Autor(es)

Candido, Renato ^[1] ; Eisencraft, Marcio ^[1] ; Silva, Magno T. M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Politecn, BR-05508010 Sao Paulo - Brazil

• Tipo de documento: Artigo Científico
• Fonte: DIGITAL SIGNAL PROCESSING; v. 33, p. 42-49, OCT 2014.
• Citações Web of Science: 5

Resumo

Many communication systems applying synchronism of chaotic systems have been proposed as an alternative spread spectrum modulation that improves the level of privacy in data transmission. However, due to the lack of robustness of chaos synchronization, even minor channel imperfections are enough to hinder communication. In this paper, we propose an adaptive equalization scheme based on a modified normalized least-mean-squares (NLMS) algorithm, which enables chaotic synchronization when the communication channel is not ideal. As an example of application, this scheme is used to recover a binary sequence modulated by a chaotic signal generated by the Henon map. Simulation results show that the modified NLMS can successfully equalize the channel in different scenarios. (C) 2014 Elsevier Inc. 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