Pulse or digital communications – Equalizers – Automatic
Reexamination Certificate
2006-06-21
2009-12-29
Fan, Chieh M (Department: 2611)
Pulse or digital communications
Equalizers
Automatic
C375S350000, C375S231000, C375S354000, C375S229000, C370S495000, C370S503000, C714S746000, C714S758000
Reexamination Certificate
active
07639738
ABSTRACT:
A communication system includes a channel shortening filter to reduce intersymbol interference and facilitate recovery of communications. The channel shortening filter preferably includes a energy concentration filter that optimizes SNR or SINR or other performance criterion and a impulse response tail canceller filter that eliminates energy or, equivalently, cancels coefficients outside the allowed delay-spread window for the channel. Preferably the filters are calculated using signal decomposition.
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Acorn Technologies, Inc.
Fan Chieh M
Orrick Herrington & Sutcliffe LLP
Puente Eva Y
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