- Title
- A novel OFDM format and a machine learning based dimming control for lifi
- Creator
- Nowrin, Itisha; Mondal, M.; Islam, Rashed; Kamruzzaman, Joarder
- Date
- 2021
- Type
- Text; Journal article
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/179730
- Identifier
- vital:15661
- Identifier
-
https://doi.org/10.3390/electronics10172103
- Identifier
- ISBN:2079-9292 (ISSN)
- Abstract
- This paper proposes a new hybrid orthogonal frequency division multiplexing (OFDM) form termed as DC‐biased pulse amplitude modulated optical OFDM (DPO‐OFDM) by combining the ideas of the existing DC‐biased optical OFDM (DCO‐OFDM) and pulse amplitude modulated discrete multitone (PAM‐DMT). The analysis indicates that the required DC‐bias for DPO‐OFDM-based light fidelity (LiFi) depends on the dimming level and the components of the DPO‐OFDM. The bit error rate (BER) performance and dimming flexibility of the DPO‐OFDM and existing OFDM schemes are evaluated using MATLAB tools. The results show that the proposed DPO‐OFDM is power efficient and has a wide dimming range. Furthermore, a switching algorithm is introduced for LiFi, where the individual components of the hybrid OFDM are switched according to a target dimming level. Next, machine learning algorithms are used for the first time to find the appropriate proportions of the hybrid OFDM components. It is shown that polynomial regression of degree 4 can reliably predict the constellation size of the DCO‐OFDM component of DPO‐OFDM for a given constellation size of PAM‐DMT. With the component switching and the machine learning algorithms, DPO‐OFDM‐based LiFi is power efficient at a wide dimming range. © 2021 by the authors. Licensee MDPI, Basel, Switzerland.
- Publisher
- MDPI
- Relation
- Electronics (Switzerland) Vol. 10, no. 17 (2021), p.
- Rights
- All metadata describing materials held in, or linked to, the repository is freely available under a CC0 licence
- Rights
- https://creativecommons.org/licenses/by/4.0/
- Rights
- Copyright © 2021 by the authors. Licensee MDPI, Basel, Switzerland
- Rights
- Open Access
- Subject
- 0906 Electrical and Electronic Engineering; Dimming; Light fidelity; Machine learning; Orthogonal frequency division multiplexing; Regression
- Full Text
- Reviewed
- Funder
- The APC will be funded by the School of Engineering, IT and Physical Sciences, Federation University Australia.
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