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Turbo decoder with decision feedback equalization

  • US 6,307,901 B1
  • Filed: 04/24/2000
  • Issued: 10/23/2001
  • Est. Priority Date: 04/24/2000
  • Status: Expired due to Term
First Claim
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1. A decoder that provides intersymbol interference equalization in decoding a received turbo coded signal, the decoder comprising:

  • a turbo decoder with two recursion processors connected in an iterative loop, the turbo decoder for decoding information and coded bits of the signal; and

    an equalizer feedback loop coupled to the turbo decoder and adapted to receive hard decision values for the coded and information bits from the turbo decoder, the feedback loop includes a decision feedback equalizer that inputs the hard decision values along with estimates for channel characteristics derived and updated from the previous frame to calculate an intersymbol interference correction signal, the decision feedback signal applies a correction to the next input of the signal before being input to the turbo decoder so as to minimize the intersymbol interference.

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