Impact of LED Current Waveforms on FSK-Based VLC Performance and Design of a Flyback Driver for Square-Wave Modulation | Zendy

Lucas H. G. Resende | Zendy; Ruan M. Ferraz | Zendy; Pedro S. Almeida | Zendy; Guilherme M. Soares | Zendy; Henrique A. C. Braga | Zendy

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Impact of LED Current Waveforms on FSK-Based VLC Performance and Design of a Flyback Driver for Square-Wave Modulation

Author(s) -

Lucas H. G. Resende,

Ruan M. Ferraz,

Pedro S. Almeida,

Guilherme M. Soares,

Henrique A. C. Braga

Publication year - 2025

Publication title -

ieee access

Language(s) - English

Resource type - Magazines

SCImago Journal Rank - 0.587

H-Index - 127

eISSN - 2169-3536

DOI - 10.1109/access.2025.3612328

Subject(s) - aerospace , bioengineering , communication, networking and broadcast technologies , components, circuits, devices and systems , computing and processing , engineered materials, dielectrics and plasmas , engineering profession , fields, waves and electromagnetics , general topics for engineers , geoscience , nuclear engineering , photonics and electrooptics , power, energy and industry applications , robotics and control systems , signal processing and analysis , transportation

This paper analyzes the performance of Visible Light Communication (VLC) systems when different LED current waveforms are applied, aiming to guide the design of switched-mode converters using Frequency Shift Keying (FSK) modulation schemes. Both theoretical calculations and experimental tests were conducted for sinusoidal, triangular, and square current waveforms, revealing that the square waveform provides superior noise immunity, allowing transmission over distances up to three times longer than the other waveform types while maintaining a satisfactory Bit Error Rate (BER). Furthermore, the work presents a method for designing an LED driver capable of producing square-shaped current signals, based on a flyback converter operating in Continuous Conduction Mode (CCM). This topology enables single-switch control of both the average current and the data modulation. A laboratory prototype rated at 35-W and powered by a 300-V DC supply with a 13.7-V ripple was built and tested, demonstrating reliable data transmission over distances of up to 3 meters, achieving satisfactory BER and reaching data rates of 234 kb/s.

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