UNIPOLAR-PULSE AMPLITUDE MODULATION FREQUENCY DIVISION MULTIPLEXING FOR VISIBLE LIGHT COMMUNICATION SYSTEMS
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Date
2020
Authors
Saied, Osama
Ghassemlooy, Zabih
Zvanovec, Stanislav
Kizilirmak, Refik Caglar
Lin, Bangjiang
Journal Title
Journal ISSN
Volume Title
Publisher
arxiv
Abstract
Asymmetrically clipped optical orthogonal frequency division multiplexing (ACO OFDM) has been proposed in visible light communication (VLC) systems to overcome the
dc-biased optical OFDM power consumption issue at the cost of the available electrical spectral
efficiency. Due to the implementation of inverse fast Fourier transform, all the optical OFDM
schemes including ACO-OFDM suffer from large peak-to-average power ratio (PAPR), which
degrades the performance in VLC systems as the light-emitting diodes used as the transmitter
have a limited optical power-current linear range. To address the PAPR issue in ACO-OFDM, we
introduce a unipolar-pulse amplitude modulation frequency division multiplexing by adopting
the single carrier frequency division multiple access (SC-FDMA). This is achieved by consid ering a PAM as an SC-FDMA data symbol and inserting a conjugate copy of the middle and first
SC-FDMA FFT output subcarriers after the middle and last subcarriers, respectively. Simulation
results show that, for the proposed scheme, the PAPR is 3.6 dB lower compared with ACO OFDM. The PAPR improvement is further analyzed with the simulation results demonstrating
that the proposed scheme offers 2.5 dB more average transmitted power compared to ACO OFDM
Description
Keywords
Type of access: Open Access, single carrier frequency division multiple access, asymmetrically clipped optical orthogonal frequency division multiplexing, peak-to-average power ratio, light-emitting diode, dynamic range
Citation
Saied, O., Ghassemlooy, Z., Zvanovec, S., Kizilirmak, R. C., & Lin, B. (2020). Unipolar-pulse amplitude modulation frequency division multiplexing for visible light communication systems. Optical Engineering, 59(09). https://doi.org/10.1117/1.oe.59.9.096108