Optical communications transmitter and receiver

Details Optical communications transmitter and receiver Optical communications transmitter and receiver

1992-11-10

1995-02-28

Chin, Stephen

Pulse or digital communications

Synchronizers

Frequency or phase control using synchronizing signal

370 48, 370 99, 370106, 375364, 375342, 375286, H04L 2538

Patent

active

053944429

ABSTRACT:
An improved digital communications system is disclosed in which synchronization information is transmitted with the data. A start pulse, having a duration different than the other pulses in the transmitted digital data signal is used to mark the beginning of the frame of digital data. Preferably, a midpoint pulse is also transmitted with the start pulse to mark the midpoint of the frame to facilitate the generation of a local clock signal. Bit positions within the transmitted signal are sampled by sampling pulses which are generated by digital timers having time intervals keyed to the start and midpoint pulses.

REFERENCES:
patent: 3430204 (1969-02-01), Milford
patent: 3961137 (1976-06-01), Hutt et al.
patent: 4413336 (1983-11-01), Chaillie et al.
patent: 4589120 (1986-05-01), Mendala

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