# 3D Indoor Positioning of UAVs with Spread Spectrum Ultrasound and Time-of-Flight Cameras

> Research article (Sensors, 2017) · cited 92× · AI/ML

**Wikidata**: [openalex:W2782491529](https://www.wikidata.org/wiki/openalex:W2782491529)  
**Source**: https://4ort.xyz/entity/3d-indoor-positioning-of-uavs-with-spread-spectrum-ultrasound-and-time-of-flight-cameras