Baryshev V. Methods of Noise Immunity of Radiotechnical System Resonance Channels and Device of their Practical Implementation

Research object is process of Doppler signal processing in resonance channels of airborne radiotechnical devices. Research purpose is increase of noise immunity of maneuvering aircraft (МА) speed measurement channel. Research methods. The following methods have been applied: a heuristic approach to design and forming of Doppler frequency filter (DFF) and frequency discriminator (FD) algorithms, theoretical and numerical analyses in backgrounding the application and operability of the proposed DFF and FD; statistical synthesis and analysis in proving the effectiveness and advantages of the developed methods of noise immunity increase; experimental study that has shown a possibility of practical implementation of the developed methods. Scientific novelty of the results obtained. 1. It is the first time the filtering method that provides better noise immunity in the area of zero deviations not worse than in the area of large deviations has been proposed. 2. It is the first time the signal processing methods that have functional abilities close to optimal as well as high noise immunity and stability of a discriminatory characteristic in comparison to existing frequency discriminators have been proposed. 3. A possibility of creating FD with asymmetric (widened to one side) linear discriminatory characteristic is proven. Degree of results implementation: the results are introduced in a correspondent branch of science and industry. Practical value of the results obtained is in development of Doppler signal processing methods for wideband interference which allow ensuring the simplicity, high immediacy of tuning, steadiness and stability of technical characteristics of the developed DFF and FD. The thesis materials are used in the tutorial process of National Aerospace University named after M.Y. Zhukovsky “KhAI” in the courses “Signals and Processes in Radiotechnics”, “Radiotechnical Systems” (an act of use is available) and are implemented in Ukrainian State Centre of Radiofrequencies, Kyiv, at carrying out the Project “Research of Radiofrequency Resource Conversion Abilities in a Range of 800 MHz at the Expense of Improving Parameters of Electromagnetic Compatibility of Terminal Radars” (an act of implementation is available).