Optimum device and modulation scheme selection for optical wireless communications

Chun, Hyunchae and Rajbhandari, Sujan and Faulkner, Graheme and Xie, Enyuan and McKendry, Jonathan J. D. and Gu, Erdan and Dawson, Martin D. and O'Brien, Dominic (2021) Optimum device and modulation scheme selection for optical wireless communications. Journal of Lightwave Technology, 39 (8). pp. 2281-2287. ISSN 0733-8724 (https://doi.org/10.1109/JLT.2021.3051379)

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Abstract

There has been an extensive modelling of the optical wireless channel, and the optimum modulation scheme for a particular channel is well-understood. However, this modelling has not taken into account the trade-offs that transmitter and receiver selection usually involve. For a particular type of transmitter, the modulation bandwidth and available power are closely related, as are receiver bandwidth, active area and sensitivity. In this article, we present a design approach that takes this device selection into account. The article details a general design method for an optical wireless communication system using a holistic design approach (i.e., considering channel, modulation schemes, and device constraints). The article shows results for particular examples, showing a substantial increase in margin (or data-rate) is available using this approach. For instance, by using this approach mutually optimising both modulation schemes and device constraints, it is found that for an optimally chosen Gallium Nitride micro-LED and a commercial photo receiver pair, a 20 dB SNR margin (or ∼3 times data-rate improvement) can be obtained compared with a more typical approach mainly concerning the modulation scheme optimisation.

  • Item type:Article
    ID code:75346
    Dates:
    Date
    Event
    15 April 2021
    Published
    13 January 2021
    Published Online
    10 December 2020
    Accepted
    22 July 2020
    Submitted
    Notes:© 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, 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 component of this work in other works.
    Subjects:Technology > Electrical engineering. Electronics Nuclear engineering
    Science > Physics
    Department:Faculty of Science > Physics > Institute of Photonics
    Depositing user: Pure Administrator
    Date deposited:11 Feb 2021 10:35
    Last modified:22 Apr 2024 00:45
    URI:https://strathprints.strath.ac.uk/id/eprint/75346
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