1 research outputs found
Experimental Evaluation of a Pseudo-Doppler Direction-Finding System for Localizing Radio Tags
We present the design of a radio antenna system for obtaining instantaneous
bearing measurements towards a radio emitter. Our work is motivated by
applications where robots are used for localizing and tracking radio-tagged
wildlife. The traditional method is to use directional antennas that need to be
rotated in order find the bearing which is time consuming. Instead, we present
a low-cost system capable of finding bearing measurements almost
instantaneously using an antenna array. This is particularly appealing for
wildlife tracking with Unmanned Aerial Systems (UASs) where remaining
stationary can be challenging and energy consuming, in addition to being slow.
The proposed system uses existing open source hardware and software systems and
leverages principles of pseudo Doppler direction-finding. The resulting system
was tested in an anechoic chamber and in outdoor settings. The outdoor tests
with particle filtering show that the resulting system is capable of localizing
radio tags within 5 meter accuracy starting with an initial estimate of 200m x
200m