【作者】 陈力；

【导师】 杨灵；

【作者基本信息】 华中科技大学 ， 电子与通信工程， 2012， 硕士

【摘要】 卫星测控系统是卫星和地面站之间的一条信息通道，它为地面指挥控制人员打开了一个观测窗口，保证卫星能够按照预计的轨道和姿态运行，完成规定的航天任务。测距系统是测控系统的一个重要组成部分，用于卫星和地面站之间距离的测量以及卫星运动速度的测量。测控系统常使用相干技术来完成测距，这种方法原理较为简单，但是硬件部分设计缺乏灵活性，复杂度高并且体积较大。而非相干测距技术在保证性能可靠性的情况下能降低实现复杂度，在硬件设计上更加方便。经过方案论证和大量的分析工作，决定采用ARM+FPGA为核心的硬件平台来完成系统的开发。ARM模块负责的信息处理单元由嵌入式芯片AT91SAM9261、以太网电路、CAN通信电路、串口电路、内外部接口等电路组成，操作系统采用VxWorks，用来完成系统自检，测距测速算法的解算，以及和FPGA的数据交换等功能。FPGA模块负责的基带处理单元由Cyclone II系列的EP2C70F672、A/D电路、D/A电路、运放电路、电源转换电路等组成，在非相干扩频测控通信体制下，完成测距测速的基带处理，并且采用并行总线和ARM进行通信。本文首先从卫星测距的基本原理出发，展示了整个系统的总体框架，介绍了主要芯片的选择，然后对硬件系统进行模块化分析，详细说明了各个通信接口和存储接口的设计，以及整个系统的电源模块设计，最后通过系统测试和结果分析验证了硬件平台的功能和稳定性良好。更多还原

【Abstract】 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.更多还原