/ republishing this material for advertising or promotional purposes creating new collective works for resale or redistribution to servers or lists or reuse of any copyrighted components of this work in other works.
dc.subjectoutage probability
dc.subjectOptical wireless
dc.subjectintensity-modulation
dc.subjectparallel channels
dc.subjectintensity allocation
dc.subjectcapacity bounds
dc.titleFundamental Limits of Parallel Optical Wireless Channels: Capacity Results and Outage Formulation
dc.typeArticle
dc.contributor.departmentCommunication Theory Lab
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.identifier.journalIEEE Transactions on Communications
dc.eprint.versionPost-print
kaust.personChaaban, Anas
kaust.personRezki, Zouheir
kaust.personAlouini, Mohamed-Slim
refterms.dateFOA2018-06-13T12:58:07Z
dc.date.published-online2016-10-26
dc.date.published-print2016


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