The Structure of the Receiving Path of the Automatic Dependent Surveillance-Broadcast Message Processing Module

The purpose of the research is to study and search for options for the structure of the receiving path of the automatic dependent surveillance-broadcast message system.

Research methods are based on structural-parametric synthesis of measuring and computing facilities. Variants of the architecture of automatic dependent surveillance-broadcasting systems with a detailed composition of the receiving, converting and processing parts have been created. The study of the options for the scheme of the receiving path of the electronic module for receiving messages of automatic dependent observation-broadcasting showed that the best (in terms of gain) is the option with a sequential two-stage "gain-filtering" part, and the most reliable (in terms of the operating voltage level) is the option with an integrated processing circuit signal.

Results. Small astronautics is one of the most promising areas for the development of high-tech products. Small spacecraft as autonomous research mini-laboratories or robotic systems are used to solve problems of remote sensing of the Earth, organize space communication systems, conduct scientific experiments in space, etc. one area, the functions of which are expanded through the use of small spacecraft as additional transmitting and receiving means. Operating in an orbit of 400-500 km, a grouping of small spacecraft provides reception of messages of automatic dependent observation-broadcasting and their further processing in order to highlight the flight characteristics of aircraft (coordinates, speed, course, altitude, etc.). The obtained variants allow us to detail the architecture of the module and the structure of the receiving path, depending on the selected target indicators (gain coefficients, signal-to-noise ratio, application power).

Conclusion. The analysis of the module architecture options made it possible to detail the structural organization of the electronic module for receiving messages as part of the blocks for receiving, digitizing the signal and decrypting ADS-B messages. It is show, that the most critical block of signal reception should be evaluated in terms of gain, signal / noise, application power).

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