Napredni programsko definirani sprejemnik za sporočila ADS-B

Repas, Blaž (author), Ricciato, Fabio (mentor)

V tem magistrskem delu sta predstavljeni zasnova in implementacija naprednega programsko definiranega sprejemnika za sporočila ADS-B/Mode-S, ki jih oddajajo plovila v letalskem prometu za namene kontrole zračnega prometa. Predstavljena in argumentirana je zasnova programske procesne verige za sprejem signalov, ki poleg osnovnega dekodiranja paketov služi tudi kot platforma za nadgradnjo in razvoj naprednih funkcij. Prav to je s pridom uporabljeno za razvoj in vrednotenje metode za določanje časa prihodov paketov, kar je ključen podatek pri pasivnem določanju položaja in sledenju letečih plovil. V tej magistrski nalogi je predstavljenih in ovrednotenih več metod za določanje časa prihodov paketov vključno z izvirnim pristopom, ki upošteva položaj vrhov v signalu ter dosega časovno natančnost tudi do 1,2 nanosekunde. V nadaljevanju je predstavljena metoda za izboljšavo dekodiranja z razreševanjem kolizij paketov. Le-ta deluje na podlagi tehnike izničevanja signala paketa, ki je bila razvita v sklopu tega magistrskega dela. Delo predstavi tudi potencialne izboljšave, ki bi v prihodnosti omogočile razvoj kognitivnega sprejemnika.

• Language: English
• Keywords: Programsko definirani radio, ADS-B, nadzor letalskega prometa, sprejemnik
• Work type: Master's thesis/paper
• Organization: FRI - Faculty of Computer and Information Science
• Year: 2017
• PID: 20.500.12556/RUL-96684
• Publication date in RUL: 10.10.2017

Secondary language

• Language: Slovenian
• Title: Advanced receiver for ADS-B messages in Software-Defined Radio

Abstract

This master thesis presents the work of designing and implementing an advanced software-defined radio receiver for ADS-B/Mode-S messages, broadcasted from aircraft for the use in air traffic control. It presents and argues the design of the software receiver chain and introduces a platform that enables augmenting the basic receiver chain with advanced features. Furthermore, this work leverages the software receiver possibilities to implement and evaluate packet timestamping techniques that produce packet time-of-arrival information necessary for passive position tracking of airplanes. Multiple timestamping techniques are implemented and evaluated including a novel peak-position based approach that achieves precision of impressive 1.2 nanoseconds. Moreover, this thesis produces a method for improving packet decoding by means of packet collision resolution. Proof of concept collision resolution is achieved by facilitating the packet signal cancellation method developed in this work. This thesis also presents improvements for the future that would allow the developed receiver to become cognitive.

• Keywords: Software Defined Radio, ADS-B, Airplane Surveillance, Receiver