Signal Processing and Speech Communication Laboratory
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SoftGNSS 2-A dual frequency software-based GNSS receiver

Period
2009 — 2010
Funding
Österreichische Forschungsförderungsgesellschaft mbH , FFG (Österreich)
Partners
  • 1 Klein- und Mittelunternehmen (Österreich)
  • Institut für Signalverarbeitung und Sprachkommunikation
  • Institut für Navigation
Research Areas
Contact

The main objective of the SoftGNSS project is the development of a software defined Global Positioning System (GPS) receiver whose performance is enhanced by a dual-frequency approach. The combined processing of the L1 and L2c GPS frequency allows for mitigating measurement errors, as for example errors caused by distortions introduced in the Ionosphere. An improved receiver accuracy makes the application of GPS beneficial for an even wider range of applications as compared with todays performance obtained through a single frequency approach. The software defined nature of the system facilitates the adaptation of the receiver to prospective GPS specifications and future Global Navigation Satellite Systems (GNSS), i.e. Galileo, altogether. The receiver comprises a RF front end, a digital signal processing unit and a position, velocity and time (PVT) module. The RF front end receives the GPS satellite signals, modulates the received signal to an intermediate frequency and digitizes it. The digital signal processing unit screens the signal for visible satellites, compensates each satellite signal for delay and frequency shifts and extracts the raw data. In the next stage, the PVT module computes the satellite and receiver position from the raw data while utilizing different error correction algorithms.

Related publications
  • Conference contribution Geiger B., Soudan M. & Vogel C. (2010) On the Detection Probability of Parallel Code Phase Search Algorithms in GPS Receivers. in IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (pp. 864-869). [more info]
  • Conference contribution Berglez P., Seybold J., Geiger B., Soudan M., Vogel C., Abart C., Singh A. & Hofmann-Wellenhof B. (2010) Development of a Dual Frequency Software-based GNSS Receiver. in Proceedings of the ION GNSS 2010 (pp. 1967-1974). [more info]
  • Conference contribution Soudan M. & Geiger B. (2010) On the Averaging Correlation for Satellite Acquisition in Software Defined Radio Receivers. in Proceedings of the ION GNSS 2010 (pp. 3284-3289). [more info]