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Viterbi decoder with reduced metric computation

  • US 5,844,947 A
  • Filed: 12/23/1996
  • Issued: 12/01/1998
  • Est. Priority Date: 12/28/1995
  • Status: Expired due to Term
First Claim
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1. A method for determining a plurality of branch metrics at a symbol instant that are comprised of autocorrelation terms and cross correlation terms, including the steps of generating components of the autocorrelation terms, storing the components of the autocorrelation terms, generating components of the cross correlation terms, storing the components of the cross correlation terms, characterized by:

  • selecting predetermined ones of the autocorrelation components and the cross correlation components, andcombining the selected autocorrelation components and cross correlation components in a predetermined manner to produce a branch metric.

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