Recently, video classification attracts intensive research efforts. However, most existing works are based on framelevel visual features, which might fail to model the temporal information, e.g. characteristics accumulated along time. In order to capture video temporal information, we propose to analyse features in frequency domain transformed by discrete Fourier transform (DFT features). Frame...

A technique that uses clipping has been recently proposed to reduce the peak-toaverage-power ratio (PAPR) in orthogonal frequency divisional multiplexing (OFDM) signals. The technique uses a discrete Fourier transform (DFT) based filter to reduce out-ofband (OOB) power after the interpolated baseband OFDM signal is clipped. In this paper, the technique is applied to HIPERLAN2 to reduce the PAPR...

A novel Hilbert-twin (H-twin) method is introduced as an alternative method for the computation of the resonant frequency for exponentially damped free decays embedded in noise. We also present the comparison among the following methods used to compute the dynamic elastic modulus in solids: the parametric OMI (Optimization in Multiple Intervals), the Yoshida-Magalas (YM) interpolated discrete F...

The quality of energy produced in renewable energy systems has to be at the high level specified by respective standards and directives. The estimation accuracy of grid signal parameters is one of the most important factors affecting this quality. This paper presents a method for a very fast and accurate amplitude and phase grid signal estimation using the Fast Fourier Transform procedure and m...