Modem with improved clock control and method therefor

Details Modem with improved clock control and method therefor Modem with improved clock control and method therefor

1987-08-31

1989-01-10

Pellinen, A. D.

Pulse or digital communications

Repeaters

Testing

275111, 275118, H04L 516, H04L 704

Patent

active

047979003

ABSTRACT:
Modems such as type 201 modems are subject to pattern sensitivity problems caused primarily by different group delay characteristics for the patterns. The method of this invention minimizes such problems by determining different clock phase positions for group delayed patterns and uses same when such patterns are being received. A normal clock phase is determined during training and is used when patterns without substantial group delay are being received.

REFERENCES:
patent: 4504802 (1985-03-01), Heatherington
patent: 4559634 (1985-12-01), Hochschild
patent: 4644561 (1987-02-01), Paneth et al.

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