Performance comparison for illumination and visible light communication system using buck converters

Abstract

This paper presents a new analysis of the illumination and communication performance for visible light communication (VLC) with variable pulse position modulation (VPPM). In particular, it addresses the extra power losses due to the data modulation if a traditional buck converter LED driver is adapted for VLC. We compare VLC systems using two previously proposed driver schemes in the aspects of efficiency, illumination power, data rate and BER.

An In-depth Survey of Viisiiblle Liight Communiicatiion Modullatiing and Codiing schemes for Diimmiing/Flliicker Avoiidance Technollogiies

“…VPPM is the modulation scheme suggested by the IEEE 802.15 standard group [47]. It uses PWM for dimming control and binary PPM for communication [36,48]. However, the main obstacle of the VPPM scheme is that the data rate is limited to the bandwidth of an LED since it uses only binary PPM modulation.…”

“…The bandwidth efficiency of MPPM can be decreased to about half of PPM at the same transmission efficiency [29,[50][51]. It analyzed communication performance in terms of the normalized less power requirement, the best achievable rate and relative high spectral efficiency [20,23,48].…”

Reproducing Single-Carrier Digital Modulation Schemes for VLC by Controlling the First Switching Harmonic of the DC–DC Power Converter Output Voltage Ripple

“…Fig. 3 shows the two most extended approaches for performing that method: using a MOSFET in series [36]- [37] or in parallel [38]- [40] with the HB-LED string. In these methods, the data rate is determined by the pulse waveform frequency, which is strongly limited by the HB-LED bandwidth.…”

On the Role of Power Electronics in Visible Light Communication

“…Some implementations of DC/DC converters performing both illumination and transmission functionalities have already been proposed [35][36][37][38]. However, as stated in [39], the bit rate achieved is too low due to the simple modulation schemes used: On-Off Keying (OOK) or Pulse Position Modulation (PPM), which correspond to the case of PBT.…”