In this letter, we propose timing offset (TO) and carrier frequency (CFO) estimators for orthogonal time space modulation (OTFS). The proposed do not require any additional training overheads as they deploy the same pilot signal that is used channel estimation. Hence, no overhead required synchronization, thanks to periodic properties of in delay-time domain. Our TO estimator finds start each O...

The notions of time, frequency, and scale are generalized using concepts from unitary operator theory and applied to time-frequency analysis, in particular the wavelet and short-time Fourier transform orthonormal bases and Cohen's class of bi-linear time-frequency distributions. The result is an infinite number of new signal analysis and processing tools that are implemented simply by prewarpin...

Abstract In this study, we examine the asymmetric short- and long-run spillover among commodities using realized variances semivariances calculated through 5-min trading data of commodity futures. doing so, apply time frequency domain generalized error variance decomposition approaches build a network connectedness. Our findings indicate low inter-group connectedness, distinct group clustering,...

Sound elements were studied for a six strings sape, traditional instrument. The frequency was evaluated using spectrum and time plane. PicoScope oscilloscopes Adobe Audition version 3 used to record the acoustic spectra. Fast Fourier Transform (FFT) analysis spectra (using PicoScope) (TFA) spectrograms Audition). identified partial frequencies up 10th overtone. sape have an pattern with constan...

It is known that, interference classification plays an important role in protecting the authorized communication system and avoiding its performance degradation hostile environment. In this paper, problem for frequency hopping discussed. Considering possibility of presence multiple interferences system, order to fully extract effective features from received signals, linear bilinear transform b...