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High spectral efficiency data communications system using energy-balanced modulation

  • US 10,666,481 B2
  • Filed: 10/29/2018
  • Issued: 05/26/2020
  • Est. Priority Date: 10/27/2017
  • Status: Active Grant
First Claim
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1. A data communication method, the method comprising:

  • receiving input digital data;

    encoding the input digital data using a plurality of symbol waveforms wherein each of the plurality of symbol waveforms occupies a period of a composite encoded waveform and represents bits of the input digital data, each symbol waveform of the plurality of symbol waveforms having a first elliptical segment and a second elliptical segment of opposite polarity to a polarity of the first elliptical segment;

    wherein each symbol waveform is defined so that (i) a zero crossing from the first elliptical segment to the second elliptical segment is different for each of the plurality of symbol waveforms, and (ii) an energy of the first elliptical segment of the symbol waveform is substantially equal to an energy of the second elliptical segment of the symbol waveform;

    generating an encoded analog waveform from a representation of the composite encoded waveform.

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