Analysis of Trellis Code Modulation Technology in Satellite High Speed Data Transmission System

Satellite remote sensing systems are now widely used in military and civilian fields, and are developing rapidly. However, because the remote sensing receiver of the ground satellite often requires a lot of time and energy to debug the satellite in orbit during the development process, it is also very important to study the satellite image transmission system composed of the ground receiver and the supporting simulator. In this paper, the grid code modulation technology in the satellite high-speed data transmission system is researched. Based on the literature, the satellite high-speed data transmission system and the related theory of the grid code modulation technology are understood, and then the satellite high-speed data transmission system is designed. Finally, the trellis coding modulation technology in the system is tested. The test results show that when the bit error rate is 0.3, the new concatenated code in this paper has a coding gain of 2dB than the ordinary convolutional code, and the NASA proposed NASA Compared with the code, there is also a coding gain of 1dB.