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SYSTEM AND METHOD FOR COMMUNICATING DATA USING CONSTANT ENVELOPE ORTHOGONAL WALSH MODULATION WITH CHANNELIZATION

  • US 20100014559A1
  • Filed: 07/18/2008
  • Published: 01/21/2010
  • Est. Priority Date: 07/18/2008
  • Status: Active Grant
First Claim
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1. A radio device, comprising:

  • a transmitter unit comprisinga modulator for generating M-PAM (M-Pulse Amplitude Modulation) communications symbols containing communications data;

    a Fast Walsh Transform (FWT) circuit for orthogonally encoding and band-spreading the communications symbols, or channels, using the Fast Walsh Transform;

    a guard time circuit for cyclically extending the output of Fast Walsh Transform by a guard time; and

    a frequency modulation circuit that frequency modulates the communications symbols wherein a constant envelope orthogonal Walsh modulated communications signal is generated having a plurality of orthogonal waveforms each forming a separate Walsh communications channel.

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