Channel Characterisation and System Design for Sub-Surface CommunicationsBased on the author's PhD thesis, this book is a theoretical study of subterranean radio communication, with the focus on methods that depend primarily on the penetration of electromagnetic fields through the ground. Through the earth communication using e m fields specifically magnetic induction plays a role in search and rescue systems used in the mining industry. It is also used for borehole telemetry, pipeline location and by cavers and pot