TY - JOUR
T1 - Unipolar-pulse amplitude modulation frequency division multiplexing for visible light communication systems
AU - Saied, Osama
AU - Ghassemlooy, Zabih
AU - Zvanovec, Stanislav
AU - Kizilirmak, Refik Caglar
AU - Lin, Bangjiang
N1 - Publisher Copyright:
© 2020 Society of Photo-Optical Instrumentation Engineers (SPIE).
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/9/29
Y1 - 2020/9/29
N2 - 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 considering 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.
AB - 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 considering 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.
KW - asymmetrically clipped optical orthogonal frequency division multiplexing
KW - dynamic range
KW - light-emitting diode
KW - peak-to-average power ratio
KW - single carrier frequency division multiple access
KW - visible light communication
KW - Augmented reality
KW - wearable computing
UR - http://www.scopus.com/inward/record.url?scp=85092379697&partnerID=8YFLogxK
U2 - 10.1117/1.OE.59.9.096108
DO - 10.1117/1.OE.59.9.096108
M3 - Article
AN - SCOPUS:85092379697
SN - 0091-3286
VL - 59
JO - Optical Engineering
JF - Optical Engineering
IS - 9
M1 - 096108
ER -