3585298 is referenced by 25 patents and cites 3 patents.

A timing recovery circuit at a receiver provides fine and coarse phase correction in the receiver's local oscillator. The coarse correction adds pulses to the local oscillator's output after it has been divided in frequency whenever the reduced frequency pulses appear outside of a timing window created from a pilot signal sent with the information signal. The fine phase correction adds or deletes pulses in the output of the local oscillator whenever the timing pulses, derived from the output of the coarse phase corrector, do not coincide with data threshold crossings of the information signal. The receiver's timing pulses train is the reduced frequency pulse train resulting from dividing the frequency output of the course phase corrector. The invention herein described was made in the course of Air Force Contract F30602-67C-0168.

Title
Timing recovery circuit with two speed phase correction
Application Number
04/889,113
Publication Number
3585298
Application Date
December 30, 1969
Publication Date
June 15, 1971
Inventor
Liberman Richard A
Assignee
International Business Machines Corporation
IPC
H04l 07/00
H04L 07/08
H04L 07/33
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