Data Rate Enhancement in Optical Camera Communications using an Artificial Neural Network Equaliser

Younus, Othman, Hassan, Navid Bani, Ghassemlooy, Zabih, Haigh, Paul Anthony, Zvanovec, Stanislav, Alves, Luis Nero and Le Minh, Hoa (2020) Data Rate Enhancement in Optical Camera Communications using an Artificial Neural Network Equaliser. IEEE Access, 8. pp. 42656-42665. ISSN 2169-3536

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Official URL: https://doi.org/10.1109/access.2020.2976537

Abstract

In optical camera communication (OCC) systems leverage on the use of commercial off-the-shelf image sensors to perceive the spatial and temporal variation of light intensity to enable data transmission. However, the transmission data rate is mainly limited by the exposure time and the frame rate of the camera. In addition, the camera’s sampling will introduce intersymbol interference (ISI), which will degrade the system performance. In this paper, an artificial neural network (ANN)-based equaliser with the adaptive algorithm is employed for the first time in the field of OCC to mitigate ISI and therefore increase the data rate. Unlike other communication systems, training of the ANN network in OCC is done only once in a lifetime for a range of different exposure time and the network can be stored with a look-up table. The proposed system is theoretically investigated and experimentally evaluated. The results record the highest bit rate for OCC using a single LED source and the Manchester line code (MLC) non-return to zero (NRZ) encoded signal. It also demonstrates 2 to 9 times improved bandwidth depending on the exposure times where the system’s bit error rate is below the forward error correction limit.

Item Type: Article
Subjects: F300 Physics
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mathematics, Physics and Electrical Engineering
Depositing User: Elena Carlaw
Date Deposited: 04 Mar 2020 17:34
Last Modified: 12 Mar 2020 10:30
URI: http://nrl.northumbria.ac.uk/id/eprint/42369

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