Shaped signal spaces in a simultaneous voice and data system

Details Shaped signal spaces in a simultaneous voice and data system Shaped signal spaces in a simultaneous voice and data system

H - Electricity

04

L

H04L 27/32 (2006.01) H04J 7/00 (2006.01) H04L 27/34 (2006.01)

Patent

CA 2125510

-13- Shaped Signal Spaces in a Simultaneous Voice and Data System Abstract In a simultaneous voice and data communications system, a voice signal is mapped into an N-dimensional signal space constellation as a vector, and added to a reference signal point, i.e., a data symbol, where the data symbol is selected from a constellation of data symbols every signaling interval as a function of a data signal. The constellation signal space is further divided into a number of shaped regions, where each region is associated with a different one of the data symbols. The shape of each region is selected as a function of the characteristics of the voice, or audio, signal. In particular, each region illustratively has a rectangular shape.

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