Device and method for the improved directional estimation and decoding by means of secondary radar signals
A technology for direction estimation, secondary radar, applied in measurement devices, direction finders using radio waves, reflection/re-radiation of radio waves, etc., can solve manufacturing and installation tolerances, doubling problems, etc.
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[0058] Secondary radar at 1090 MHz is used to identify and communicate general flight data between flying objects, ground vehicles and air traffic control. The present work consists in the task of extending the application of its multilateration-based concept to the field of position determination.
[0059] However, the construction of a multilaterations system is a difficult task. The signal arrival times must be determined very precisely and precise synchronization of all participating receivers must be achieved. Furthermore, the system is sensitive to intersymbol interference (ISI). Although E.Piracci, N.Petrochilos and G.Galati disclose an algorithm in EURAD, 2007 "Single-antenna Projection Algorithm to discriminate superimposed Secondary Surveillance Radar Mode S Signals", which reduces the impact of ISI, but the algorithm Based on a data model considering only Mode S signals.
[0060] An array of antennas for direction estimation could improve the performance of multi...
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