АНАЛIЗ ЕНЕРГЕТИЧНИХ ХАРАКТЕРИСТИК ПОХИБКИ ВIДНОВЛЕННЯ ПРИ ДИСКРЕТНОМУ ПРЕДСТАВЛЕННI СИГНАЛIВ

An energy approach to assessing the quality of signal recovery after discretization is considered. A method for analyzing the power spectral density of the interpolation error for four basic methods is proposed. The relationships between the normalized mean square error (NMSE) and the normalized sampling rate (NSR) on a logarithmic scale are established. Empirical coefficients are derived for a quick assessment of the quality of recovery without full mathematical modeling. It is shown that the transition zone between the methods is at NSR = 1.8–2.2, which allows optimizing the choice of the interpolation algorithm. The results of the study are of practical importance for the design of electronic warfare systems, in particular when developing digital signal processing receivers in radio interception and radio reconnaissance complexes. The established criteria for selecting the interpolation method allow optimizing the ratio between the accuracy of reconstruction of complex radio signals and the computing resources of onboard electronic warfare systems in real-time conditions.