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Multi-viterbi receive channel decoder

  • US 8,090,059 B1
  • Filed: 05/01/2007
  • Issued: 01/03/2012
  • Est. Priority Date: 05/01/2006
  • Status: Active Grant
First Claim
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1. A detection circuit comprising:

  • an impulse response filter configured to generate an equalized signal based on an input data signal;

    a first Viterbi detector configured to generate at least one preliminary decision signal including preliminary non-return-to-zero data estimates based on the equalized signal;

    a plurality of filters configured to (i) receive the at least one preliminary decision signal and (ii) generate a filtered signal based on the at least one preliminary decision signal; and

    a second Viterbi detector (i) arranged in series with the first Viterbi detector and (ii) configured to generate a final decision signal including final non-return-to-zero estimates based on a sum of (i) a delayed version of the equalized signal and (ii) the filtered signal.

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