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Generalized noise cancellation in a communication channel

  • US 5,621,768 A
  • Filed: 11/29/1994
  • Issued: 04/15/1997
  • Est. Priority Date: 11/29/1994
  • Status: Expired due to Term
First Claim
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1. A noise canceler for processing a channel output signal composed of a signal plus noise to produce a filtered channel output signal, the noise being a linear combination of first and second noise components, the canceler comprisinga parallel arrangement of a plurality of cascade networks, each cascade network being responsive to the signal and the noise to produce an output signal, wherein each cascade network includes:

  • an inner product filter circuit having a filter characteristic determined from a first eigenvector equation corresponding to minimization of noise in the first noise component, in series with a second filter having a characteristic determined from a second eigenvector equation related to the first eigenvector equation, andmeans for combining the outputs of the second filters to produce the filtered channel output signal.

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