Scherbina K. Development of Methods of Signal Filtering Quality Improvement in Autonomous Radio Systems and Devices of Their Practical Implementation

The object of the research - Doppler signal processing in narrowband tracking filters of autonomous radio systems based on synchronized controlled oscillators with forced frequency tuning. The objective of the research - to increase noise immunity, dynamic accuracy, sensitivity and speed-of-response of aircraft. The methods of the research - conclusions, scientific statements and recommendations involving the fundamental provisions of the statistical theory of radio systems, the principles of mathematical and software modeling are developed. The practical significance of the research - the developed methods and practical implementation schemes of automatic regulation of controlled oscillator synchronizing level. The novelty of the research - it has been improved the mathematical model of Doppler signal; it has been further developed the scientific and technical aspects of tracking systems synthesis using synchronized controlled oscillator with extended capture range and hold-in range of synchronization; it has been perfected the frequency discriminator circuit; it has been first proposed the physical model of Doppler tracking filter from the existing ones in use of controlled oscillator circuit with external synchronization and forced frequency tuning; it has been developed the schemes of practical implementation of automatic level control of synchronization signal in Doppler tracking filter controlled oscillator. The level of implementation - industrial. The field of use - radio technical systems of various application.