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SYSTEM AND METHOD FOR ORDERWIRE MODULATION IN A MULTIPOINT-TO-POINT ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING SYSTEM

  • US 20080043704A1
  • Filed: 10/27/2007
  • Published: 02/21/2008
  • Est. Priority Date: 02/06/1995
  • Status: Abandoned Application
First Claim
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1. A method for communication, the method comprising:

  • receiving baseband user data;

    modulating the baseband user data onto a first plurality of parallel streams based on a first modulation constellation;

    modulating non-user data onto a second plurality of parallel streams based on a second modulation constellation, wherein the first modulation constellation provides a higher bit-rate than the second modulation constellation;

    applying an inverse Fourier transform to the first plurality of parallel streams and the second plurality of parallel streams to produce a set of complex time-domain samples;

    transmitting a radio frequency transmission signal based on the set of complex time-domain samples; and

    receiving a waveform comprising a plurality of spectrally overlapping carrier signals from at least two of a plurality of remote units, wherein the plurality of spectrally overlapping carrier signals are modulated using an inverse Fourier transform.

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