Modeling and analysis of transmitter performance in visible light communications

X. Deng, Kumar Arulandu, Y. Wu, S. Mardanikorani, G. Zhou (Corresponding author), J.P.M.G. Linnartz

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3 Citations (Scopus)
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Abstract

This work addresses the power penalty in a Visible Light Communication (VLC) emitter that re-uses illumination Light Emitting Diodes (LEDs) for high-speed communications. We quantify the effect of modulation depth for two widely explored modulation schemes in VLC, namely Orthogonal Frequency Division Multiplexing (OFDM) and Pulse Amplitude Modulation (PAM). Extra power is dissipated in the LED and in the modulator due to such modulation. Two popular highspeed VLC transmitter topologies, namely a Bias Tee (Bias-T) and a Serial FET (Serial-F), are compared in terms of efficiency, Extra Energy Per Symbol/Bit (EEPS/B) and complexity. This work presents a theoretical model and compares it to simulation
results. We show that PAM outperforms OFDM in terms of better Bit Error Rate (BER), larger dynamic range for modulation depth, less extra power loss, thus higher power efficiency for communication over an Additive White Gaussian Noise (AWGN) channel.
Original languageEnglish
Article number8606269
Pages (from-to)2316-2331
Number of pages16
JournalIEEE Transactions on Vehicular Technology
Volume68
Issue number3
DOIs
Publication statusPublished - 1 Mar 2019

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Keywords

  • communication
  • driver
  • efficiency
  • Illumination
  • LED
  • OFDM
  • PAM
  • power consumption
  • transmitter
  • VLC

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