Method and apparatus for estimating clock slew and carrier trans

Details Method and apparatus for estimating clock slew and carrier trans Method and apparatus for estimating clock slew and carrier trans

1996-04-23

1998-12-15

Chin, Stephen

Pulse or digital communications

Synchronizers

375222, H04L 700, H04B 138

Patent

active

058504214

ABSTRACT:
The present invention helps derive accurate clock and carrier translation presets in the presence of noise and various line shapes. The invention provides an adaptive algorithm that optimizes the calculations of clock slew (.DELTA.T.sub.s) and frequency offset (.DELTA.f) over the specific line conditions encountered at each connection by choosing an optimal subset of the communication device's probing frequencies that minimizes the effect of line losses and noise.

REFERENCES:
patent: 4287597 (1981-09-01), Paynter et al.
patent: 5048054 (1991-09-01), Eyubogul et al.
patent: 5654982 (1997-08-01), Goodson et al.
International Telecommunications Union ITU-T V.34 Standard, entitled "A Modem Operating at Data Signalling Rates of up to 28,800 Bit/s etc.", Sep. 1994 edition, 63 pages.

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