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Recent research has validated a proof-of-concept system for real-time underground tomography using wireless signal networks. Though models have been constructed to characterize wireless signal propagation through geo-media, there lacks a thorough investigation of antenna performance under geo-property variations. In this paper, we quantitatively show that soil condition variations affect antenna functional...
This letter presents our experimental endeavor to characterize underground magneto-inductive channels. Specifically, a range of experiments are conducted in realistic underground environments, and the measurement data are compared with channel models established in prior publications. The channel model incorporates the impact of soil conductivity, is found in better agreement with the measurement...
The Wireless Signal Networks (WSNs) use the signal strength variation of wireless nodes in the host medium as the main indicator of events or physical property changes in the medium. With the concept and application of the Underground Wireless Signal Networks (UWSNs) where the host medium is a soil, the real-time global subsurface monitoring of wireless underground sensor networks can be achieved,...
An accurate and simple radio propagation model for underground low-power devices such as wireless sensor nodes is introduced and its performance is evaluated by real wireless sensor nodes. The proposed model describes underground radio signal propagation that is proportional to where represents the distance and represents the attenuation constant reflecting the...
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