The Development Of The Digital Satellite Antenna Controller With Function Of Remote Control

With the arrival of the information society, the development of modern educational technology whose core is computer technology is changing our way of production, daily life, work and learning deeply. In order to meet the basic demands to the talent of information society, we must speed up the development of interactive multimedia distance education information system. Satellite television broadcasting has played a decisive role in the building of long-distance education, therefore vigorous development of the satellite television broadcasting system appears to be particularly important. Satellite communications is rapid, convenient, flexible and of the richness information resources, that is self-evident. But people put forward new requisition for ground receiving system of the satellite with the transition from analog signals to digital signals. How to make the aerial aim at the satellite in shorter time and guarantee the reliability and speediness of receiving digital signals is the problem that need to be solved urgently. On the other hand, most satellite antenna control rooms locate at the mountains or the top suburban high-rise , the poor working environment and more electromagnetic radiation have seriously affected the value of good health, so the development of a high-reliability satellite antenna automatic tracking control system with function of remote control is of great significance to the protection of the value of good health and quality assurance of the quality of satellite communications.The present domestic satellite reception antenna controllers are basically designed according to the extreme value following principle. The satellite antenna controllers can aim at the satellite according to the carrier waver signals through driving the antenna to circumvolve repeatedly. This can meet the demands to the system that receives the analog signals only, but can't realize aiming at satellite accurately when it receives the digital signals. So we need to make a corresponding improvement . The digital satellite antenna control system with function of remote control that the thesis studies changes the signal quality voltage of the digital satellite receiver into the reference signal of antenna controlling, thus makes the antenna aim at the satellite accurately. Meanwhile we can find out the excursion rules of satellites and store them, then make the antenna aim at the satellite adaptively according to the stored data. This thesis mainly expounds the design theory, main function, main technology, specific implementation methods and using method of the system. Main contents are as follows:The first chapter, introduction. It introduces the significance of the subject and the arrangements of main research work.The second chapter, the integral design scheme of the digital satellite antenna control system with function of remote control. It expounds the theoretical basis and the key technology of the system, then we put forward the integral design scheme of the system on the basis of them accordingly.The third chapter, the hardware design of the digital satellite antenna control system with function of remote control. It includes the hardware configuration of the system, the selection of the key apparatus, the hardware circuit design and hardware security technology .The fourth chapter, the software design of the digital satellite antenna control system with function of remote control. It introduces the specific design of the procedures of 51 serials MCU and serial communication software design, points out the anti-jamming software measures.The fifth chapter, the design and implementation of the wireless control module. It analyzes wireless transmitting module deeply, expounds structure and function of the module, introduces the structure of the hard system of the wireless terminal controller, describes specific design of the wireless communication protocol and CRC check in the application of the wireless data transmission.The sixth chapter, the instruction and prospect of the system. It summarizes the performance of the whole system simply, and explores the possibility of further improvement.The thesis analyzes the method of adaptive tracking control of satellite antenna according to satellite antenna theory, automatic control theory and modern communication theory, and design the system from the two ways of hardware and software. Manual antenna adjustment is time consuming and strenuous, this system can overcome these disadvantages. Meanwhile the system aims at the satellite expeditiously, has high precision and friendly human-computer interaction interface. This study can directly serve in the modern long-distance education system and the measure and control realm of satellite antenna, which is applicable to the antenna laboratory of the institutes. It has high use and popularization use. It promotes the development of Chinese satellite communication significantly, its economic and social benefits are very significant.