We model non stationary signals by assuming that the phase and the amplitude are both a polynomial function of time on a short finite interval. The used functions are normalized Legendre polynomial.â€¦ (More)

Parameter estimation for closely spaced or crossing frequency trajectories is a difficult signal processing problem, especially in the presence of both nonlinear amplitude and frequency modulations.â€¦ (More)

The problem of estimating nonstationary signals has been considered in many previous publications. In this paper we propose an alternative algorithm in order to accurately estimate AM/FM signals.â€¦ (More)

This article proposes an optimal pole placement whose only parameter to tune is the natural frequency of the dominant closed loop pole. This simple tuning is optimal with respect to an IAE criterionâ€¦ (More)

A simple necessary condition for an interval polynomial to have all its zeros in the open unit disc is given. This condition provides a simple and quick test to detect many unstable discrete systems.

In trending and pattern recognition, the signal comprises a series of samples having a characteristic sequence, the so-called signature, repeatable from one measurement to another. Most of theâ€¦ (More)