Using high-order cumulants to recognize digital types of radio signal modulation

Recognition of types of modulation of radio signals is an important task solved in radio engineering systems for various purposes. In radio monitoring tools, information about the type of modulation is used to identify unauthorized sources of radio emission and measure their parameters. In electronic warfare systems, it is used when choosing a more effective type of interference. The article substantiates the relevance of improving methods for recognizing digital types of modulation. It is shown that mixed cumulants of higher orders can be used as modulation features for recognizing types of modulation. Analytical expressions are provided for calculating mixed cumulants up to the tenth order inclusive through the values of mixed moments. The values of mixed cumulants are given for radio signals with the most common types of digital modulation. Recommendations have been developed for the synthesis of algorithms for recognizing the type of modulation based on cumulant analysis.