Telecommunications – Transmitter and receiver at separate stations – Single message via plural carrier wave transmission
Patent
1987-08-21
1989-10-03
Yusko, Donald J.
Telecommunications
Transmitter and receiver at separate stations
Single message via plural carrier wave transmission
455 34, 455 51, 455 56, 455 71, 34082550, 379 62, H04B 100, H04B 700
Patent
active
048722057
ABSTRACT:
When the disclosed frequency-hopping communication system is initially enabled, it detects another system operating within range by listening for a predefined radio frequency of a fixed duration. When that particular frequency is detected, the system knows that a master system is operating within range and is utilizing a first predetermined group of communication frequencies and, consequently, selects a second, third, etc. predetermined group of communication frequencies. If the particular radio frequency is not detected, the system becomes the master system, selects the first predetermined group of communication frequencies for intra-system communication and begins transmitting the predefined radio frequency to indicate its master status.
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American Telephone and Telegraph Company
AT&T Information Systems Inc.
Caccuro John A.
Queen Tyrone
Yusko Donald J.
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