1 research outputs found
Dynamic Channel Selection in UAVs through Constellations in the Sky
Wireless communication between an unmanned aerial vehicle (UAV) and the
ground base station (BS) is susceptible to adversarial jamming. In such
situations, it is important for the UAV to indicate a new channel to the BS.
This paper describes a method of creating spatial codes that map the chosen
channel to the motion and location of the UAVs in space, wherein the latter
physically traverses the space from a given so called "constellation point'' to
another. These points create patterns in the sky, analogous to modulation
constellations in classical wireless communications, and are detected at the BS
through a millimeter-wave (mmWave) radar sensor. A constellation point
represents a distinct n-bit field mapped to a specific channel, allowing
simultaneous frequency switching at both ends without any RF transmissions. The
main contributions of this paper are: (i) We conduct experimental studies to
demonstrate how such constellations may be formed using COTS UAVs and mmWave
sensors, given realistic sensing errors and hovering vibrations, (ii) We
develop a theoretical framework that maps a desired constellation design to
error and band switching time, considering again practical UAV movement
limitations, and (iii) We experimentally demonstrate jamming resilient
communications and validate system goodput for links formed by UAV-mounted
software defined radios.Comment: Accepted to GLOBECOM 201