A Demonstration of Frequency-Shift Keying in Underwater Optical Wireless Communications

Guler, Egecan; Geldard, Callum T.; Baldwin, Amy; Popoola, Wasiu O.

doi:10.1364/cleo_at.2022.jw3b.104

Cited by 3 publications

(2 citation statements)

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“…In addition, it offers resilience against fluctuations in amplitude or phase due to the channel and therefore used for the high priority data. In [18], [44], we have shown the resilience of SIM with FSK against underwater turbulence. In addition to this resilience, the FSK-SIM implementation is simple but it suffers from low spectral efficiency.…”

Section: A Subcarrier Intensity Modulationmentioning

confidence: 96%

“…FSK was additionally analysed and presented as a suitable modulation scheme for VLC systems to achieve high energy efficiency in [17]. In our previous work in [18], we demonstrated the resilience of FSK implemented using SIM in a turbulent UOWC channel. In [21], a VLC system using quadrature amplitude modulation (QAM) with OFDM scheme was improved with the use of probabilistic shaping and wavelength division multiplexing (WDM) to demonstrate a transmission rate of 10.8 Gbps.…”

Section: Introductionmentioning

confidence: 99%

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3-D-Hierarchical Signalling for Resilient Optical Wireless Communication Systems

Guler,

Geldard,

Butler

et al. 2023

IEEE Open J. Commun. Soc.

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This paper presents a 3 dimensional (3D)-hierarchical modulation technique for optical wireless communication (OWC) systems in which high, medium and low priority data are encoded on the frequency, phase and amplitude of a subcarrier signal, respectively. The error performance of the 3Dhierarchical modulation is derived and evaluated under different channel conditions. A proof-of-concept experiment is then presented to demonstrate the feasibility of this approach. The results presented in this study show that encoding high and medium priority data on the frequency and phase of a subcarrier signal offers resilience against the deleterious effects of the OWC channel. The amplitude dimension of the subcarrier signal can then be utilised to further increase the system spectral efficiency if the channel conditions allow for it. INDEX TERMS Optical wireless communications (OWC), Underwater optical wireless communications (UOWC), Visible light communication (VLC), free-space optical communication, Modulation schemes, Signalling techniques for OWC

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Section: A Subcarrier Intensity Modulationmentioning

confidence: 96%