Timing recovery method and system

Details Timing recovery method and system Timing recovery method and system

1992-06-05

1995-04-04

Bocure, Tesfaldet

Pulse or digital communications

Synchronizers

375 75, 375239, 327 91, 327155, H04L 700

Patent

active

054043794

ABSTRACT:
An apparatus and method for receiving a continuous time pulse amplitude-modulated passband signal is disclosed. The pulse amplitude modulated signal is periodically sampled by a local clock to generate received samples. A convolution of the received samples and an impulse response function is evaluated at a particular value of a phase difference variable to derive corrected samples. Using a narrow transmission band filter, a periodic signal is derived from the corrected samples. The periodic signal has a period equal to a symbol period of the pulse-amplitude modulated signal. Successive samples in each period of the periodic signal are compared to determine if the corrected samples lag or are ahead of optimal samples. If the corrected samples lag or are ahead of the optimal samples, the phase difference variable used to evaluate the convolution is varied by a fixed discrete stepsize.

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