Signal equalization and data recovery with non-linear digital th

Details Signal equalization and data recovery with non-linear digital th Signal equalization and data recovery with non-linear digital th

1997-11-07

2000-04-04

Pham, Chi H.

Pulse or digital communications

Receivers

Automatic baseline or threshold adjustment

375286, 327 37, H04L 2506, H04L 2534, G01R 2902

Patent

active

060470321

ABSTRACT:
In a digital communication system, analog equalization and data recovery are provided with non-linear digital feedback at the receiver, to overcome frequency domain distortion imposed by the communications channel. Digital information from the clock and data recovery circuit is non-linearly filtered and then fed back so as to modulate the threshold of a slicer which receives the signal which has been analog equalized. Thereby any shortcomings in the equalization, slicer, or clock and data recovery are overcome by adjusting the slicer threshold at each clock cycle in response to the recovered clock and data signals.

REFERENCES:
patent: 5113391 (1992-05-01), Gupta et al.
patent: 5132797 (1992-07-01), Citta et al.
patent: 5450441 (1995-09-01), Harris et al.
patent: 5832039 (1998-11-01), Rijns et al.

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