Clock recovery phase detector

Details Clock recovery phase detector Clock recovery phase detector

1992-07-10

1995-10-03

Chin, Stephen

Pulse or digital communications

Synchronizers

Phase displacement, slip or jitter correction

375326, 327159, 327299, 327350, H03D 324

Patent

active

054558476

ABSTRACT:
A phase detector for symbol clock recovery in a digital communications system determines the phase error of a local symbol clock from the symbol rate of a transmitted signal by sampling the transmitted signal to obtain a first sample at a fraction of a symbol period after the symbol clock and to obtain a second sample at an equal fraction of a symbol period before the symbol clock, and determining a phase error equal to the difference between a function of the magnitude of the first sample and a function of the magnitude of the second sample. The function is preferably the square of the magnitude or the logarithm of the magnitude of the samples.

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