Timing phase control apparatus and timing phase control method

Details Timing phase control apparatus and timing phase control method Timing phase control apparatus and timing phase control method

1997-07-22

1999-12-14

Chin, Stephen

Pulse or digital communications

Transceivers

Modems

375231, 375232, H04B 138, H03K 5159

Patent

active

060027126

ABSTRACT:
The present invention discloses a timing phase control apparatus which is particularly suitable for use in a modem used for very high speed data transmission employing a metallic line. The timing phase control apparatus includes a timing phase extracting portion to extract timing phase information from an input signal, a timing phase control filter portion to make a timing phase control to the input signal depending upon the timing phase information from the timing phase extracting portion through filter processing using a coefficient operation having a preset impulse response characteristic, and a filter processing coefficient determining portion to determine a coefficient used for the filter processing in the timing phase control filter portion depending upon the timing phase information and information about an approximate expression of the impulse response characteristic. An accuracy of a tap coefficient can be improved while reducing an amount of information about the tap coefficient, which should be stored.

REFERENCES:
patent: 4694469 (1987-09-01), Kaku et al.
patent: 4847880 (1989-07-01), Kamerman et al.
patent: 5247541 (1993-09-01), Nakai

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