Measuring Channel State Information by Underwater Acoustic Gliders

Underwater gliders are useful for persistent ocean observation at relatively large scales due to their power saving propulsion paradigm. Underwater gliders can keep silence for the most of time, making them fit for underwater acoustic observation and communications. In this paper, we make use of those advantages for measuring the channel state information from an acoustic source to hydrophone-equipped underwater gliders. Studies on the acoustic propagation are conducted from the 2020 South China Sea Experiment (SCSEx20), and further compared with the results calculated by an acoustic model, which show that the transmission loss is in good agreement with the measurements collected by the underwater gliders.