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Chaotic communication system and method using modulation of nonreactive circuit elements

  • US 6,980,656 B1
  • Filed: 05/24/1999
  • Issued: 12/27/2005
  • Est. Priority Date: 07/17/1998
  • Status: Expired due to Term
First Claim
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1. A method of transmitting information, comprising the steps of:

  • (1) generating a chaotic carrier signal that causes a voltage to oscillate chaotically about a first equilibrium point in a current-voltage phase space of a circuit that exhibits a current-voltage characteristic curve on which the first equilibrium point falls; and

    (2) changing, in response to an information signal, a non-reactive resistive value in the circuit and thereby causing the first equilibrium point to shift to a shifted first equilibrium point in the current-voltage phase space,wherein the circuit exhibits a piecewise-linear current-voltage characteristic comprising three linear segments, two of the linear segments having a first slope in the phase space and the third linear segment having a second slope in the phase space; and

    wherein step (2) comprises the step of changing either the first slope or the second slope but not both slopes in response to the information signal.

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