The cyclic prefix is commonly used in the context of frequency domain equalization in DMT channels. In this paper we observe that it can be used in more general contexts and show its advantages in blind equalization, especially for non minimum phase channels.

This paper, presents a robust adaptive control method for a class of non-linear non-minimum phase systems with uncertainties. The development of the control method comprises of two steps. First, stabilization of the system is considered based on the availability of the output and internal dynamics of the system. The reference signal is designed to stabilize the internal dynamics with respect to...

The ground state of dense up and down quark matter under local and global charge neutrality conditions with β-equilibrium has at least four possibilities: normal, regular 2SC, gapless 2SC phases, and mixed phase composed of 2SC phase and normal components. The discussion is focused on the unusual properties of gapless 2SC phase at zero as well as at finite temperature.

| In this paper we study robustness and sensitivity properties of a sampled-data feedback system with a Generalized Sampled-data Hold Function (GSHF). We argue that shifting nonminimum phase zeros using GSHF control can lead to diiculties unless the zero is outside the closed loop bandwidth.

Closed phase covariance (CP) analysis is a glottal inverse filtering method which estimates the vocal tract during the glottal closed phase. Since closed phase durations are typically short, the vocal tract computation with linear prediction is vulnerable to the covariance frame position. This study proposes a modified CP algorithm in which a DC-gain constraint is imposed in optimizing the line...

When inverse filtering speech signals, many theoretical approximations and practical difficulties are involved. Therefore, care must be taken when interpreting inverse filter results. In this paper it is studied what constraints are needed to obtain reliable separation of source and filter parameters. Inverse filter results are presented based on a Robust ARMA analysis method running in a pitch...

It is crucial for many methods of inverse filtering that the time domain information of the glottal source waveform is known, e.g. the location of the instant of glottal closure. It is often the case that this information is unknown and/or cannot be determined due to e.g. recording conditions which can corrupt the phase spectrum. In these scenarios, alternative strategies are required. This pap...

Color superconductivity of QCD at finite density, temperature and flavor asymmetry is studied within an approximation which the interaction is modeled upon four–fermion interactions. We calculate the thermodynamic potential in the socalled NJL-type model and study the phase structure at finite density, temperature and flavor asymmetry. We find that a mixed phase appears at sufficiently large fl...

In this paper, we present a novel method for inverse filtering a two dimensional (2-D) signal using phase-based processing techniques. A 2-D sequence can be represented by a sufficient number of samples of the phase of its Fourier transform and its region of support. This is exploited to perform deconvolution. We examine the effects of additive noise and incomplete knowledge of the point spread...

The present study addresses comparison of two analysis methods of voice production, inverse filtering and videokymography (VKG). Speech data were collected from two male speakers using sustained phonation during laryngoscopy (sound corresponding approximately to the vowel /ä/). The type of phonation was varied between breathy, normal, and pressed. From the waveforms given by inverse filtering, ...