Title: Spin Effects of GPS Signals on a Multi-Antenna Mounted Vehicle
Author(s): Hun Cheol Im, Yun Sub Choi, Sang Jeong Lee
Published in: Proceedings of IEEE/ION PLANS 2016
April 11 - 14, 2016
Hyatt Regency Hotel
Savannah, GA
Pages: 313 - 319
Cite this article: Im, Hun Cheol, Choi, Yun Sub, Lee, Sang Jeong, "Spin Effects of GPS Signals on a Multi-Antenna Mounted Vehicle," Proceedings of IEEE/ION PLANS 2016, Savannah, GA, April 2016, pp. 313-319.
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Abstract: This paper describes the spin effects of GPS signals on a multi-antenna mounted vehicle. To receive GPS signals continuously on a spinning vehicle, multiple patch antennas with overlapped antenna beamwidths can be used. First, this study focused on a four-antenna configuration. In this configuration, signal nulls or severe attenuations occurred due to destructive interference from mixed signals, and the carrier phase changed abruptly as the combination of the receiving antennas changed. Because it is difficult to track the signal continuously due to the problems discussed here, two methodologies were examined to solve these problems. The first was to narrow the antenna beamwidth, and the second was to use three antennas. In both cases, the spin effects decreased. Finally, modeling and simulations using a software GPS receiver was conducted, and it was shown that the simulation results were in good agreement with the analytical results.