【作者】 王崇博；

【导师】 周依林；

【作者基本信息】 中国科学院研究生院（上海微系统与信息技术研究所） ， 通信与信息系统， 2008， 硕士

【摘要】 低轨小卫星系统具有小型化、成本低、研制周期短等特点,在国民经济与国防建设中有很好的发展前景。正是这种良好的发展前景推动了小卫星及其相关技术的飞速发展。小卫星测控技术便是其中一项重要技术。小卫星测控技术是指对小卫星及其运载工具进行跟踪、测量和控制的专用技术。小卫星测控系统为遥控和遥测的统称。遥测是将一定距离外被测对象的参数,经过感受、采集,通过传输媒介送到接收地点并进行解调、记录、处理的一种测量过程。低轨卫星数字遥测接收机的主要目标是在卫星入境期间,接收卫星遥测下发的卫星状态数据,及时进行数据分析,了解卫星运行状态。项目需求为建立一个便携式的遥测接收机。项目选用TI公司的OMAP5912芯片,它是由TI应用最为广泛的TMS320C55x DSP内核与低功耗、高性能的ARM926EJ-S微处理器组成的双核应用处理器,广泛使用于当今流行的智能手机中。相比于使用两个单独ARM与DSP处理器的接收机,使用OMAP为主处理芯片的接收机体积更小,功耗更低。在此平台上,本文主要承担,即嵌入式操作系统软件和在此基础上的应用软件的研制。遥测接收机系统控制软件的研制包括:装载基于OMAP硬件平台的Boot Loader,用于引导Linux操作系统;选用并移植嵌入式Linux操作系统于OMAP,实现对接收机软硬件的控制和管理;构建文件系统,用来组织操作系统的文件。应用软件的研制包括:在嵌入式Linux操作系统的平台上研制了双核通讯应用软件,实现DSP核与ARM核的双核通讯,完成数据传输。本文实现了双核间的数据传输和ARM的控制功能,完成了遥测接收机控制软件的研制。更多还原

【Abstract】 Low earth orbit(LEO) micro-satellite communication system will be presenting a promising future, due to her small size, low cost and short circle of development, which promotes the development of micro-satellite and relevant technologies. Among them, the remote control and telemetry technology is a very important on, which is the science and technology of automatic measurement and transmission of data by wire, radio, or other means from remote sources, as from space vehicles, to receiving stations for recording and analysis. From this point of view, the LEO micro-satellite telemetry receiver aims at receiving data and delivering analysis on satellite state to the terminal equipment when the satellite enters into certain areas.To meet the needs of being portable and digital, we apply OMAP5912 from TI as the main processor of the receiver. OMAP5912, widely used in intelligent mobile phones, combines the TMS320C55x DSP core with a TI-enhanced ARM926EJS processor to provide the optimal balance of high performance and low power consumption necessary for these devices. Based on OMAP, we developed embedded Linux OS and application software of the controlling system.For the controlling software, we transplanted U-Boot, booting OS, embedded Linux OS, responsible for controlling the hardware and softwareof the receiver, developed file system, organizing and managing the files in OS and compiled the programs to realize the communications between ARM and DSP.Finally, we succeed in developing the software of the controlling system, accomplishing the communication between two cores and making ARM control the whole receiver.更多还原