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Effect of LED Radiation Pattern on BER Performance in Indoor Multipath MIMO-VLC System

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Abstract

The present paper investigates the impact of three radiation patterns of LED namely Lambertian, Batwing, Elliptical on the BER performance of 4 × 4 indoor multiple-input multiple-output (MIMO) visible light communication (VLC) system. The BER simulation has been done using LOS and LOS plus first reflection (L-R1) signals for ceiling-mounted and wall-mounted LEDs. For the case of ceiling-mounted LEDs, impulse response and BER have been computed using those radiation patterns at the centre and corner of a room (5 m × 5 m × 3 m). It has been found that LED having Elliptical radiation profile is more suitable for LOS signal when receiver is placed at the centre position whereas, Batwing radiation is suitable for L-R1 signal, both at the centre and corner positions. In the case of wall-mounted LEDs, impulse response and BER have been determined at the centre of the room using LOS and L-R1 signals. The results show that Batwing has least BER using LOS signal due to its wide radiation beam, but for L-R1 signal, the Elliptical profile having its narrow radiation beam has provided better BER performance. The present study shows that the BER in MIMO-VLC system not only depends on the transmitter and receiver position but also on the radiation patterns of LED and higher order reflection signals.

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Acknowledgements

This research work is financially supported by the University Grant Commission (Ministry of Human Resource Development), Grant/Award number: F.15-9(JUNE)/2015(NET).

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  1. Department of Electronics and Communication Engineering, Birla Institute of Technology, Mesra, Ranchi, Jharkhand, 835215, India

    Ajit Kumar & S. K. Ghorai

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  1. Ajit Kumar
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  2. S. K. Ghorai
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Correspondence to Ajit Kumar.

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Kumar, A., Ghorai, S.K. Effect of LED Radiation Pattern on BER Performance in Indoor Multipath MIMO-VLC System. Wireless Pers Commun 113, 2009–2026 (2020). https://doi.org/10.1007/s11277-020-07305-2

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