Design and Performance Analysis of a Directly Modulated Direct Current-Biased Optical Orthogonal Frequency-Division Multiplexing Visible-Light Optical Wireless Link Under Atmospheric Turbulence
Abstract
This paper presents a simulation-based 16-quadrature amplitude modulation (16-QAM) direct current-biased optical orthogonal frequency-division multiplexing (DCO-OFDM) visible-light optical wireless system using a 520 nm InGaN directly modulated laser (DML) and direct detection over 500 m. A 1024-point transform with 511 data subcarriers provides approximately 15 Gb/s gross and 14.82 Gb/s payload rates without external optical modulators or amplifiers. Under the adopted static line-of-sight model, the simulated bit-error rate (BER) falls below 10−3 at a receiver-side equivalent optical signal-to-noise ratio (OSNR) of about 17 dB and remains below this threshold for beam divergence up to 9 mrad. Gamma–Gamma simulations show that a 5 cm aperture maintains BER
Fields of Study & Subjects
Optical Wireless Communication Technologies
Advanced Photonic Communication Systems
Optical Network Technologies
Publication details
- Journal / source
- Applied Sciences
- Publisher
- MDPI AG
- Volume
- 16
- Issue
- 13
- Pages
- 6324–6324
- Publication date
- 24 June 2026
- Language
- EN