LeakyTrack: Non-coherent single-antenna nodal and environmental mobility tracking with a leaky-wave antenna
Part Of
SenSys 2020 - Proceedings of the 2020 18th ACM Conference on Embedded Networked Sensor Systems
Journal Volume
7
Start Page
56
End Page
68
ISBN (of the container)
978-145037590-0
Date Issued
2020-11-16
Author(s)
Abstract
Radio frequency signals have the potential to convey rich information about a node's motion and surroundings. Unfortunately, extracting such information is challenging, previously requiring accurate phase measurement, large antenna array structures, or extensive training. In this paper, we present LeakyTrack, a novel system that enables non-coherent and training-free motion sensing with a single antenna. The key idea is to create unique spectrally coded signals at different spatial directions so that geometric properties of the receiving node, as well as any potential objects in the environment, leave spectral footprints on the collected signal. To do so, we exploit a THz leaky-wave antenna and realize a color-coded scan in which signals with distinct spectral characteristics simultaneously emit across the angular domain. LeakyTrack infers nodal and environmental motion by analyzing the received spectral profile. We evaluate the performance of LeakyTrack via extensive over-the-air experiments.
Event(s)
18th ACM Conference on Embedded Networked Sensor Systems, SenSys 2020
SDGs
Publisher
ACM
Type
conference paper