Method and apparatus for increased communication channel...

Details Method and apparatus for increased communication channel... Method and apparatus for increased communication channel...

2011-01-11

2011-01-11

Wang, Ted M (Department: 2611)

Pulse or digital communications

Transmitters

Antinoise or distortion

C375S224000, C375S285000, C375S295000

Reexamination Certificate

active

07869540

ABSTRACT:
Methods and apparatus are disclosed for increased pre-emphasis for clock-like data patterns to compensate for channel distortions. One aspect of the invention compensates for channel distortions by evaluating a data pattern to be transmitted; determining if the data pattern satisfies one or more predefined criteria defining a clock-like data pattern; and generating a pre-emphasis level for the clock-like data patterns that is higher than a pre-emphasis level for the data patterns that do not satisfy the one or more predefined criteria. For example, a predefined window size can be defined for determining if the data pattern satisfies the one or more predefined criteria defining the clock-like data pattern. In one exemplary implementation, the higher pre-emphasis level is generated for one or more predefined data patterns. A table can optionally be accessed to determine the pre-emphasis level based on the data pattern.

REFERENCES:
patent: 2007/0025488 (2007-02-01), Ho et al.
patent: 2007/0268984 (2007-11-01), Abel et al.

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