Low-SNR Capacity of Parallel IM-DD Optical Wireless Channels

Handle URI:
http://hdl.handle.net/10754/621899
Title:
Low-SNR Capacity of Parallel IM-DD Optical Wireless Channels
Authors:
Chaaban, Anas ( 0000-0002-8713-5084 ) ; Rezki, Zouheir; Alouini, Mohamed-Slim ( 0000-0003-4827-1793 )
Abstract:
The capacity of parallel intensity-modulation and direct-detection (IM-DD) optical wireless channels with total average intensity and per-channel peak intensity constraints is studied. The optimal intensity allocation at low signal-to-noise ratio (SNR) is derived, leading to the capacity-achieving onoff keying (OOK) distribution. Interestingly, while activating the strongest channel is optimal if (i) the peak intensity is fixed, this is not the case if (ii) the peak intensity is proportional to the average intensity. The minimum average optical intensity per bit is also studied, and is characterized for case (i) where it is achievable at low SNR. However, in case (ii), the average optical intensity per bit grows indefinitely as SNR decreases, indicating that lower optical intensity per bit can be achieved at moderate SNR than at low SNR.
KAUST Department:
Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Citation:
Chaaban A, Rezki Z, Alouini M-S (2016) Low-SNR Capacity of Parallel IM-DD Optical Wireless Channels. IEEE Communications Letters: 1–1. Available: http://dx.doi.org/10.1109/LCOMM.2016.2633339.
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Communications Letters
Issue Date:
29-Nov-2016
DOI:
10.1109/LCOMM.2016.2633339
Type:
Article
ISSN:
1089-7798
Sponsors:
This work was supported in part by the Qatar National Research Fund (a member of Qatar Foundation) under Grant NPRP 9-077-2-036. The statements made herein are solely the responsibility of the authors
Additional Links:
http://ieeexplore.ieee.org/document/7762033/
Appears in Collections:
Articles; Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorChaaban, Anasen
dc.contributor.authorRezki, Zouheiren
dc.contributor.authorAlouini, Mohamed-Slimen
dc.date.accessioned2016-11-30T08:43:10Z-
dc.date.available2016-11-30T08:43:10Z-
dc.date.issued2016-11-29en
dc.identifier.citationChaaban A, Rezki Z, Alouini M-S (2016) Low-SNR Capacity of Parallel IM-DD Optical Wireless Channels. IEEE Communications Letters: 1–1. Available: http://dx.doi.org/10.1109/LCOMM.2016.2633339.en
dc.identifier.issn1089-7798en
dc.identifier.doi10.1109/LCOMM.2016.2633339en
dc.identifier.urihttp://hdl.handle.net/10754/621899-
dc.description.abstractThe capacity of parallel intensity-modulation and direct-detection (IM-DD) optical wireless channels with total average intensity and per-channel peak intensity constraints is studied. The optimal intensity allocation at low signal-to-noise ratio (SNR) is derived, leading to the capacity-achieving onoff keying (OOK) distribution. Interestingly, while activating the strongest channel is optimal if (i) the peak intensity is fixed, this is not the case if (ii) the peak intensity is proportional to the average intensity. The minimum average optical intensity per bit is also studied, and is characterized for case (i) where it is achievable at low SNR. However, in case (ii), the average optical intensity per bit grows indefinitely as SNR decreases, indicating that lower optical intensity per bit can be achieved at moderate SNR than at low SNR.en
dc.description.sponsorshipThis work was supported in part by the Qatar National Research Fund (a member of Qatar Foundation) under Grant NPRP 9-077-2-036. The statements made herein are solely the responsibility of the authorsen
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.relation.urlhttp://ieeexplore.ieee.org/document/7762033/en
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.en
dc.subjectIntensity per biten
dc.subjectParallel IM-DD channelsen
dc.subjectCapacityen
dc.subjectIntensity allocationen
dc.titleLow-SNR Capacity of Parallel IM-DD Optical Wireless Channelsen
dc.typeArticleen
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Divisionen
dc.identifier.journalIEEE Communications Lettersen
dc.eprint.versionPost-printen
dc.contributor.institutionDepartment of Electrical and Computer Engineering, University of Idaho, Moscow, ID, USAen
kaust.authorChaaban, Anasen
kaust.authorRezki, Zouheiren
kaust.authorAlouini, Mohamed-Slimen
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