Design And Implementation Of The Hardware Platform In The Satellite Ranging System

Satellite monitoring system is an information channel between the satellite andground stations, it opened an observation window for people to ensure satellite can orbitand run at expected attitude, complete the required space missions. The ranging system isan important part of monitoring and control system for the measurement of the distancebetween the satellite and ground station, and satellite velocity. Commonly used coherencetechnique to complete the ranging, the principle of this method is relatively simple, but thehardware part of the design will be lack of flexibility, high complexity and larger size.Non-coherent ranging technology can reduce implementation complexity and ensureperformance reliability, and the hardware design is more convenient.After the demonstration program and analytical work, decided to use the ARM+FPGA hardware core platform to complete the development of the system. ARM moduleis responsible for the information processing unit which consists of embedded chipAT91SAM9261, Ethernet circuit, CAN communication circuit, the serial circuit, theinternal and external interface circuit used to complete the system self-test, the solver ofranging and velocimetry algorithm, exchange FPGA data capabilities. FPGA module isresponsible for the baseband processing unit which consists of EP2C70F672, A/D circuit,D/A circuit, operational amplifier circuits, power conversion circuits and othercomponents to complete ranging and velocimetry baseband processor in the non-coherentspread-spectrum monitoring and control communication system.Firstly, starting from the basic principle of satellite ranging, shows the overallframework of the entire system, the choice of chips, and analyzes the modular of hardwaresystem, design of various communication interfaces and storage interfaces, and the wholesystem power design. Finally, use system testing and results analysis to verifyfunctionality and stability of the hardware platform.