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Frequency domain decision feedback equalizer

  • US 7,212,569 B1
  • Filed: 04/11/2003
  • Issued: 05/01/2007
  • Est. Priority Date: 06/28/2002
  • Status: Expired due to Fees
First Claim
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1. A method for processing a received time domain signal representing a sequence of channel symbols, the method comprisingmatched-channel filtering a frequency domain representation R(f) of the received signal to generate a frequency domain representation XMF(f),linear equalizing said frequency domain representation XMF(f) to generate a linear equalized frequency domain representation XLE(f),combining said frequency domain representation XMF(f) of the received signal with a frequency domain estimate ISI(f) of intersymbol interference in said representation XMF(f) to generate an ISI-mitigated frequency-domain representation XDFE(f) of said received signal, said estimate ISI(f) being a function of a frequency domain representation {circumflex over (X)}LE(f) of tentative decisions as to the channel symbols, said tentative decisions being formed as a function of said representation XLE(f), andgenerating final decisions as to the channel symbols as a function of said representation XDFE(f).

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