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Secure modulation and demodulation

  • US 20080181402A1
  • Filed: 01/10/2008
  • Published: 07/31/2008
  • Est. Priority Date: 04/07/2003
  • Status: Active Grant
First Claim
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1. A transmitter for securely transmitting a signal, including:

  • an input interface for receiving the signal; and

    a nonlinear keying modulator configured to encrypt the signal using a nonlinear keying modulation technique; and

    wherein the nonlinear keying modulator has an associated nonlinear keying demodulator with a transfer function that is an inverse of the nonlinear transfer function and that can be used to decrypt a nonlinear keying modulation encrypted signal.

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