Symbol timing recovery using fir data interpolators

Details Symbol timing recovery using fir data interpolators Symbol timing recovery using fir data interpolators

1994-11-15

1996-06-04

Chin, Stephen

Pulse or digital communications

Synchronizers

Synchronizing the sampling time of digital data

375232, 375373, H04L 700

Patent

active

055241263

ABSTRACT:
A symbol timing recovery method and device which aligns the received data with a free-running symbol clock such that the aligned data sampling error is minimized. The symbol timing recovery process consists of detecting the timing phase error between the transmitters symbol clock and the receiver symbol clock, filtering the error, and then using the filtered error signal to control a block which changes the phase of the data relative to the timing reference signal. A data zero-crossing phase error detector drives a loop filter whose most significant bits form the address of the FIR coefficient ROM, which allows the FIR to interpolate data at sub-symbol resolution. The FIR coefficients are then used to synchronize the received data with the receiver clock.

REFERENCES:
patent: 4285061 (1981-08-01), Ho
patent: 4411000 (1983-10-01), Kustka
patent: 4571732 (1986-02-01), Pirani et al.
patent: 5018166 (1991-05-01), Tjahjadi et al.
patent: 5311546 (1994-05-01), Paik et al.
patent: 5425057 (1995-06-01), Paff

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