Pulse or digital communications – Repeaters – Testing
Patent
1983-05-20
1985-11-19
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375107, H04B 712
Patent
active
045546681
ABSTRACT:
A radio communications system comprising at least one master station and a plurality of slave stations in two-way frequency-hopping communication therewith. For telephony, speech is digitally encoded. Digital data is transmitted in packets using successive bursts at different frequencies separated by intervals of silence. Each slave station has its own frequency-hopping pattern independent of the patterns of the other slave stations but sharing a common pool of available frequencies. The master stations are capable of generating any of the slave station patterns instantly. The master stations broadcast network time information for synchronization purposes, and the slave station patterns are determined by a combination of a slave station identification number and network time.
REFERENCES:
patent: 3836726 (1974-09-01), Wells et al.
patent: 3973081 (1976-08-01), Hutchins
patent: 4023103 (1977-05-01), Malm
patent: 4066964 (1978-01-01), Costanza et al.
patent: 4415770 (1983-11-01), Kai et al.
patent: 4423505 (1983-12-01), Greig
IEEE Transactions of Vehicular Technology, vol. VT-27, No. 4, Nov. 1978, IEEE N.Y. by G. R. Cooper, "A Spread-Spectrum Technique for High Capacity Mobile Communications", pp. 264-275.
Butin Henri
Deman Pierre
"Thomson-CSF"
Chin Stephen
Griffin Robert L.
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