# Indoor Positioning Tightly Coupled Wi-Fi FTM Ranging and PDR Based on the Extended Kalman Filter for Smartphones

> Research article (IEEE Access, 2020) · cited 67× · AI/ML

**Wikidata**: [openalex:W3011284221](https://www.wikidata.org/wiki/openalex:W3011284221)  
**Source**: https://4ort.xyz/entity/indoor-positioning-tightly-coupled-wi-fi-ftm-ranging-and-pdr-based-on-the-extended-kalman-filter-for-smartphones