Caos aplicado a sistemas de espectro esparcido

Abstract

Spread Spectrum (SS) Systems are the subject of these thesis. In this systems the useful signal is masked to get a broad band spectrum, it means a spectrum wider than that of the signal. This masking procedure uses a pseudo random digital signals (pseudo noise) and may be motivated by different reasons. Each particular case has specific statistical requirements to be fulfilled by the pseudo noise. In this thesis chaos is used to generate the pseudo random noise. Three application fields are mainly studied: digital communications (spread spectrum CDMA), improvement of electromagnetic compatibility (EMC) and digital filtering in power sources.