Modified gain non-causal channel equalization using...

Details Modified gain non-causal channel equalization using... Modified gain non-causal channel equalization using...

2007-04-17

2007-04-17

Ghebretinsae, Temesghen (Department: 2611)

Pulse or digital communications

Equalizers

Automatic

C375S345000

Reexamination Certificate

active

10652333

ABSTRACT:
A modified gain system and method are provided for non-causal channel equalization using feed-forward and feedback compensation. The method comprises: receiving a serial data stream first bit (present) input; comparing a second bit (past) value, received prior to the first bit input, to a third bit (future) value received subsequent to the first bit input; modifying the amplitude of the first bit input to compensate for the effect of the second and third bit values being equal; and, determining the value of the first bit input by comparing the amplitude modified first bit input to a Vopt threshold. When only one of the second and third bit values is a “1” value, a unity amplitude modifier is supplied. When the second and third bit values are a “1”, a low amplitude modifier is supplied. When the second and third bit values are a “0”, a high amplitude modifier is supplied.

REFERENCES:
patent: 5539774 (1996-07-01), Nobakht et al.
patent: 6031866 (2000-02-01), Oler et al.
patent: 6493329 (2002-12-01), Leung

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