Software Simulation Method for Digital if GNSS Signal

Abstract:

Data simulation is an important auxiliary method for baseband signal processing algorithm design of digital IF GNSS receiver. Especially when the high sensitivity and high dynamic receivers are developed, or multipath and cross correlation mitigation techniques are considered, exact and complete tests under all kinds of necessary scenes can be carried out with the IF signal data which is generated by software simulation method. With this method, the developing efficiency can be improved and the cost can be cut down. In this paper, precise model of the IF signal is given firstly through analyzing GNSS receivers RF processing flow. Then, considering the discrete characteristic of software processing, the IF signal simulation flow and block of the simulation software are designed. Finally, the specific design process is given through a design example. When the IF signal simulation software is used for testing baseband signal processing algorithms, GNSS receivers IF signal data under every necessary test scene can be generated just by parameter adjustment.

• Periodical: Advanced Materials Research (Volumes 756-759)
• Pages: 2655-2659
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.756-759.2655
• Online since: September 2013
• Authors: Xiang Yu Wu, Jin Rui Liu, Hang Gong, Gang Ou
• Keywords: Band Limiting Filter, Digital if Signal, GNSS Receiver, Software Simulation, Spectrum Aliasing

References

[1] B.Y. Tsui, Fundamentals of Global Positioning System Receivers: A Software Approach. Second Edition, Hoboken, New Jersey: John Wiley&Sons, Inc., (2005).

[2] P. Misra, P. Enge, Global Positioning System Signals, Measurement, and Performance, Second Edition, Ganga-Jamuna Press. (2006).

[3] I.Z. Nessreen, GNSS Receivers for Weak Signals, Norwood, Massachusetts: Artech House, Inc., (2006).

[4] C.X. Li, F.X. Wang, Correlation of PN spread spectrum signal under first-order dynamics, Acata Electronica Sinica, Beijing, vol. 35, No. 9, pp.1769-1793, 2007. (in Chinese).

[5] H.C. Liu, Research on the Multipath Effects and Mitigation Techniques in Satellite Navigation Systems, National University of Defense Technology Doctor Dissertation, 2010, 4. (in Chinese).

[6] E.P. Glennon, A Review of GPS Cross Correlation Mitigation Techniques, The 2004 International Symposium on GNSS/GPS, Sydney, Australia, 6-8 December (2004).

[7] E.D. Kaplan, C.J. Hegarty, Understanding GPS Principles and Applications. Second Editon, Norwood, Massachusetts: Artech House, Inc., (2006).