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Air Traffic Simulation with HackRF One
Mikan, Lukáš ; Dvořák, Vojtěch (oponent) ; Šťáva, Martin (vedoucí práce)
This work deals with air traffic simulation in the context of a multilateration surveillance system. The technique of multilateration calculates aircraft position at the intersection of hyperboloids, obtained from the differences in time of arrival of transponder messages to multiple receivers at known coordinates. By substituting an SDR module for each receiving antenna, air traffic can be simulated with the use of made-up ADS-B messages which get sent to the various antenna ports with proper timing. This thesis uses the HackRF One SDR that had both its hardware and firmware modified in order to achieve tightly synchronized transmissions from potentially any number of interconnected HackRF units. The modifications described herein ensure an identical sampling clock, both frequency- and phase-wise, across all units, as well as simultaneous triggering of transmissions. In the second part of the thesis, an algorithmic solution is presented for assembling fictional air scenarios with arbitrary number of flights and receiving stations. The output is a set of data streams suitable to be transmitted through synchronized HackRF's. Each stream represents a specific vantage point, a specific antenna, and contains precisely timed ADS-B messages, encoded using pulse-position modulation and converted into IQ samples. The complete solution can be used to validate the functioning of a real multilateration system, such as the MSS made by ERA, a.s.
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Air Traffic Simulation with HackRF One
Mikan, Lukáš ; Dvořák, Vojtěch (oponent) ; Šťáva, Martin (vedoucí práce)
This work deals with air traffic simulation in the context of a multilateration surveillance system. The technique of multilateration calculates aircraft position at the intersection of hyperboloids, obtained from the differences in time of arrival of transponder messages to multiple receivers at known coordinates. By substituting an SDR module for each receiving antenna, air traffic can be simulated with the use of made-up ADS-B messages which get sent to the various antenna ports with proper timing. This thesis uses the HackRF One SDR that had both its hardware and firmware modified in order to achieve tightly synchronized transmissions from potentially any number of interconnected HackRF units. The modifications described herein ensure an identical sampling clock, both frequency- and phase-wise, across all units, as well as simultaneous triggering of transmissions. In the second part of the thesis, an algorithmic solution is presented for assembling fictional air scenarios with arbitrary number of flights and receiving stations. The output is a set of data streams suitable to be transmitted through synchronized HackRF's. Each stream represents a specific vantage point, a specific antenna, and contains precisely timed ADS-B messages, encoded using pulse-position modulation and converted into IQ samples. The complete solution can be used to validate the functioning of a real multilateration system, such as the MSS made by ERA, a.s.
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Jednotné evropské nebe
Doležal, Ladislav ; Zelený, Lubomír (vedoucí práce) ; Toltési, Štefan (oponent)
Tato práce analyzuje program Jednotné evropské nebe, který má za cíl reorganizaci vzdušného prostoru a efektivnější poskytování navigačních a letových sluţeb v Evropě. Rozebírá stav implementace jednotlivých funkčních bloků vzdušného prostoru a popisuje Maastricht Upper Area Control, coţ je středisko řízení letového prostoru zahrnující čtyři státy.
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