Pulse or digital communications – Repeaters – Testing
Patent
1986-08-06
1989-02-21
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375 93, 375 97, 375106, 370104, H04L 2706, H04J 306
Patent
active
048072540
ABSTRACT:
A carrier wave recovery system for a slotted ALOHA system is disclosed. In a time slot where a burst is not inputted, the frequency of oscillator means is locked to a mean value of carrier wave frequencies of bursts which were received in the past, thereby allowing a minimum of initial frequency offset to occur. A voltage controlled oscillator frequency is controlled at initial pull-in to an average frequency of the highest and lowest carrier wave frequencies of an input burst signal.
REFERENCES:
patent: 4561099 (1985-12-01), Atsugi et al.
patent: 4563767 (1986-01-01), Brandt
Griffin Robert L.
Huseman Marianne
NEC Corporation
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