Research And Implementation Of Satellite Signal Detection And Tracking Technology

The automatic detection and tracking system of satellite in motion integrates signal processing,multi-sensor data processing,motor control and other technologies.Beacon receiver is an important equipment for tracking satellite in motion.Traditional beacon uses complex microwave circuit to capture and track beacon signal.Beacon receiver has complex structure and high technical difficulty,and its design complexity and high cost limit the further popularization of mobile communication.It is of great significance to develop a high-performance and low-cost satellite signal detection and tracking system for the popularization of communication in motion.This paper designs a satellite signal detection and tracking system based on DVB-S2 tran smission structure,which can be used for communication in motion.The signal detection system is based on the carrier signal,and uses the high frequency head device to realize the recognition of the satellite signal;at the same time,the high frequency head can be used as the down conversion module of the signal detection system to convert the signal to the intermediate frequency;after that,the digital processing chip STM32F103 is used to process and track the carrier to noise ratio,which can realize the accurate detection and tracking of the satellite with carrier signal;at the same time,this paper introduces the design of the signal detection system The coning algorithm of signal tracking is optimized,and the tracking performance of the coning algorithm is optimized by using the mean filtering method,so as to realize the stable real-time tracking of satellite signal.In this paper,the software and hardware design and implementation of satellite signal detection system and tracking system are completed.The test results show that the initial acquisition time of the system is less than or equal to 60 s;when there is an obstacle,the system can achieve instantaneous acquisition;when the time of satellite loss is less than 10 min,the acquisition time is less than 15 s;when the loss time is more than 10 min,the acquisition time is less than 60 s.The test results show that the tracking system can quickly respond to the change of satellite signal strength,adjust the antenna beam direction,and ensure the real-time smooth communication link.This performance is equivalent to that of traditional beacon.On the premise of meeting the above performance indicators,the design process avoids complex high-frequency circuit design,and the cost of R&D and devices is lower,which largely solves the problems of complex design and poor versatility of signal detection and tracking system of communication in motion satellite.