Propagation Modelling of GPS Signals
It has been previously shown  that the Parabolic Equation (PE) technique is well suited to solving GPS propagation problems over large domains. This paper presents the results of a modified model, which includes the effects of backscatter and provides time-domain representation of the propagated GPS signal. Results are presented for various difficult GPS propagation environments, including the determination of the Multipath Channel Impulse Response (MCIR) from the PE.
KeywordsDiffractive Effect Propagation Angle Multipath Error Multipath Signal Satellite Elevation
Unable to display preview. Download preview PDF.
- 1.R.A. Walker, “Numerical Modelling of GPS Signal Propagation,” Presented at ION GPS-96, Kansas City, 1996.Google Scholar
- 2.M.S. Braasch, “On the Characteristics of Multipath Errors in Satellite-Based Precision Approach and Landing Systems,” PHD Thesis, Department of Electrical and Computer Engineering. Ohio University, 1992, pp. 203.Google Scholar
- 3.B. Townsend and P. Fenton, “A Practical Approach to the Reduction of Pseudorange Multipath Errors in a L1 GPS Receiver,” Presented at 7th International Technical Meeting of the Satellite Division of the Institute of Navigation., 1994.Google Scholar
- 4.A.J. Van Dierendonck, P. Fenton, and T. Ford, “Theory and Performance of Narrow Correlator Spacing in a GPS Receiver,” Presented at the Institute of Navigation National Technical Meeting, San Diego, CA, 1992.Google Scholar
- 5.L. Garin, F. Van Diggelan, and J. Rousseau, “Strobe and Edge Correlator Multipath Mitigation for Code,” Presented at the 9th International Technical Meeting of the Satellite Division of the Institute of Navigation., Kansas City, MI, 1996.Google Scholar
- 6.R.D.J. Van Nee, “Multipath and Multi-Transmitter Interference in Spread-Spectrum Communication and Navigation Systems,” PHD Thesis, Faculty of Electrical Engineering, Telecommuncation and Traffic Control Systems Group. Delft University of Technology, 1995, pp. 205.Google Scholar
- 7.L.R. Weill, “Achieving Theoretical Accuracy Limits for Pseudoranging in the Presence of Multipath,” Presented at the 8th International Technical Meeting of the Satellite Division of the Institute of Navigation., Palm Springs, CA, 1995.Google Scholar
- 9.R.A. Walker, “Operation and Modelling of GPS Sensors in Harsh Environments,” PHD Thesis, School of Electrical and Electronic Systems Engineering: Queensland University of Technology, 1997.Google Scholar
- 10.R.H. Hardin and F.D. Tappert, “Applications of the Split-Step Fourier Method to the Numerical Solution of Nonlinear and Variable Coefficient Wave Equations,” SIAM Review, Vol. 15, pp. 423, 1973.Google Scholar
- 11.A.E. Barrios, “Terrain and Refractivity Effects on Non-Optical Paths,” Presented at AGARD Electromagnetic Wave Propagation Panel Symposium, Rotterdam, The Netherlands, 1993.Google Scholar
- 12.F.B. Jensen, W.A. Kuperman, M.B. Porter, and H. Schmidt, “Broadband Modelling,” in Computational Ocean Acoustics, R.T. Beyer, Ed. New York: AIP Press, 1994.Google Scholar