Validation of Land Mobile Satellite Channel Model for GNSS Receiver Performance Assessment

Juan M. Parro, Jose A. Garcia-Molina, Till Schmitt and Gustavo López-Risueño

Abstract:	This work presents a channel model validation campaign performed by the authors comparing field tests against laboratory tests using a hardware simulator and the ITU recommendation P.681-8 channel model as simulation tool. Two different live tests were performed in urban and suburban environments recording the signals with an IF digitizer for later replay. A thorough methodology was followed in the laboratory to adapt the wideband band channel model from the ITU recommendation P.681-8 for its use in the hardware simulator. For practical reasons, the channel impulse response was reduced to a simplified channel of 2 taps (LOS + echo). Also, the satellite and user dynamics were chosen carefully to maximize the number of samples in all angles of arrival providing a fair comparison when analyzing the effect of satellite elevation angles. Finally, the results of the live tests are compared against the laboratory simulations of urban and suburban versions of the ITU-R wideband model. With the positive results obtained from this validation, the authors generated a repository of channel impulse responses simulating different GNSS constellation, frequency bands, environments and user dynamics.
Published in:	Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018) September 24 - 28, 2018 Hyatt Regency Miami Miami, Florida
Pages:	180 - 189
Cite this article:	Parro, Juan M., Garcia-Molina, Jose A., Schmitt, Till, López-Risueño, Gustavo, "Validation of Land Mobile Satellite Channel Model for GNSS Receiver Performance Assessment," Proceedings of the 31st International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2018), Miami, Florida, September 2018, pp. 180-189. https://doi.org/10.33012/2018.15832
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