—This paper studies the frequency estimation of twodimensional (2-D) harmonics in presence of multiplicative and additive noise. We construct a cyclic covariance matrix using a class of cyclic covariance of the 2-D harmonics. Exploiting the shift-invariance structure of the signal subspace, we extend ESPRIT to estimate the frequency pairs of 2-D harmonics in multiplicative and additive noise. ...

In harmonic plus noise model (HNM), each segment of speech is modeled as two bands: a lower "harmonic" part represented as amplitudes and phases of the harmonics of a fundamental and an upper noise part using an all-pole filter excited by random white noise, with dynamically varying band boundary. HNM based synthesis can be used for good quality output with relatively small number of parameters...

Usually a STATCOM is installed to support power system networks that have a poor power factor and often poor voltage regulation. It is based on a power electronics voltagesource converter. Various PWM techniques make selective harmonic elimination possible, which effectively control the harmonic content of voltage source converters. The distribution systems have to supply unbalanced nonlinear l...

-This paper presents a software filter for fast estimation of harmonic and frequency components of a power system voltage or current signal corrupted by noise with low signal to noise ratio (SNR). This new algorithm is based on an objective function often used in independent component analysis for robust tracking under impulse noise conditions. Instead of choosing the step size η and the parame...

Recent theoretical predictions demonstrating large enhancements of second-harmonic diffraction through the control of surface harmonic composition when the surface-plasmon polariton ~SPP! is excited on a corrugated silver surface have been investigated experimentally for the specular order. Interpretation of the mechanism of enhancement in terms of a three-step selective scattering process invo...

A new cepstrum-based technique is developed in order to provide an alternative means of estimating the harmonics-tonoise ratio in voice signals. The geometric mean harmonics-tonoise ratio (GHNR) is defined as the mean of the individual spectral (i.e. at specific frequency locations) harmonics-tonoise ratios in dB. A heuristic development of the method treats the harmonic spectrum (in dB) of voi...

This year, we expanded our investigation of sound analysis to look at a range of different sound 'scenes', including overlapping conversations, ambient everyday sound, and music. In each case, the goal is to abstract useful information similar to that which a human listener would perceive, and in particular to deal successfully with the issues raised by multiple, overlapping sound sources. Our ...

-This paper presents an adaptive filter for fast estimation of harmonic and frequency components of a power system voltage or current signal corrupted by noise with low signal to noise ratio (SNR). This new algorithm is based on an objective function often used in independent component analysis for robust tracking under impulse noise conditions. Instead of choosing the step size η and the param...

Harmonics in electrical networks occur as a result of non-linear loads. It has an effect on power factor improvement using capacitors in terms of increasing the unbalance current between units. In addition, the occurrence of resonance and result in the exit of capacitors from service by the protective relays to protect the units from collapse. The main objective of this research is the real-tim...

Fundamental frequency (F0) estimation is important in speech processing such as speech coding, synthesis, recognition and so on. A present F0 estimation method performs well under clean condition, however the performance deteriorates significantly in noisy environment. As a result, robust F0 estimation against additive noise is demanded. We have previously proposed F0 estimation methods based o...