# High-accuracy VLC-based indoor positioning system using multi-level modulation

> Research article (Optics Express, 2019) · cited 30× · AI/ML

**Wikidata**: [openalex:W2919032488](https://www.wikidata.org/wiki/openalex:W2919032488)  
**Source**: https://4ort.xyz/entity/high-accuracy-vlc-based-indoor-positioning-system-using-multi-level-modulation