卫星导航接收机测速精度测量方法研究

以GPS为例,研究卫星导航接收机动态测量精度的测量方法。讨论了被动式导航接收机的测速原理,阐述了卫星导航信号模拟源产生信号的基本方法,说明通过调节模拟源中各延迟环节的时延量,即可模拟产生相对于载频的频偏,以此作为接收机动态的理论真值并与实际测量值相比较,可获得包括速度在内的动态测量精度。在理论分析的基础上介绍了基于模拟源的接收机测速精度测量的实现方法。

Study of Precision Measurement Methodology of Motion Velocity Measuring for Satellite Navigation Receiver

It's necessary to evaluate the performance of satellite navigation receivers regularly. Due to the limitation of available instruments and related measuring methods, however, It is very difficult to verify the precision of motion velocity measurement of the receivers. For this reason, one of the measurement methodologies for dynamic measuring implemented by navigation receiver is reported on the background of global positioning system (GPS). The principle for passive motion velocity measuring of navigation receivers is discussed, and the fundamental architecture of navigation signal simulator which imitates and generates satellite signals is analyzed. An expected carrier wave frequency-shifting, by which the theoretic values of motion velocity would be derived, can be obtained via careful adjustment of time delay of the navigation signal simulator, and the measurement precision of receivers can be sequentially certificated via comparing the theoretic values with practical measured values. Provided with the preceding arguments, an approach for precision measurement of motion velocity is eventually presented based on the simulator.