多模多频CO RS基站专用接收机设计与实现

摘要

According to problems that base station cannot support satellite data of multi-mode,multi-band and its inconvenient in remote monitoring,a software and hardware design and implementation method of CORS base station is provided.Based on the ARM9 processor,integrated BD970 OEM board,the hardware platform including power supply module,ethernet module, serial communication module,satellite positioning module and display module is built.Based on the hardware platform, transplanting Linux operating system,embedded webserver which can monitor the working status of the whole machine and the tracking of satellites through Ethernet is implemened,and the server has the function of remote operation and control.Test results show that the developed base station receiver can receive satellite data of three constellation and six frequency points.At the same time,data utilization rate is above 95%,dual frequency carrier multipath effect of single day is below 0.06 m,signal to noise ratio is greater than 40,base station data integrity rate is greater than 99.99%,the average data delay is better than 5 ms,which have achieved a reliable collection and forwarding data in accordance with the relevant standards.%针对基站不支持多模多频卫星数据和远程监测不便的问题,提出一种 CORS基站软、硬件设计及实现方法。基于 ARM9处理器,集成BD970 OEM板卡,搭建了包括电源模块、以太网模块、串口模块、卫星定位模块和显示模块的硬件平台。在硬件平台的基础上移植Linux操作系统,实现了嵌入式Web的功能。通过以太网的远程操作与控制功能远程访问基站,监测整机的工作状态和卫星跟踪情况。测试结果表明,所研制的基站接收机可接收三系统六个频点的卫星数据,数据利用率在95%以上,双频载波单天多路径效应值在0.06 m以下,信噪比大于40,准站数据完整率大于99.99%,数据平均延迟优于5 ms,实现了可靠收集、转发数据的目的,符合相关标准要求。