摘要
航天器和导弹需要高精度的定位服务,为了能达到更高的定位精度和抗干扰性能,新型的卫星导航系统如Galileo系统和GPS的M码采用二进制偏置载波(BOC)调制方式。本文对Galileo信号和GPS的M码信号及其抗多径性能进行了仿真,分析得出BOC调制能使新增信号频谱与现有信号很好的隔离,相对于传统的BPSK调制信号具有更好抗干扰、抗多径性能,并能改善定位精度。
To meet high accuracy and anti-interference requirements of spacecraft and missiles,Galileo and M code of GPS system use Binary Offset Carrier(BOC) modulation.Galileo and M code of GPS signals and their anti-multipath performance have been simulated.The results show that BOC modulation can separate the newly added signal from the existing spectrum and has better anti-interference and anti-multipath performance.
出处
《飞行器测控学报》
2009年第4期80-84,共5页
Journal of Spacecraft TT&C Technology