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GNSS RECEIVER TESTING TECHNIQUES IN A LABORATORY ENVIRONMENT

M. Sc. E.E . MIELNIK Piotr. Institute of Radar Technology Military University of Technology Warsaw Poland. GNSS RECEIVER TESTING TECHNIQUES IN A LABORATORY ENVIRONMENT. Area of activity the Institute of Radar Technology connected with satellite navigation systems technique.

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GNSS RECEIVER TESTING TECHNIQUES IN A LABORATORY ENVIRONMENT

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  1. M.Sc.E.E. MIELNIK Piotr Institute of Radar Technology Military University of Technology Warsaw Poland GNSS RECEIVER TESTING TECHNIQUES IN A LABORATORY ENVIRONMENT Workshop EGNOS KRAKÓW 2004

  2. Area of activitythe Institute of Radar Technology connected with satellite navigation systems technique • Jamming cancellation techniques (not only in military aspects - warfare) • Testing the properties of GNSS receivers • Developing and testing of algorithms for INS/GPS receivers • Developing CRPA antennas (adaptive antenna) • Developing pseudosattelite construction (pseudolite) • Developing DGNSS landing systems (LAAS) • Researches in attitude determinationreceivers area • Researches in time synchronizations area Workshop EGNOS KRAKÓW 2004

  3. Jamming cancellation techniques • The works concentrate on three aspects: • designing antenna systems • null steering and beam forming • designing specialized receivers • algorithms used before and after correlation • detection, identification and localizationof jamming sources • The following methods are considered: • controlled antenna pattern • front-end filtering • signal detection algorithms (RFI, jamming and spoofingsignals) • signal processing algorithms • code / carrier tracking loop • integrated demodulator navigation Workshop EGNOS KRAKÓW 2004

  4. Testing the properties of GNSS receiver Delay Lock Loop Phase Lock Loop simulated signal Data demodulation Automatic Gain Control Low Noise Amplifier Algorithms for data processing and signal monitoring Signal conversion The essence of the investigations is to find disadvantages ofeach receiver Workshop EGNOS KRAKÓW 2004

  5. Testing new multi frequency receiver constructions Currentlystill in Simulink environment Workshop EGNOS KRAKÓW 2004

  6. Designing and checking algorithms for integrated navigation systems AHRS GPS Chip &board Algorithms implementation Themaingoal is to construct Embedded GPS/INS module (EGI) Workshop EGNOS KRAKÓW 2004

  7. Developing CRPA antennas (adaptive antenna) These applications request Buttler matrix Workshop EGNOS KRAKÓW 2004

  8. Tans Vector – GPS receiver for attitude determination Not only for aircraft navigation Workshop EGNOS KRAKÓW 2004

  9. The basis of MUT laboratories Electronics faculty • The laboratory of digital techniques Stands to design specialized chips • The laboratory of antenna techniques Chamber • Avionics laboratory GNSS simulator Workshop EGNOS KRAKÓW 2004

  10. The Avionics Laboratory at the Institute of Radar Technology The only device of this class in Poland Workshop EGNOS KRAKÓW 2004

  11. The short description of GNSS Simulator Current Options • generation of 16 satellite signals (GPS L1,code C/A and P) • generation of SBAS signals (WAAS, EGNOS, MSAS) • object remote control in the real time (closed loop) • simulating the DGPS referencestation (withRTCMprotocol) simultaneously to the operation • simulating the LAAS reference station (withRTCA protocol)simultaneously to the operation • simulating the baroaltimetersimultaneously to operation • tools for analyzing the EUT output data in the real time ! • software that enables to generate data for GPS L2c, L5 and GLONASS signals Workshop EGNOS KRAKÓW 2004

  12. DGPS LAAS System SBAS Systems Space Segment Signal propagation GPS SYSTEM User Segment Workshop EGNOS KRAKÓW 2004

  13. Space Segment • satellites orbit motion edition (tosatellite constellation control) • navigation data control • ISCN and SA distortion • satellites signal power control • satellite transmitter antenna characteristic edition Workshop EGNOS KRAKÓW 2004

  14. Signal propagation • iono and tropo- parameters edition (atmosphere modelling) • navigation data distortion (with bit resolution) • multipath simulation • terrain obstacles simulation • signal phase and amplitude distortion modelling Workshop EGNOS KRAKÓW 2004

  15. User segment • vehicletypechoice (aircraft, ship, car and spacecraft) and its dynamicsparameters • vehicle position and motion simulation • receiver antenna characteristic modelling • receiver antenna orientation with respectto Body Axes of vehicle Workshop EGNOS KRAKÓW 2004

  16. EGNOS signal • edition ofMonitoring Stations location • message data control (16 types of messages) • signal power control • edition ofdegradation parameters • user range error edition • covariance matrix edition (clock, ephemeris) • almanac edition • ionospheric error dataedition Workshop EGNOS KRAKÓW 2004

  17. EquipmentUnder Test Laboratory Basis Research methodology Goals Type of receiver Data protocols Measurement equipment Expectations PROJECT Workshop EGNOS KRAKÓW 2004

  18. GNSS receiver performance characteristics studies* * This set is used to check some specialized software for awareness situations, too Workshop EGNOS KRAKÓW 2004

  19. Examination of GPS receivers for time synchronization Workshop EGNOS KRAKÓW 2004

  20. CRPA antenna tests research set Workshop EGNOS KRAKÓW 2004

  21. Test bench for LAAS application Workshop EGNOS KRAKÓW 2004

  22. Thank you for attention Workshop EGNOS KRAKÓW 2004

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