Methods of complex signal analysis for testing radio receiving equipment

In this paper, we consider methods for evaluating the quality of signals from special purpose digital radio receivers. We talk about the issues of increasing the reliability of the equipment due to the expansion of methods for complex analysis of signals during testing. The article presents methods and algorithms for identifying distortions of signals based on the methods for wavelet analysis. Considered the existing technique for determining the harmonic distortion of a signal when testing digital radio-receiving equipment of a special purpose, based on the Fourier transform. Its shortcomings are shown in the analysis of rapidly changing signals. As an alternative, a technique for analyzing non-stationary signals based on wavelet transform was proposed, and a new criterion for estimating the harmonic distortion of signals, the distortion coefficient, was introduced. © 2021 Federal Informational-Analytical Center of the Defense Industry. All rights reserved.