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Algorithms and User Terminals

GPS/Galileo hardware simulator

The working group Algorithms and User Terminals is engaged in the development of algorithms for navigation receivers and their implementation in SW and FPGA. Applications are primarily in professional and safety-of-life areas, e.g. in aviation. Special emphasis is placed on the detection and reduction of propagation errors and interferers as well by advanced signal processing as by adaptive control of array antennas with digital beam forming. For practical testing of these techniques a real-time multi-antenna GPS/Galileo receiver has been developed together with the antenna working group. Additionally, different software simulation environments and an advanced GPS/Galileo hardware simulator are used. Another key topic of work is the signal design for future satellite navigation systems.

Topics of work are:

• Signal processing algorithms
  • Acquisition
  • Tracking
  • Multipath mitigation  
  • Array processing
• User Terminal Development
  • HW-signal simulation
  • SW-receiver
  • FPGA implementation
  • experimental systems
• Interference
  • Interference measurements
  • Interference modelling
  • Methods for interference detection
  • Methods for interference mitigation
• Signal design
  • Development of signal design methods
  • Signal design for satellite navigation

Current Projects:

• ADVANSYS: Design of Advanced Antenna and Multi-Sensor Hybri Receiver for Machine Control in HarSh Environment (EU project)
• BaSE: Bavarian security receiver (funded by BayMWI and DLR Space Agency)
• Dependable Navigation (DLR internal project)
• EGNOS (European Geostationary Navigation Overlay Service) V3 Definition Phase (ESA project)
• GALANT: Galileo Antennen Demonstrator (KN internal project)
• KOMPASSION: Kompakte adaptive Terminalantenne zur störungsfreien Satellitennavigation (funded by BMWi)
• SAMURAI: Sensor Array Processing for Multipath and Radio Interference Identification and Suppression (funded by BMWi)
• TOPGAL: Total Performance concept for GBAS based Automatic Landings (DLR internal project)

Finished Projects:

• ADIBEAM: Adaptive DIgital BEAMforming techniques for GNSS receivers (ESA project, 2009-2010)
• Galileo Signals Assessment in Real Environment (ESA project, 2009-2011)
• ANASTASIA: Airborne New and Advanced Satellite Techniques & Technologies in A System Integrated Approach (EU project, 2005-2009)
• CAGIR: C-band Assessment forGNSS architecture ImpRovement (ESA project, 2007-2009)
• FAGI: Future Air Ground Integration (DLR internal project, 2007-2010)
• FSNSA: Future Satellite Navigation System Architectures (ESA project, 2007-2009)
• GalileoADAP: Galileo-Advanced Applications (DLR internal project, 2006-2011)
• GIRASOLE: Galileo safety-of-life receiver (GJU-project, 2005-2007)
• IMPOSANT: Interference and multipath suppression for high accuracy positioning with array antennas specially for GBAS reference stations (funded by BMWi,  2008-2010)
• LINA: Local Integrity Navigation Augmentation (LuFo IV, 2007-2010)
• UniTaS IV: Support programme for industrial activities and technology transfer in the area of applied satellite navigation for aviation (funded by BMBF, 2007-2010)