Πλοήγηση ανά Συγγραφέας "Tsirigotakis, Dimitrios"

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    Implementation of a low-cost radio frequency direction finder network, based on TDoA technique.
    (ΕΛ.ΜΕ.ΠΑ., Σχολή Μηχανικών (ΣΜΗΧ), ΠΜΣ Πληροφορική και Πολυμέσα, 2023-07-26) Tsirigotakis, Dimitrios; Τσιριγωτάκης, Δημήτριος
    The origin of a Radio signal transmission is useful to be located either for “search and rescue”, for military purposes, or just for airplane orientation regarding the landing. “Time Difference of Arrival” (TDoA) is a method that has been used to locate a signal such as an acoustic wave, a seismic wave, or an RF signal transmission. Thanks to the TDoA method, the transmitted signal reaches multiple distant receiver sites with synchronized 'clocks' at a different timing. So the approximate determination of the transmitter location in two or three dimensions would become possible by just placing some pairs of receivers, at known fixed locations. TDoA uses “Trilateration” or “Multilateration” mathematical techniques and high accuracy time information in order to gain a very good bearing resolution. In this scope, this thesis objective is the creation of a network of three or more ESP32-controlled remote Signal Receiving Stations, and a Raspberry-Pi controlled HTTP Server, providing a world map through “Node Red” environment. The user will be able to set both a radio frequency, and a modulation type (AM/FM) on the server’s page, and present the signal transmitter’s location on a map. The whole system will be based on the ‘’Trilateration’’ or ‘’Multilateration’’ technique.