摘要
由于现阶段Galileo可见星数量有限,使Galileo接收机的研究与测试遇到了一定的困难。针对这一现象,文中采用了一种基于时间压扩特性的到达信号模拟算法,结合矢量信号发生器硬件,设计实现了Galileo E1频段信号的模拟。模拟算法采用三阶多项式拟合任意时刻的信号传输时间模型,通过快速迭代实现信号传输时间的精确计算,实现了多普勒频移与相对码相位的动态模拟。利用硬件接收机对生成的信号进行接收验证,证明了算法的正确性。
Due to the limited number of visible Galileo satellites at this stage,the Galileo receiver’s research and testing has encountered some difficulties. In view of this phenomenon,this paper used the arrival signal simulation algorithm based on time compression and expansion,combined with the vector signal generator hardware,to design and implement the Galileo E1 band signal simulation. The simulation algorithm used the third-order polynomial to fit the signal transmission time model at any time,and realized the accurate calculation of signal transmission time by fast iteration,which can realize the dynamic simulation of Doppler frequency shift and relative code phase. Finally,the correctness of the algorithm was proved by using the hardware receiver to receive and verify the generated signal.
作者
杜蒙
宋茂忠
熊骏
DU Meng;SONG Maozhong;XIONG Jun(School of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China)
出处
《电子科技》
2018年第6期43-47,共5页
Electronic Science and Technology
基金
国家重大科学仪器开发专项(2013YQ200607)
