DFT spread-optical pulse amplitude modulation for visible light communication systems

Saied, Osama, Li, Xingwang and Rabie, Khaled M ORCID: https://orcid.org/0000-0002-9784-3703 (2022) DFT spread-optical pulse amplitude modulation for visible light communication systems. IEEE Access, 10. pp. 15956-15967. ISSN 2169-3536

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Official URL: https://doi.org/10.1109/ACCESS.2022.3147209

Abstract

DC-biased optical orthogonal frequency division multiplexing (DCO-OFDM) has been proposed in visible light communication (VLC) to overcome the limited modulation bandwidth of light emitting diode (LED). Due to the implementation of the inverse fast Fourier transform at the DCO-OFDM transmitter, DCO-OFDM suffers from its high peak-to-average power ratio (PAPR), which restricts its use in some VLC applications, especially where the optical power efficiency is a crucial requirement. That is because the LEDs used in VLC systems have a limited optical power-current linear range. To this end, a novel discrete Fourier transform spread-optical pulse amplitude modulation (DFTS-OPAM) signal scheme based on the single carrier-interleaved frequency division multiple access (SC-IFDMA) signal is introduced in this paper to address the high PAPR issue of OFDM. DFTS-OPAM is achieved by considering a PAM as an SC-IFDMA data symbol and duplicate the output vector of the fast Fourier transform at the SC-IFDMA transmitter side. Simulation results show that the PAPR of the proposed scheme is 7 dB lower than that of DCO-OFDM. Furthermore, this significant PAPR improvement is experimentally investigated where the practical results show that the proposed scheme can provide more 2.5 dB reduction in the average transmitted power requirement compared to DCO-OFDM and can subsequently increase the maximum achieved distance between the transmitter and the receiver up to 44%.

Item Type:	Article (Article)
Peer-reviewed:	Yes
Date Deposited:	01 Nov 2023 16:29
Publisher:	IEEE
Additional Information:	This is an open access article which originally appeared in IEEE Access
Divisions:	Faculties > Science and Engineering
Subject terms:	Science & Technology, Technology, Computer Science, Information Systems, Engineering, Electrical & Electronic, Telecommunications, Computer Science, Engineering, Peak to average power ratio, Visible light communication, Optical transmitters, Light emitting diodes, Optical pulses, Optical modulation, Modulation, Single carrier frequency division multiple access, DC-biased optical orthogonal frequency division multiplexing, visible light communication, peak-to-average power ratio, light-emitting diode, dynamic range, PERFORMANCE, TIME, 08 Information and Computing Sciences, 09 Engineering, 10 Technology
URI:	https://e-space.mmu.ac.uk/id/eprint/632930
DOI:	https://doi.org/10.1109/ACCESS.2022.3147209
ISSN	2169-3536
e-ISSN	2169-3536

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