Literature Database Entry

eising2024improving

Nils Erik Eising, "Improving Accuracy of WiFi-FTM-based Ranging with Frequency Diversity," Bachelor Thesis, School of Electrical Engineering and Computer Science (EECS), TU Berlin (TUB), October 2024. (Advisor: Sascha Rösler; Referees: Anatolij Zubow and Thomas Sikora)

Abstract

Accurate localisation for outdoor environments is well-established through satellite-based systems, but indoor precision remains challenging due to signal interference and multipath fading. This thesis uses frequency diversity to improve the accuracy of Wireless Fidelity (WiFi) Fine Time Measurments (FTM) for indoor ranging. The main issue tackled is the inconsistency of single-channel FTM, which is prone to overestimation and unreliable measurements across different environments. A multi-channel measurement system was developed to address this, and several channel selection strategies were algorithmically analysed for accuracy in various scenarios. Results show that using strategies to pick data from FTM measurements across multiple channels reduces distance estimation errors and improves consistency, especially in non-Line of Sight (LoS) scenarios. Though multi-channel approaches add complexity, they offer less deviation and are thus more accurate in almost all scenarios than single-channel methods. In conclusion, multi-channel WiFi-FTM systems are a practical solution for enhancing indoor localisation accuracy. Future work could optimise channel selection for fast, real-time applications.

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Nils Erik Eising

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@phdthesis{eising2024improving,
    author = {Eising, Nils Erik},
    title = {{Improving Accuracy of WiFi-FTM-based Ranging with Frequency Diversity}},
    advisor = {R{\"{o}}sler, Sascha},
    institution = {School of Electrical Engineering and Computer Science (EECS)},
    location = {Berlin, Germany},
    month = {10},
    referee = {Zubow, Anatolij and Sikora, Thomas},
    school = {TU Berlin (TUB)},
    type = {Bachelor Thesis},
    year = {2024},
   }
   
   

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Last modified: 2026-04-21