Adaptive methods for chaotic communication systems

James B. Kadtke; Jeffrey S. Brush

doi:10.1117/12.162672

18 November 1993 Adaptive methods for chaotic communication systems

James B. Kadtke, Jeffrey S. Brush

Proceedings Volume 2038, Chaos in Communications; (1993) https://doi.org/10.1117/12.162672
Event: SPIE's 1993 International Symposium on Optics, Imaging, and Instrumentation, 1993, San Diego, CA, United States

Abstract

We describe several existing and two new nonlinear dynamics (NLD)-based communication schemes, addressing the shortcomings and advantages of each. One new method is based on modulating the parameters of one or more chaotic generating systems with the signal(s) of interest. The output of the resulting nonstationary chaotic system is transmitted across the channel, and the signals are extracted via a continuous adaptation of system coefficients. The other novel method involves injecting the signal of interest as dynamic or feedback noise into the chaotic generating system. The noisy output is transmitted, and the dynamics of the generating system are estimated at the receiver. These dynamics are used to generate short term prediction errors, which are proportional to the original dynamic noise if the recovered system coefficients are reasonably accurate. Both methods have particular application to radio frequency (rf) communications, where spectral noise and frequency selective fading of signal power are real problems.

Citation Download Citation

James B. Kadtke and Jeffrey S. Brush "Adaptive methods for chaotic communication systems", Proc. SPIE 2038, Chaos in Communications, (18 November 1993); https://doi.org/10.1117/12.162672

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