卫星导航系统信号模拟器通道零值标定方法研究  

Research on Calibration of GNSS Signal Simulator

作　　者：林红磊[1] 牟卫华[1] 王飞雪[1] 

机构地区：[1]国防科学技术大学卫星导航定位技术工程研究中心,长沙410073

出　　处：《导航定位学报》2013年第4期61-64,83,共5页Journal of Navigation and Positioning

摘　　要：导航信号模拟器的通道时延标定的方法有两种,一种是利用高速示波器测量信号时域波形中翻转点相对于参考点的时延,另一种是对信号作相关接收,测量相关峰的时延。理论分析和仿真结果表明在通道理想的情况下,两种测量方法是等价的,在非理想的通道下,两种测量方法的结果是不同的。对比分析表明相关峰法能更好的满足不同体制信号下的模拟器通道时延测量的要求。最后利用相关峰时延测量原理,给出了一种具体测试方案,实测结果表明该方案有效可行。There are two methods to calibrate GNSS signal simulator channel delay,one is measuring the delay of turning point through high speed oscilloscope and the other is estimating the delay of correlation peak.Theoretical analysis and simula- tion results indicate that in ideal channel those methods are equivalent,but in non-ideal channel the results of two methods are different.Comparative analysis shows that the correlation peak method meet the needs of simulator channel delay measurement requirements better under different system signals.Last,this paper gives a test plan based on the method of correlation peak, and the results show that the scheme is effective and feasible.

关 键 词：导航信号模拟器 通道时延测试 翻转点测量法 相关峰测量法 

分 类 号：P228[天文地球—大地测量学与测量工程]