Análisis de un esquema novedoso de comunicaciones caóticas con OFDM y su aplicación en comunicaciones seguras

Abstract

The broadband nature and noise-like appearance of chaotic signals makes them attractive for spread spectrum and secure communications. Although many chaotic communication systems have been proposed, they usually show a poor performance under realistic channel conditions. In this paper, we propose to combine a novel chaotic modulation technique with a conventional OFDM system to provide simultaneously protection against interception and inmunity against channel distortion. The chaotic modulator/demodulator is described, three different chaotic maps are studied, and the tradeoff between performance and security is explored. Computer simulations confirm the good performane of the proposed approach.