RNSS通道分数码片时延标定软件的设计与实现

一种基于Matlab GUI环境开发的导航卫星RNSS发射通道分数码片绝对时延自动化标定软件的设计，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双通道高速数据采样，对采样后的导航信号进行平方律检波和FIR滤波等数字信号处理，寻找码片换相点，根据秒脉冲触发电平样本点和换相点，获取分数码片时延，根据设定的标定次数，自动完成导航卫星分数码片绝对时延多次测量，并求平均，从而得到最终测量值；软件具有界面友好，操作简单，显示直观等特点，在导航卫星整星综合测试中得到应用。

Design and Implementation of Calibration Software of Fractional Code Delay for RNSS Signal Transmitting Channel on Navigation Satellite

A design and implementation of automatic calibration software of fraction code delay for RNSS （Radio Navigation Satellite Server） signal transmitting channel for navigation satellite based on Matlab GUI is presented. The software controls a high sampling rate digital oscilloscope through GPIB interface. The Navigation satellite BPSK transmission signal and pules per second signal are sampled. With a digital signal processing algorithm, the phase transform point corresponding to chip level changement is determined, then fraction chip delay is obtained. The interface of software is friendly. The operation of software is easy and the display of the processing result is visual. The software has been applied to the integration test of navigation satellite.