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System and methods for precursor cancellation of intersymbol interference in a receiver

  • US 6,912,250 B1
  • Filed: 07/27/2000
  • Issued: 06/28/2005
  • Est. Priority Date: 11/12/1999
  • Status: Expired due to Term
First Claim
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1. For use in a receiver capable of receiving from a transmission channel an incoming stream of known symbols and unknown symbols distorted by intersymbol interference (ISI), an apparatus for reducing a precursor ISI signal comprising:

  • a decision feedback equalizer capable of receiving said incoming stream of distorted known symbols and distorted unknown symbols and generating a sequence of detected symbols; and

    a known symbol generator capable of generating a copy of a first known symbol prior to an estimation of said first known symbol by said decision feedback equalizer, wherein said decision feedback equalizer uses said copy of said first known symbol to reduce a first precursor ISI signal in a second symbol transmitted prior to said first known symbol.

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