Time evolution of frequency components In a chaotic digital signal

Martín Pereda, José Antonio and González Marcos, Ana (2001). Time evolution of frequency components In a chaotic digital signal. In: "Algorithms and Systems for Optical Information Processing V", 29/07/2001, San Diego, CA, USA.

Description

Title: Time evolution of frequency components In a chaotic digital signal
Author/s:
  • Martín Pereda, José Antonio
  • González Marcos, Ana
Item Type: Presentation at Congress or Conference (Article)
Event Title: Algorithms and Systems for Optical Information Processing V
Event Dates: 29/07/2001
Event Location: San Diego, CA, USA
Title of Book: Proceedings of SPIE
Date: 13 November 2001
Volume: 4471
Subjects:
Freetext Keywords: Chaos ; Feedback ; Optical logic ; Receivers ; Time-frequency analysis
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (1MB) | Preview

Abstract

The type of signals obtained has conditioned chaos analysis tools. Almost in every case, they have analogue characteristics. But in certain cases, a chaotic digital signal is obtained and theses signals need a different approach than conventional analogue ones. The main objective of this paper will be to present some possible approaches to the study of this signals and how information about their characteristics may be obtained in the more straightforward possible way. We have obtained digital chaotic signals from an Optical Logic Cell with some feedback between output and one of the possible control gates. This chaos has been reported in several papers and its characteristics have been employed as a possible method to secure communications and as a way to encryption. In both cases, the influence of some perturbation in the transmission medium gave problems both for the synchronization of chaotic generators at emitter and receiver and for the recovering of information data. A proposed way to analyze the presence of some perturbation is to study the noise contents of transmitted signal and to implement a way to eliminate it. In our present case, the digital signal will be converted to a multilevel one by grouping bits in packets of 8 bits and applying conventional methods of time-frequency analysis to them. The results give information about the change in signals characteristics and hence some information about the noise or perturbations present. Equivalent representations to the phase and to the Feigenbaum diagrams for digital signals are employed in this case.

More information

Item ID: 23101
DC Identifier: http://oa.upm.es/23101/
OAI Identifier: oai:oa.upm.es:23101
Official URL: http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=891745
Deposited by: Biblioteca ETSI Telecomunicación
Deposited on: 16 Mar 2014 10:12
Last Modified: 21 Apr 2016 21:31
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM