Abstract : Singular random signals are characterized by the fact that their values at each time are singular random variables, which means that their distribution functions are continuous but with a derivative almost everywhere equal to zero. Such random variables are usually considered as without interest in engineering or signal processing problems. The purpose of this paper is to show that very simple signals can be singular. This is especially the case for autoregressive moving average (ARMA) signals defined by white noise taking only discrete values and filters with poles located in a circle of singularity introduced in this paper. After giving the origin of singularity and analyzing its relationships with fractal properties, various simulations highlighting this structure will be presented. Index Terms ARMA models, fractals, stochastic signals.
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IEEE Trans. Sign. Proc, 2005, 53, pp.499 - 504
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Bernard Picinbono, Jean-Yves Tourneret. SINGULAR RANDOM SIGNAL. IEEE Trans. Sign. Proc, 2005, 53, pp.499 - 504. 〈hal-01707533〉



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