Optical Camera Communications for IoT–Rolling-Shutter Based MIMO Scheme with Grouped LED Array Transmitter

Teli, Shivani Rajendra, Matus, Vicente, Zvanovec, Stanislav, Perez-Jimenez, Rafael, Vitek, Stanislav and Ghassemlooy, Zabih (2020) Optical Camera Communications for IoT–Rolling-Shutter Based MIMO Scheme with Grouped LED Array Transmitter. Sensors, 20 (12). p. 3361. ISSN 1424-8220

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Official URL: https://doi.org/10.3390/s20123361

Abstract

In optical camera communications (OCC), the provision of both flicker-free illumination and high data rates are challenging issues, which can be addressed by utilizing the rolling-shutter (RS) property of the image sensors as the receiver (Rx). In this paper, we propose an RS-based multiple-input multiple-output OCC scheme for the Internet of things (IoT) application. A simplified design of multi-channel transmitter (Tx) using a 7.2 × 7.2 cm2 small 8 × 8 distributed light emitting diode (LED) array, based on grouping of LEDs, is proposed for flicker-free transmission. We carry out an experimental investigation of the indoor OCC system by employing a Raspberry Pi camera as the Rx, with RS capturing mode. Despite the small area of the display, flicker-free communication links within the range of 20–100 cm are established with data throughput of 960 to 120 bps sufficient for IoT. A method to extend link spans up to 1.8 m and the data throughput to 13.44 kbps using different configurations of multi-channel Tx is provided. The peak signal-to-noise ratio of ~14 and 16 dB and the rate of successfully received bits of 99.4 and 81% are measured for the shutter speeds of 200 and 800 µs for a link span of 1 m, respectively.

Item Type: Article
Additional Information: Funding Information: Funding: This work was supported by the European Union’s Horizon 2020 Research and Innovation Programme, under the Marie Sklodowska-Curie grant agreement no 764461 (VisIoN). Funding Information: This work was supported by the European Union?s Horizon 2020 Research and Innovation Programme, under the Marie Sklodowska-Curie grant agreement no 764461 (VisIoN).
Uncontrolled Keywords: Internet of things, Light-emitting diodes, Multiple-input multiple-output, Optical camera communications, Rolling-shutter camera
Subjects: H600 Electronic and Electrical Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Rachel Branson
Date Deposited: 11 May 2021 09:59
Last Modified: 31 May 2021 14:38
URI: http://nrl.northumbria.ac.uk/id/eprint/46136

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