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Adaptive noise filtering and equalization for optimal high speed multilevel signal decoding

  • US 7,035,361 B2
  • Filed: 07/15/2003
  • Issued: 04/25/2006
  • Est. Priority Date: 07/15/2002
  • Status: Expired due to Fees
First Claim
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1. A system for processing digital signals comprising symbols propagated according to a period, the system comprising:

  • a signal conditioning filter comprising a first stage for mitigating degradations of a digital signal that occur according to a first time scale, the first stage comprising a linear tapped-delay line filter tuned to the first time scale, the first time scale comprising a fraction of the period at which the symbols are propagated, and a second stage for removing signal distortions that occur according to a second time scale, the second stage comprising a linear tapped-delay line filter tuned to the second time scale, the second time scale being different than the first time scale and comprising a magnitude at least equal to the period at which the symbols are propagated; and

    a signal integrity unit for controlling the signal conditioning filter by maximizing fidelity of the digital signals.

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