Stolarczyk, 2002 - Google Patents
Emergency and operational low and medium frequency band radio communications system for underground minesStolarczyk, 2002
- Document ID
- 1384350443006424178
- Author
- Stolarczyk L
- Publication year
- Publication venue
- IEEE Transactions on Industry Applications
External Links
Snippet
A minewide low and medium-frequency radio system has been developed and installed in coal and metalliferous mines. The radio system utilizes two robust radio signal transmission modes to establish underground radio coverage areas. The seam transmission mode occurs …
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/155—Ground-based stations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/14—Relay systems
- H04B7/15—Active relay systems
- H04B7/185—Space-based or airborne stations; Stations for satellite systems
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