Global Navigation Satellite System

Fraunhofer Institute for Integrated Circuits

Sat

Receiver Platforms

Empfängerprototyp


FEchip

The market of search and rescue forces requires more and more receivers featuring high precision and integrity of the position. Satellite-based augmentation systems (SBAS), such as WAAS for the America or EGNOS for Europe, are important extension systems for the optimization of accuracy and reliability of the corresponding localization solution. For this reason, the Fraunhofer engineers have developed a special chip set consisting of an analog frontend and a digital baseband chip. Using this chip set, a prototype receiver was built which features the following specifications:






 

RF Frontend-Chip

  • L1 GPS/ EGNOS navigation receiver
  • Low-IF architecture with 3.996 MHz
  • 4 MHz bandwidth
  • 350 nm SiGe BiCMOS technology
  • Die size 2.5 mm x 2.5 mm
  • Power consumption 30 mA (3,3 V)
  • Gain 85 dB
  • 2 Bit ADC

Digital baseband chip

  • Highly integrated L1 (GPS/ EGNOS) baseband signal processing unit
  • 15 independent channels, each channel featuring 6 correlators
  • Fs/4-frequency mixer, polyphase FIR filter
  • SoC 32 bit RISC processor with 40 MHz
  • 180 nm CMOS technology
  • Die size 5 mm x 5 mm
  • Power consumption 20 mA (1,8 V)

Receiver prototype

  • 12 V voltage supply
  • 4 MB SRAM
  • 2 MB Flash RAM
  • Horizontal position error < 5 m
  • Vertical position error < 7 m
  • Speed resolution < 0.5 m/s
  • Specialized for search and rescue forces