A Performance Comparison of OFDM and Pulsed PHY Modulations in Optical Wireless Communications

In this paper, we experimentally compare orthogonal frequency-division multiplexing (OFDM) and on-off keying (OOK) modulation in the context of the IEEE 802.15.13-2023 standard at bandwidths up to 50 MHz across a Li-Fi link with distances up to 5 m and a lateral offset up to 51°. Error vector magnit...

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Bibliographic Details
Published in:	2023 South American Conference On Visible Light Communications (SACVLC) pp. 124 - 129
Main Authors:	Hinrichs, Malte, Costa, Wesley, Rocha, Helder, Pontes, Maria, Segatto, Marcelo, Paraskevopoulos, Anagnostis, Jungnickel, Volker, Freund, Ronald, Silva, Jair
Format:	Conference Proceeding
Language:	English
Published:	IEEE 08-11-2023
Subjects:	Adaptive optics Bit error rate IEEE 802.15 Standard OFDM Optical Wireless Communications Peak to average power ratio Pulsed Modulation Symbols Wireless communication
Online Access:	Get full text
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Summary:	In this paper, we experimentally compare orthogonal frequency-division multiplexing (OFDM) and on-off keying (OOK) modulation in the context of the IEEE 802.15.13-2023 standard at bandwidths up to 50 MHz across a Li-Fi link with distances up to 5 m and a lateral offset up to 51°. Error vector magnitude (EVM) and bit error rate (BER) evaluations confirm that the high peak-to-average power ratio (PAPR) of OFDM limits the achievable transmission distance, but it offers higher data rates due to its higher spectral efficiency. Due to the lower PAPR, OOK-based Pulsed Modulation PHY (PM-PHY) shows a significantly higher link range. As the structure of the PM-PHY is based on OFDM symbols, the two solutions may also be combined to open a wider range of use cases for optical wireless communications.
DOI:	10.1109/SACVLC59022.2023.10347540