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Trellis coded modulation employing lower dimensionality convolutional encoder

  • US 5,706,312 A
  • Filed: 03/31/1997
  • Issued: 01/06/1998
  • Est. Priority Date: 10/11/1994
  • Status: Expired due to Term
First Claim
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1. A method of N-dimensional trellis coded modulation for encoding a digital signal, the method comprising the step of:

  • generating a sequence of N-dimensional symbols as a function of the digital signal using an N'"'"'-dimensional convolutional encoder, where N>

    N'"'"'≧

    1, said encoder being used to generate for each of a plurality of N-dimensional signal intervals, a plurality of groups of outputs, each said group of outputs being a function of a respective different group of inputs, the N-dimensional symbols comprising J P-dimensional signal points and the digital signal having an integer number of bits per each P-dimensional signal point.

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