SPECTRAL ANALYSIS OF ELECTRICAL SIGNALS BASED ON NUMERICAL METHODS
Keywords:Spectral analysis, periodic and aperiodic signals, electrical pulses, numerical methods, Mathcad application package, rectangular pulse, spectral density.
In the context of informatization of all spheres of human activity, scientists are very interested in the physical foundations of computer technology. One of these main issues is the application of electrical signals in computer networks. With the help of electrical signals, messages (text, video, etc.) are encoded and transmitted over distances. Information can be contained in the signal amplitude, frequency, and phase. For this reason, spectral analysis is an important stage in the study of electrical signals used in computer technology. The paper presents the results of spectral analysis of various electrical signals. Spectral analysis was performed using numerical methods. The periodic sequence of a rectangular pulse is investigated using the Mathcad. The amplitude and phase spectra of the signals were obtained. The ways of calculating the spectral density of single impulses on the basis of numerical methods are determined.