| Channel Characterisation and System Design for Sub-Surface Communications Contributor(s): Gibson, David (Author) |
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ISBN: 1445769530 ISBN-13: 9781445769530 Publisher: Lulu.com OUR PRICE: $298.25 Product Type: Paperback Published: June 2010 |
| Additional Information |
| BISAC Categories: - Technology & Engineering | Engineering (general) |
| Physical Information: 0.63" H x 8.27" W x 11.69" (1.59 lbs) 300 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: Based 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-holers. Chapters describe propagation, antennas, and the design of transmitters and receivers. A figure of merit - the specific aperture - is introduced as an aid to antenna design. A crucial aspect of all systems is the signal to noise ratio, for which the strategy of noise-matching is introduced. The design of a wide-band low-frequency sounder is described, for channel evaluation using a non-ideal binary sequence. A method of calculating the inverse of a generalised sequence is described, for which cross-correlation results in a system identification signal. |