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PassiveLiFi: rethinking LiFi for low-power and long range RF backscatter

Published: 25 October 2021 Publication History

Abstract

Light bulbs have been recently explored to design Light Fidelity (LiFi) communication to battery-free tags, thus complementing Radiofrequency (RF) backscatter in the uplink. In this paper, we show that LiFi and RF backscatter are complementary and have unexplored interactions. We introduce PassiveLiFi, a battery-free system that uses LiFi to transmit RF backscatter at a meagre power budget. We address several challenges on the system design in the LiFi transmitter, the tag and the RF receiver. We design the first LiFi transmitter that implements a chirp spread spectrum (CSS) using the visible light spectrum. We use a small bank of solar cells for communication and harvesting and reconfigure them based on the amount of harvested energy and desired data rate. We further alleviate the low responsiveness of solar cells with a new low-power receiver design in the tag. Experimental results with an RF carrier of 17 dBm show that we can generate RF backscatter with a range of 80.3 meters/μW consumed in the tag, which is almost double with respect to prior work.

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cover image ACM Conferences
MobiCom '21: Proceedings of the 27th Annual International Conference on Mobile Computing and Networking
October 2021
887 pages
ISBN:9781450383424
DOI:10.1145/3447993
Permission to make digital or hard copies of all or part of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage and that copies bear this notice and the full citation on the first page. Copyrights for components of this work owned by others than ACM must be honored. Abstracting with credit is permitted. To copy otherwise, or republish, to post on servers or to redistribute to lists, requires prior specific permission and/or a fee. Request permissions from [email protected]

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Published: 25 October 2021

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  • European Union?s Horizon 2020 research and innovation programme under the Marie Sk?odowska Curie grant agreement ENLIGHTEM
  • Vinnova (Sweden Innovation Agency)
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Cited By

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  • (2024)RGB LED for Communication, Harvesting and Sensing in IoT ApplicationsACM Transactions on Sensor Networks10.1145/367516920:5(1-23)Online publication date: 27-Jun-2024
  • (2024)Processor-Sharing Internet of Things Architecture for Large-scale DeploymentProceedings of the 22nd ACM Conference on Embedded Networked Sensor Systems10.1145/3666025.3699333(211-224)Online publication date: 4-Nov-2024
  • (2024)Practical Optical Camera Communication Behind Unseen and Complex BackgroundsProceedings of the 22nd Annual International Conference on Mobile Systems, Applications and Services10.1145/3643832.3661866(113-126)Online publication date: 3-Jun-2024
  • (2024)Exploiting Fine-grained Dimming with Improved LiFi ThroughputACM Transactions on Sensor Networks10.1145/364381420:3(1-24)Online publication date: 13-Apr-2024
  • (2024)Sisyphus: Redefining Low Power for LoRa ReceiverProceedings of the 30th Annual International Conference on Mobile Computing and Networking10.1145/3636534.3690686(1177-1191)Online publication date: 4-Dec-2024
  • (2024)LiFi for Low-Power and Long-Range RF BackscatterIEEE/ACM Transactions on Networking10.1109/TNET.2023.334431632:3(2237-2252)Online publication date: Jun-2024
  • (2024)Sustainable and Low-Power Logic Inverter-Based Batteryless SLIPT Receiver for IoT Nodes2024 Joint European Conference on Networks and Communications & 6G Summit (EuCNC/6G Summit)10.1109/EuCNC/6GSummit60053.2024.10597101(1079-1083)Online publication date: 3-Jun-2024
  • (2023)Rethinking LiFi for Carbon Neutral Sunlight-based Communication2023 21st Mediterranean Communication and Computer Networking Conference (MedComNet)10.1109/MedComNet58619.2023.10168863(53-60)Online publication date: 13-Jun-2023
  • (2023)Toward Sustainable Greenhouses Using Battery-Free LiFi-Enabled Internet of ThingsIEEE Communications Magazine10.1109/MCOM.001.220048961:5(129-135)Online publication date: 1-May-2023
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