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Partial-response-channel precoding

  • US 5,311,547 A
  • Filed: 02/03/1992
  • Issued: 05/10/1994
  • Est. Priority Date: 02/03/1992
  • Status: Expired due to Term
First Claim
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1. Apparatus comprisingmeans for selecting, in response to input data, a sequence of signal points from a predetermined base constellation,means for combining each selected signal point with a feedback signal to provide a sequence of combined signal points, said feedback signal being a predetermined function of at least one previously provided one of the combined signal points, said base constellation and said function being such that ones of said combined signal points are signal points of said base constellation and the others are signal points of minimally non-overlapping lattice translates of said base constellation, andmeans for providing a transmit signal which represents said combined signal points, all of the combined signal points which are minimally non-overlapping lattice translates of one another being represented identically.

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