Method and apparatus for deskewing WDM data transmitted through

Details Method and apparatus for deskewing WDM data transmitted through Method and apparatus for deskewing WDM data transmitted through

1985-04-04

1987-06-30

Atkinson, Charles E.

Excavating

360 26, G06F 1100

Patent

active

046776184

ABSTRACT:
When a byte of digital data is transmitted through a dispersive medium using frequency or wavelength division multiplexing (WDM) techniques, individual bits in the byte are normally delayed different amounts of time. This is referred to as bit skew. WDM apparatus is described along with a system for deskewing WDM data received after transit through a dispersive medium. Two bits in a given byte of data are detected. The relative times of arrival of the remaining bits in a byte are predicted using the relative delay between the two detected bits and the known frequency-related dispersion characteristics of the transmission medium. Certain bits in each received byte may be delayed using clock delay lines or registers to reduce the amount of time skew between the various bits in a byte.

REFERENCES:
patent: 3264622 (1966-08-01), Gerlach
patent: 3427591 (1969-02-01), Nishioka
patent: 3728679 (1973-04-01), McIntosh
patent: 4024498 (1977-05-01), McIntosh
patent: 4497056 (1985-01-01), Sugamori

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