| |
Space systems integrate all input and output components capable of forming a communication module. They are located in the ground segment of the operations center and in the space segment on board the satellite. This, in turn, enables the control of space operations and other systems that support data distribution for applications. Since space missions collect huge amounts of scientific data, measurements, and images, high-speed transmission is of great importance. Issues related to information loss, interference during transmission, and the volume of data packets (frames) that can be sent deserve special attention. Given this, the requirements for the reliability of a single symbol during transmission are increasing significantly. In recent years, intensive research has been conducted to solve the problems of ensuring accurate transmission of information without distortion and to eliminate various types of interference in satellite communication systems. This research is based on the principle of creating command and measurement systems. Based on this principle, a new algorithm is being developed for evaluating signal parameters in the radio link of a command and measurement system, which allows selecting a particular radio link channel by first analyzing the interference environment not only at different speeds, but also using different coding methods for both received and transmitted data. During the research, various operating modes of the receiver were formalized, which supports the parallel operation of several channels using different signal-code structures, which allows for a wide range of data transmission speeds. Based on the results of modeling various modes of transmitter operation, it was found that the results obtained are consistent with the capabilities of using an adaptive data reception and transmission algorithm that supports automatic channel selection based on the data coding method and speed. It has been shown that the use of this method of information exchange between ground equipment and onboard equipment using a transmission speed selection algorithm, as well as various signal-code structures, provides not only significant time savings, but also a significant gain in the reliability of received and transmitted data compared to the traditional method, in which speeds are switched by commands in complex interference conditions.
Keywords:receiver, transmitter, information exchange methods, signal-code structures, radio link, ratio of useful signal to interference, command and measurement systems.
|
LEGAL
INFORMATION:
