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Session A4: GNSS in Challenging Environments 2

Interference Likelihood Mapping with Case Studies
Paul Alves, Carmen Wong, Matthew Clampitt, Eric Davis and Eunju Kwak NovAtel Inc., Canada
Location: Grand Ballroom G
Date/Time: Thursday, Feb. 1, 11:00 a.m.

Peer Reviewed

Interference is a growing concern among GNSS users, particularly in parts of the world where radio frequency (RF) transmission is not strictly regulated. Intentional interference and jamming is cheap and relatively easy to obtain in the form of Personal Privacy Devices (PPD). These devices can sometime cause unintended interference and jamming to important infrastructure like an airport (Mitch, et. al. 2013). This paper describes a method for creating an interference map using NovAtel OEM7 Interference Tool Kit (ITK). ITK can be used to measure the power of a received interferer. When data is collected for an area around a static and continuously operating interference source then it can be used to map out the interference over the affected area. This paper describes a method for mapping the interference and, using a model of power loss over distance, create a map of the likelihood of the position of the interferer. This paper includes simulated results and three case studies with live (real-data) interference sources from India, Canada, and Japan.



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