导航卫星民码信号通道零值标定软件设计  

The software design of calibration of navigation satellite signal channel zero civil code

作　　者：郑育红[1] 董海青[2] 付林春[2] 李懿[2] 崔小准[2] 

机构地区：[1]中国空间技术研究院通信卫星事业部,北京100094 [2]中国空间技术研究院总体部,北京100094

出　　处：《自动化与仪器仪表》2015年第6期141-143 147,147,共4页Automation & Instrumentation

基　　金：国家科技重大专项资助项目(GFZX03010201114)

摘　　要：一种基于Matlab GUI环境开发的导航卫星民码信号发射通道零值标定软件的设计和实现,该软件通过GPIB口控制高速数字示波器,对卫星下行导航信号和卫星钟的秒脉冲信号进行双通道高速数据采样,以秒脉冲上升沿为导航信号通道零值基准点,对采样后的导航信号数字进行扩频信号的捕获相关处理,确定相关峰值对应的样本点序号,再结合信号数据的采样率,计算民码导航信号通道的零值;软件具有界面友好,操作简单,显示直观,标定精度高等特点,在导航卫星整星综合测试过程中得到应用。Design and implementation of absolute calibration software has been addressed for civil signal channel on navigation satellite base on Matlab GUI development environment. The software controls high speed oscilloscope via GPIB(General-Purpose Interface Bus). Both the navigation signal and PPS(Pulse per second) on satellite are sampled at high speed in synchronization. The rising edge of PPS has been referred as the absolute base of the navigation signal channel. After correlation has been made for the date of sampled navigation signal, the index of the sampled data corresponding to the correlation peak is determined. The absolute delay of civil navigation signal channel is calculated out according to the sampling rate of the signal data. The software has several features such as user-friendly, easy to operate, intuitive display and high precision. It has been applied in the comprehensive test of the navigation satellites.

关 键 词：航卫星 民码 通道 零值 标定 

分 类 号：TN96.1[电子电信—信号与信息处理]