Baidu Maps Tech Team

Jul 20, 2016 · Fundamentals

Unlocking Indoor Positioning: From Geometry to Wi‑Fi Fingerprinting

This article provides a comprehensive overview of indoor positioning technologies, explaining why satellite GPS fails indoors and detailing geometric methods such as TOA, TDOA, AOA, RSSI, as well as Wi‑Fi‑based fingerprinting, hybrid models, and magnetic field techniques, comparing their accuracy, cost, and deployment requirements.