不同参数下GNSS软件接收机跟踪环性能分析

Performance analysis of GNSS software receiver tracking loop under different parameters

摘要:

针对用户接收机实际跟踪卫星信号过程中跟踪环参数设置模糊性问题，着重分析了GNSS(Global Navigation Satellite System)接收机跟踪环路参数设计的范围，然后通过Matlab仿真环境对不同环路参数下信号跟踪效果进行了仿真，得出了接收机环路参数的经典取值（阻尼系数ζ=0.707，带宽BL=25 Hz），最后通过软件接收机实验平台对实际采集到的卫星中频信号进行了跟踪验证，实验结果证明了跟踪环路参数选择的有效性。

Abstract:

With the development of Global Navigation Satellite System , the software receiver plays a more and more important role in the experimentations of end-user receiver. Based on the analysis of GNSS tracking principle, we discussed the design of tracking loop parameters， then verified the tracking effect in different loop parameters through the simulation ,obtained the classical values of loop parameters at the common conditions, finally test results prove the rationality and validity of the tracking loop parameters selection via tracking verification of the actual collected intermediate-frequency satellite signal.