Do chaos-based communication systems really transmit chaotic signals?

Autor(es)

Candido, Renato ^[1] ; Soriano, Diogo C. ^[2] ; Silva, Magno T. M. ^[1] ; Eisencraft, Marcio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, BR-05508 Sao Paulo - Brazil

^[2] Univ Fed ABC, Santo Andre, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Signal Processing; v. 108, p. 412-420, MAR 2015.
• Citações Web of Science: 7

Resumo

Many communication systems based on the synchronism of chaotic systems have been proposed as an alternative spread spectrum modulation that improves the level of privacy in data transmission. However, depending on the map and on the encoding function, the transmitted signal may cease to be chaotic. Therefore, the sensitive dependence on initial conditions, which is one of the most interesting properties for employing chaos in telecommunications, may disappear. In this paper, we numerically analyze the chaotic nature of signals modulated using a system that employs the Ikeda map. Additionally, we propose changes in the communication system in order to guarantee that the modulated signals are in fact chaotic. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 14/04864-2 - Análise espectral de sinais caóticos com aplicações em comunicações
• Beneficiário: Marcio Eisencraft
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 12/24835-1 - Algoritmos adaptativos, combinações e aplicações em desconvolução
• Beneficiário: Magno Teófilo Madeira da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Regular