Vehicle Impact on Personal Privacy Device (PPD) Performance

Daniel N. Aloi and Ashley R. Steffes

Abstract:	Personal Privacy Devices (PPDs) have posed an interference risk to the ground and air sub-systems of the Local Area Augmentation Systems (LAAS). This threat occurs when a vehicle equipped with a PPD drives by an airport. In order to characterize the significance of this threat, a working group within the Federal Aviation Administration (FAA) was assembled to create a detailed link budget model for this scenario. The impact of the vehicle platform is a crucial element of this model. ˜This paper performs a detailed analysis on the impact of the vehicle platform on the PPD radiated three-dimensional radiation pattern from a vehicular platform. The study is inclusive of 3 vehicle platforms (sedan, truck, and van), 2 PPD antennas, 3 PPD locations with each vehicle (dashboard, seat, floor) and 2 PPD antenna orientations (vertical and horizontal) totaling 36 distinct configurations. In each configuration the three-dimensional radiation pattern was measured at an automotive antenna range making measurements with a spatial resolution of 5 degrees in the elevation plane and 2 degrees in the azimuth plane. The range of angles was 0° to 95° and 0° to 358° in the elevation and azimuth planes, respectively. Data analysis was then performed to show the impact of the vehicle platform, antenna type, antenna location and antenna orientation.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	3558 - 3562
Cite this article:	Aloi, Daniel N., Steffes, Ashley R., "Vehicle Impact on Personal Privacy Device (PPD) Performance," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 3558-3562.
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