Method and apparatus for synchronizing modem transmission by con

Details Method and apparatus for synchronizing modem transmission by con Method and apparatus for synchronizing modem transmission by con

1993-12-03

1997-07-15

Chin, Wellington

Pulse or digital communications

Synchronizers

Synchronization failure prevention

375222, 327141, H04L 704

Patent

active

056489935

ABSTRACT:
A transmission synchronizing apparatus and method of a modem, in which a phase difference from a change point of an internal timing signal to a change point of a transmission timing signal is detected as a reference phase difference at the time of pull-in, based on a request to transmit from an external device. After pull-in, in a stationary communicating state, a phase difference is obtained from a change point of the internal timing signal to a change point of the transmission timing signal as a measured phase difference. The measured phase difference is controlled to coincide with the reference phase difference.

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"Rapid Communications," C. D. Ridley et al., Journal of Physics E. Scientific Instruments, vol. 19, No. 1, Jan. 1986, Bristol, pp. 83-85.

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