基于GALILEO的LOC信号多径误差研究

Multipatherror Simulation of LOC Signal in GALILEO

分析了伽利略卫星导航系统中采用线性偏移载波调制新技术的LOC信号,对其多径误差作重点讨论,提出应根据副载波调制指数的不同而采用不同类型的副载波。并用Matlab对LOC信号的码多径误差和载波多径误差进行仿真,给出仿真结果。仿真表明,LOC信号的码多径误差要远大于其载波多径误差。当副载波调制指数为偶数时,余弦副载波LOC(2,1)信号的码多径误差优于正弦副载波LOC(2,1)信号的码多径误差,当副载波调制指数为奇数时,正弦副载波LOC(1.5,1)信号的码多径误差优于余弦副载波LOC(1.5,1)信号的码多径误差。

Linear Offset Carrier(LOC) modulation that was different from GPS and GLONASS would be possibly taken in the future GALILEO Navigation Satellite System.This paper analyzed LOC modulation in several aspects especially in the LOC signals' multipatherror of PRN code and carrier,and multipatherror simulation result about LOC(2,1) and LOC(1.5,1) was given in the last part.The result has shown that multipatherror of PRN code is far more than that of carrier,and when the subcarrier modulation index is even in the ...