Channel equalization using frequency and phase compensation

Pulse or digital communications – Equalizers

Reexamination Certificate

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Details

C375S230000, C375S231000, C375S232000, C375S233000, C375S316000, C375S345000, C375S346000, C375S350000

Reexamination Certificate

active

08059705

ABSTRACT:
A system and method are provided for channel equalization using a combination of frequency and phase compensation. The method receives a serial data stream input, and parallel processes the data stream input through a first and second path. The first path has a first frequency response, and the second path has a second frequency response, higher than the first frequency response. Signals are combined from the first and second paths, creating a frequency compensated signal. Then, the frequency compensated signal is parallel processed through a third path having a first time delay, and a fourth path having a fourth time delay, greater than the third time delay. The signals from the third and fourth paths are combined, created a phase compensated signal. In one aspect, the phase compensated signal is amplified, creating a voltage limited output signal.

REFERENCES:
patent: 5557640 (1996-09-01), Chadwick
patent: 2004/0190661 (2004-09-01), Vrazel
patent: 2006/0057996 (2006-03-01), Petrovic et al.
patent: 2007/0053451 (2007-03-01), French et al.
patent: 2008/0170646 (2008-07-01), Sobchak et al.
patent: 2008/0279318 (2008-11-01), Bharitkar et al.
patent: 2010/0067567 (2010-03-01), Ghiasi

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