Shaped signal spaces in a simultaneous voice and data system

  • US 5,475,713 A
  • Filed: 06/14/1993
  • Issued: 12/12/1995
  • Est. Priority Date: 06/14/1993
  • Status: Expired due to Term
First Claim
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1. A method for transmitting comprising the steps of:

  • a) selecting a data symbol as a function of a data signal, where each data symbol represents a different one of a number of regions of an N-dimensional signal space, and each data symbol is associated with a different N-dimensional signal point in the N-dimensional signal space;

    b) selecting an N-dimensional signal point as a function of an applied signal, where the signal point is selected from the N-dimensional signal space;

    c) adding the signal space coordinates of the selected data symbol and the selected N-dimensional signal point to provide a resultant signal point;

    where each resultant signal point is taken from the region associated with the data symbol and where each one of the number of regions has a non-square shape.

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