A Research On The Key Technology Of Satellite Signal Quality Monitoring

With the development of science and technology,the application of satellite navigation and positioning is becoming more and more popular.At present,the BeiDou Global Navigation System is steadily being built and developed in our country.Satellite signal quality monitoring is an important link in the process of satellite navigation system design and operation.Not only can it detect possible satellite problems by monitoring the signal quality of ground or on-orbit satellite payloads,but it can also provide the means and support for the signal design of the satellite navigation system and the on-orbit test of the key technology.Therefore,not only is it of great help for fault analysis of ground and on-orbit satellite payload,but it also provides the basis for the realization of high-precision navigation system.In this thesis,the new system signal in modern navigation system is introduced firstly,and the monitoring indicator for the new system satellite signals are also put forward and improved.Next,the thesis introduces the basic structure and workflow of signal quality monitoring receiver,and it also improves acquisition and tracking module.Finally,the monitoring receiver is used to monitor the various indicators of Galileo 0208 orbiting satellite,and the monitoring results are analyzed to find out the possible problems of the satellite and to provide a convenient satellite maintenance in the future.The main work of this thesis will focus on the following aspects:1)It studies the characteristics of the new system navigation signals including BOC signal and BOC derived signal,and their time-domain waveform and power spectral density curve are described in detail;2)It establishes the indicator system and the corresponding algorithm structure of the new system satellite signal,and some signal quality monitoring indicators have been proposed and improved in order to monitor and analyze the satellite signal of the new system.3)It designs the satellite signal quality monitoring receiver to realize the satellite signal monitoring and analysis,and the acquisition and tracking module are also improved.4)It completes the monitoring of various indicators of Galileo 0208 orbiting satellite,and the monitoring results are analyzed to find out the possible problems of the satellites.