【作者】 张宁；

【导师】 孙恩昌； 冯磊；

【作者基本信息】 北京工业大学 ， 电子与通信工程（专业学位）， 2019， 硕士

【摘要】 现阶段,随着卫星导航技术的飞速发展,导航技术的使用也有所增加。在这种环境下对卫星导航设备的研究引起了广泛的关注。为了快速,准确地设计满足人群需求的终端设备,有必要开发便携式存储回放导航信号模拟器。本论文的目的是开发基于硬件平台的便携式存储回放北斗导航信号模拟器。模拟器首先利用解调解扩、导航解算、高精度观测量获取等处理技术得出伪距、电文、时间等关键信息,并将该信息存入Flash芯片,再利用信号调制技术,将承载定位信息的伪距、电文等信息从Flash中读出,重新同步并进行调制,生成该时间段的卫星信号,经发射天线向模拟器辐射。基于DSP、FPGA的小型化、高可靠收发处理硬件平台:存储回放模拟器的硬件平台应从技术要求中分解出如功能、性能、接口、结构尺寸、外形外观、使用环境等相关的设计要求,再综合系统软件对硬件平台的需求,确定出硬件设计方案,采用小型化、通用化、模块化的设计思想,对接收信道模块、通道模块、发射信道模块、时钟模块、电源模块、接口模块、触摸显控模块等多个模块进行元器件选型和电路设计。其次,根据特定的PCB设计规则执行硬件系统,并完成每个硬件模块的功能测试。在针对每个任务测试每个模块的基础上,实现了以下任务:串行通信协议设计,完整的硬件启动和操作方法以及存储回放信号主功能的实现。最后,最终测试结果表明,本文开发的系统平台可以保证稳定的系统性能。更多还原

【Abstract】 At this stage,with the rapid development of satellite navigation technology,the use of navigation technology has also increased.The study of satellite navigation equipment in this environment has attracted wide attention.In order to quickly and accurately design a terminal device that meets the needs of the crowd,it is necessary to develop a portable storage playback navigation simulator.The purpose of this document is to develop a portable Beidou navigation signal simulator based on a hardware platform.The simulator first uses key processing such as demodulation and despreading,navigation solution,and high-precision observation and acquisition to obtain key information such as pseudorange,message,and time,and stores the information in the Flash chip,and then uses signal modulation technology to locate the bearer.Information such as pseudoranges and messages are read out from the Flash,resynchronized and modulated,and the satellite signals of the time period are generated and radiated to the simulator via the transmitting antenna.DSP,FPGA-based miniaturization,high-reliability transceiver processing hardware platform: The hardware platform of the storage and playback simulator should decompose the relevant design requirements such as function,performance,interface,structure size,appearance and appearance,etc.from the technical requirements.Integrated system software requirements for the hardware platform,determine the hardware design,use miniaturization,generalization,modular design ideas,receive channel module,channel module,transmit channel module,clock module,power module,interface module,touch Multiple modules such as the display control module perform component selection and circuit design.Second,the hardware system is executed according to specific PCB design rules,and the functional test of each hardware module is completed.Based on testing each module for each task,the following tasks are implemented: serial communication protocol design,complete hardware startup and operation methods,and implementation of the main function of the stored playback signal.Finally,the final test results show that the system platform developed in this paper can guarantee stable system performance.更多还原