We analyze the effects of noise on the power spectrum of pulse trains generated by a continuously operating passively mode-locked laser. The shape of the different harmonics of the power spectrum is calculated in the presence of correlated timing fluctuations between neighboring pulses and in the presence of amplitude fluctuations. The spectra at the different harmonics are influenced mainly by...

The last decade has seen a dramatic rise in renewable energy converters connected to the grid, consisting mostly of intermittent distributed generators on the medium or low voltage grid. Due to this evolution in energy transmission, improved monitoring and control of the distribution grid is becoming mandatory in order to efficiently integrate the new power sources and guarantee power quality, ...

In this paper we propose the MVDR method, which is based upon the Minimum Variance Distortionless Response (MVDR) spectrum estimation method, for modeling voiced speech. Developed to overcome some of the shortcomings of Linear Prediction models, the MVDR method provides better models for medium and high pitch voiced speech. The MVDR model is an all-pole model whose spectrum is easily obtained f...

The COST-277 speech database p. 100 Children's organization of discourse structure through pausing means p. 108 F0 and intensity distributions of Marsec speakers : types of speaker prosody p. 116 A two-level drive response model of non-stationary speech signals p. 125 Advanced methods for glottal wave extraction p. 139 Cepstrum-based estimation of the harmonics-to-noise ratio for synthesized an...

In this paper we study the effect that jitter and phase noise have on the precision of amplitude estimation of the harmonics of a periodic signal. The analysis carried out is applicable to both Three-Parameter Sine Fitting as well as Coherent Discrete Fourier Transform procedures. We consider the case where jitter and phase noise on the signal or sampling clock is small when compared with the s...

In recent years, active filters have been considered and developed for elimation of harmonics in power networks. Comparing with passive, they are smaller and have better compensating characteristics and resistance to line distortions. In this paper, a novel idea based on adaptive filter theory in presented to develop an active filter to eliminate the distortions of an arbitrary signal. Using th...

This paper presents a speech enhancement method based on the tracking and denoising of the formants of a linear prediction (LP) model of the spectral envelope of speech and the parameters of a harmonic noise model (HNM) of its excitation. The main advantages of tracking and denoising the prominent energy contours of speech are the efficient use of the spectral and temporal structures of success...