高动态GPS模拟器通道时延校正研究

Study on Channel Time Delay Correcting of the High Dynamic GPS Signal Simulator

高动态GPS卫星信号模拟器可以根据GPS接收机的动态环境,精确产生接收机收到的GPS卫星信号。GPS卫星信号模拟器有多种技术要求,其中,通道的时延一致性的测量和修正是研制模拟器所必须解决的一项关键技术。本文给出了测量模拟器通道硬件时延的一种新的方法,同时,为进一步提高测量精度,测试接收机采用了载波相位平滑伪距的方法。试验结果证明了所提方法的有效性。

According to receiver＇s GPS dynamic environment,high dynamic GPS signal simulator can precisely generate GPS signal that the receiver get.GPS signal simulator has many technology request,the measuring and correcting of the time delay ＇of the different channels is a key technology in the high dynamic GPS receiver＇s research and development.A new method for measuring of the time delay ＇of the different channels is proposed in this paper,at the same time,for obtaining the better precision,the testing receiver adopt the method of the carrier phase to smooth the pseudorange. Experimentation result proves the effectiveness of the method mentioned above.