Cyclostationary models for communications signals have been shown in recent years to ooer many advantages over stationary models. Stationary models are adequate in many situations, but they cause important features of the signal to be overlooked. One such important feature is the correlation between spectral components that many signals exhibit. Cyclostationary models allow this spectral correl...

A simple analytical method is presented that shows some potential for application to the problem of extracting attenuation and backscatter coefficients in an inhomogeneous atmosphere from the return signal of a monostatic single-wavelength lidar system. The method assumes the validity of the single-scattering lidar equation and a power law relationship between backscatter and attenuation. For o...

A simple method for calculating the effects of optical geometry on photothermal lens signals is shown. This method is based on calculating cumulative electric-field phase shifts produced by a series of Gaussian refractive-index perturbations produced by the photothermal effect. Theoretical results are found for both pulsed-laser and continuous Gaussian laser excitation sources and both single- ...

A cyclostationary Gaussian linearization method is formulated for investigating the time average response of nonlinear system under sinusoidal signal and white noise excitation. The quantitative measure of cyclostationary mean, variance, spectrum of mean amplitude, and mean power spectral density of noise are analyzed. The qualitative response behavior of stochastic jump and bifurcation are inv...

This paper proposes a new analytical approach to explore the 21 cm signal from cosmic dawn, based on halo model, which allows for fast evaluation of signal. study complements previous semi-numerical techniques and raises hopes complete reliability inference, given very efficient models dawn.

An analytical review of recent publications in the area of digital speech signal processing is presented. The aim of the given paper is the analysis of these publications, where Artificial Neural Networks (ANNs) were successfully employed. Numerous methods of ANNs employment are discussed due to identify when and why they are reliable alternative to the conventional adaptive signal processing t...

Short picosecond pulse propagation in semiconductor optical amplifiers (SOAs) has been widely studied for applications in optical signal processing and optical communications areas. Even though it is possible to fully numerically integrate differential equations describing the dynamics of SOAs, such implementations may not provide adequate insight into the device operation. We propose a systema...

Abstract – Performance degradation of an analog FM and PAL-G signal due to Spread Spectrum (SS) interference is investigated. An analytical expression between RF TV protection ratio (CIR) and baseband unweighted Signal-toNoise ratio (SNRV), for co-channel spread spectrum and noise interference, is derived. Also, we expressed the audio frequency signal-to-noise ratio (AF SNR) output due to SS ov...

This paper presents an information-driven audiovisual signal acquisition approach. This approach has several advantages: users are encouraged to assist in signal acquisition; available sensors are managed based on both signal characteristics and users’ suggestions. The problem formulation is consistent with many well-known empirical approaches widely used in previous systems and may provide ana...