Enhanced Light Communications (ELC) for Underwater LiFi Systems: Prototype Performance Overview
"This document presents the performance evaluation of Enhanced Light Communications (ELC) technology for underwater LiFi systems. Various prototypes were developed and tested, showcasing data rates exceeding 1 Gbps and transmission distances over 100m in both freshwater and saltwater environments. The flexibility of the system allows for adaptation to different conditions, making it suitable for a wide range of applications."
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January 2025 doc.: IEEE 802.11-25/0175r1 Enhanced Light Communications (ELC) Underwater Prototype Performance Date: 2025-01-13 Authors: Name Stefan Videv Affiliations Kyocera SLD Laser Address Phone email svidev@kyocera-sldlaser.com Sovan Das Kyocera SLD Laser sdas@kyocera-sldlaser.com Kathleen Hartnett Kyocera SLD Laser khartnett@kyocera-sldlaser.com Submission Slide 1 Stefan Videv, Kyocera SLD Laser
January 2025 doc.: IEEE 802.11-25/0175r1 Prototype Development We have developed several underwater LiFi prototypes. A high-level look at the different systems we have tested can be summarized as: PAM based prototype with maximum capability of 2 Gbps (UL + DL) OFDM based prototype (g.hn) with maximum capability of 2 Gbps (UL+DL) OFDM based prototype with maximum capability of 4 Gbps (UL+DL) Submission Slide 2 Stefan Videv, Kyocera SLD Laser
January 2025 doc.: IEEE 802.11-25/0175r1 Prototype Performance PAM LiFi system testing at 21m freshwater pool: 4 mirrors used to extend pool range to 105m achieved 0.7 Gbps raw throughput over 105m translates to 0.521 Gbps of user data rate using TCP/IP Submission Slide 3 Stefan Videv, Kyocera SLD Laser
January 2025 doc.: IEEE 802.11-25/0175r1 Prototype Performance Downlink LiFi transceiver interface to air + through water surface OFDM LiFi system testing at short range 1.5 m distance in freshwater and saltwater: 1 Gbps downlink Uplink: 1 Gbps Downlink: 1 Gbps Photonics West demo fixture: 1.5m water column in acrylic tube Uplink LiFi transceiver interface to window through water surface 1 Gbps uplink Submission Slide 4 Stefan Videv, Kyocera SLD Laser
January 2025 doc.: IEEE 802.11-25/0175r1 Prototype Performance Submission Slide 5 Stefan Videv, Kyocera SLD Laser
January 2025 doc.: IEEE 802.11-25/0175r1 Prototype Performance Demonstration of 4 Gbps capable (theoretically) OFDM LiFi system at CES 2025 1.5 m through freshwater. Peak raw throughput achieved is 1968 Mbps. Peak user throughput achieved is 1680 Mbps. Submission Slide 6 Stefan Videv, Kyocera SLD Laser
January 2025 doc.: IEEE 802.11-25/0175r1 Summary LiFi has been demonstrated as a feasible option for underwater communication. It has been demonstrated that > 1 Gbps data rates are feasible. It has been demonstrated that distances of >100m are also achievable. System is flexible such that it can be reconfigured to best suit the environment for example freshwater vs saltwater. This combination of capability should be applicable to a wide variety of end-user applications. Submission Slide 7 Stefan Videv, Kyocera SLD Laser
