摘要
在伽利略卫星导航系统的E5频段上,采用的是交替二进制偏移载波(Alt BOC)的调制方式,这种调制技术与传统的PSK-R调制技术相比,频带利用率高,且信号有更好的捕获跟踪性能和抗干扰能力。从伽利略E5频段的信号结构出发,结合数学仿真,研究了E5调制信号的调制方式、功率谱密度、自相关函数、码跟踪精度和抗多径性能,验证了伽利略E5频段的优越性,为E5信号的接收提供了理论依据。
For the E5 frequency band of the Galileo satellite navigation system, the alternate binary offset carrier（AltBOC） modulation technology is adopted. Compared with the traditional PSK-R modulation technology, the AltBOC modulation technology is characteristic of higher spectral efficiency and better performance in acquisition, tracking and anti-multipath. In this paper, the structure of the Galileo E5 signal is analyzed, and then the modulation technology, power spectral density, autocorrelation function, code tracking accuracy and anti-multipath performance for Galileo E5 signal are studied with mathematical simulation. At last, the superiority of the Galileo E5 band is validated. All the results can provide theoretical foundation for E5 signal receivers.
出处
《时间频率学报》
CSCD
2016年第1期25-32,共8页
Journal of Time and Frequency
基金
中国科学院"西部之光"人才培养计划西部博士资助项目(Y307YR6601)
