The ‘Namuru’ Open GNSS Research Receiver: An update

Dynamic test

The dynamic test is designed to exercise the receiver tracking loops. The airplane scenario is convenient as it is easy to calculate cross-track and height errors, and provides a constant acceleration of around 1.6G. Time series plots for crosstrack and height errors are shown, as well as a table of statistics.

Conclusion

The Namuru project has reached a significant milestone – we have a proven circuit board, reference baseband design and application software. The performance of the receiver during static and dynamic tests has been shown to be comparable to a well established receiver. A new circuit board is on the way, offering dual front ends, USB 2, a bigger FPGA part and more memory. The main hitch is the application software, and plans are underway to tackle this issue.

References

GPS Architect 12 Channel GPS Development System (1997) Mitel Semiconductor

Namuru FPGA GPS tracking module Data Sheet, Issue 1.1 2006, http:// dynamics.co.nz/gpsreceiver

PARKINSON, K., DEMPSTER, A., MUMFORD, P., RIZOS, C. 2006. Improving signal quality in FPGA based GPS receiver designs. Symp. on GPS/GNSS, Surfers Paradise, Australia, 17-21 July

MUMFORD, P., PARKINSON, K., DEMPSTER, A. 2006. An Open GNSS Receiver Research Platform. Symp. on GPS/GNSS, Surfers Paradise, Australia, 17-21 July

MUMFORD, P., PARKINSON, K., & ENGEL, F., 2006. An open GNSS receiver platform architecture. Coordinates, 2(1), 28-31

Signav, 2005. MG5000 Series GPS Receiver User Guide, MG5-200-GUIDS-User Guide- B.T11 signav.com.au

ENGEL, F., HEISER, G., MUMFORD, P., PARKINSON, K., & RIZOS, C., 2004. An open GNSS receiver platform architecture. Journal of GPS, 3(1-2), 63-69.

Open GNSS Projects web page at http://gps.psas.pdx.edu/ OpenGnssProjects