Метод підвищення продуктивності корелограмного оцінювання спектральної густини потужності випадкових сигналів

Abstract

The method of increase of productivity of estimation of spectral density of power (SDP) of random signals at the expense of reduction of computational complexity of procedures of digital processing of investigated signals is offered in the work. The choice and substantiation of the methodology of digital evaluation of SDP signals is performed. It is proved that the correlogram methodology of SDP estimation under the condition of the same volume of processed signal samples is characterized by higher quality factor in comparison with direct estimation methods. At the same time, the application of the fast Fourier transform (FFT) technique to calculate the autocorrelation function of the signal creates conditions for improving the performance of correlogram methods for estimating SDP. Therefore, the correlogram methodology of fast digital estimation of SDP of random signals is applied in the work.