Osipchuk A. Robust noise immunity methods and algorithms for estimation of information signal parameters in radio engineering systems

The dissertation is devoted to the analysis and development of interference immunity methods of estimation of information parameters signals of in radio engineering systems. Particular attention is paid to the analysis of interference immunity of signal processing methods of onboard radio receiving devices of navigation systems in high-frequency and low-frequency paths in the conditions of interference. In the work, an analysis was made of existing methods for evaluating the information parameters of signals in radio systems in order to identify promising directions for their development and improvement in conditions of complication of the electromagnetic environment. The main factors affecting the noise immunity and electromagnetic compatibility of radio systems were also considered. The main attention is paid to the processing of signals in radio engineering systems based on a statistical approach, namely the development of new algorithms for evaluating the information parameters of signals under the influence of both Gaussian and non-Gaussian interference. Based on the analysis, it was found that intermodulation interference poses a major threat to radio receivers. Such interferences are characteristic not only for radio engineering systems, but also for satellite communication systems, telecommunication systems of wireless communication. To study such interference, a simulation model of the intermodulation interference, which has an impulse character, was developed. An algorithm for estimating the phase of a harmonic signal under the action of an intermodulation interference is synthesized and a study of the proposed method by mathematical modeling is performed. The possibility of improving the frequency detector on the basis of the frequency estimation method is also considered and its research under the action of pulse interference against the background of Gaussian noise is carried out. The obtained scientific results should be used during the development and improvement of radio systems, as well as in the educational process.