Through-the-earth emergency radio system

There is provided a Through the Earth Emergency Radio (TER) method and apparatus for creating a communications link that can penetrate the earth or other thick, solid barriers. The communication link is used to connect mobile radios or other conventional wireless devices located below ground and on...

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Bibliographische Detailangaben
Hauptverfasser:	Kwasniok, Peter, Puzakov, Vladimir, Roper, Michael James
Format:	Patent
Sprache:	eng
Schlagworte:	ANTENNAS, i.e. RADIO AERIALS BASIC ELECTRIC ELEMENTS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION WIRELESS COMMUNICATIONS NETWORKS
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Beschreibung
Zusammenfassung:	There is provided a Through the Earth Emergency Radio (TER) method and apparatus for creating a communications link that can penetrate the earth or other thick, solid barriers. The communication link is used to connect mobile radios or other conventional wireless devices located below ground and on the surface. The through the earth communication link uses a multi-carrier modulation method that minimizes the impact of AC power line noise by locating each carrier between the harmonic frequencies of the AC power line noise.