高动态GPS模拟器信号产生模型研究  

Development on the High Dynamic GPS Signal Simulator Signal Model

作　　者：张伯川[1] 张其善[2] 常青[2] 

机构地区：[1]北京航天自动控制研究所,北京100854 [2]北京航空航天大学电子信息工程学院,北京100083

出　　处：《电子学报》2008年第6期1084-1087,共4页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60027001)

摘　　要：高动态GPS卫星信号模拟器可以根据载体的动态环境,精确产生载体收到的GPS卫星信号.在对GPS接收机接收信号进行深入分析后发现GPS信号模拟器以接收时刻为标准以一定的时间间隔计算模拟器信号码和载波速率及信号的传播延时,由于接收机与GPS星之间存在的径向加速度,使得对应的信号发出时刻的间隔不等于计算机进行样点计算的间隔.本文给出了在高动态条件下GPS卫星信号模拟器的信号模型,在对模型误差进行分析计算的基础上讨论了通过增加采样率来减小由于模拟高加速度信号而带来的误差的方法.According to receiver＇ s dynamic environment, high dynamic GPS signal simulator can precisely generate GPS signal that the receiver get. After a thorough analysis of the signal received by the GPS receiver, it is found that in the GPS signal simulator the frequency of the code and cartier and the time delay of the signal spreding are computed at a certain interval according to the receiver time. Since there is a acceleration between the receiver and GPS satellites, the interval of the signal transmit lime is not equal to the interval of the signal sampled time. The computation method for the GPS signal in the high dynamic condition is presented. Based on the error analyse of the model, the method with the increasing the sampling rate for minimizing the errors caused by the simulation of the high acceleration signal is proposed.

关 键 词：全球定位系统 高动态信号模拟器 信号控制 

分 类 号：TN850.4[电子电信—信息与通信工程]