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Methodology and method and apparatus for signaling with capacity optimized constellations

  • US 9,385,832 B2
  • Filed: 09/19/2014
  • Issued: 07/05/2016
  • Est. Priority Date: 06/05/2007
  • Status: Active Grant
First Claim
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1. A digital communication system, comprising:

  • a transmitter configured to transmit signals to a receiver via a communication channel;

    wherein the transmitter, comprises;

    a coder configured to receive user bits and output encoded bits at an expanded output encoded bit rate using a code;

    a mapper configured to map said encoded bits to symbols in a phase shift keyed (PSK) symbol constellation;

    a modulator configured to generate a signal for transmission via the communication channel using symbols generated by the mapper;

    wherein the PSK symbol constellation is a geometrically spaced symbol constellation in which the phases of the constellation points are optimized for capacity using parallel decode capacity that provides a given capacity at a reduced signal-to-noise ratio compared to a PSK signal constellation that maximizes dmin.

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