Abstract
The radio frequency signals transmitted by Global Navigation Satellite
Systems (GNSS) have very low power and are susceptible to radio frequency
interference. Most GNSS receivers do not measure and quantify any
interference they may be suffering; they just do what they can with the
signals they receive. Interference can lead to poor receiver positioning
performance and, if severe, such as in a jamming environment, complete
positioning failure. Interference monitoring could be beneficial in areas such
as airports where GNSS positioning will soon be more critical and
interference could be present.
This paper outlines the work to date on developing an interference detection
device based around the Namuru GNSS receiver platform developed at the
University of New South Wales (UNSW). The detection device is a
hardware and embedded software realization of detection schemes and
algorithms developed at UNSW. The detection technique is briefly explained
followed by a discussion of the hardware design, software implementation,
testing and results, some conclusions and finally, a discussion of possible
future activities.