Title :
On the correlation of non-jittered and chaotically-jittered PWM signals carrying maximum information
Author :
Rovatti, R. ; Callegari, S. ; Setti, G.
Author_Institution :
CEG-DEIS, Bologna Univ., Italy
Abstract :
We here address the problem of computing the correlation of a PWM signal that carries information and is possibly chaotically jittered in order to avoid high peaks in the power spectrum. A restricted analytical formula is given along with a more general semi-analytical procedure relying on a low-complexity Monte-Carlo estimation. Based on the developed tools, it is shown that the chaos-based frequency modulation of the timebase of the PWM signal is able to cancel the asymptotically periodic trend of the correlation thus reducing the impulsive part of the power spectrum.
Keywords :
Monte Carlo methods; chaos; correlation methods; electromagnetic compatibility; frequency modulation; jitter; pulse width modulation; EMC interference reduction; PWM signal timebase; asymptotically periodic trend cancellation; chaos-based frequency modulation; chaotically-jittered signals; general semi-analytical procedure; low-complexity Monte Carlo estimation; maximum information carrying PWM signals; nonjittered signals; power spectrum impulsive part reduction; power spectrum peaks; pulse width modulation; restricted analytical formula; signal correlation computation tools; Chaos; Costs; Filtering; Interference; Power conversion; Power generation; Pulse width modulation; Signal design; Signal processing; Switches;
Conference_Titel :
Circuits and Systems, 2002. ISCAS 2002. IEEE International Symposium on
Print_ISBN :
0-7803-7448-7
DOI :
10.1109/ISCAS.2002.1010369
