摘要
通过对伽利略系统E2-L1-E1、E5和E6频段信号的分析,提出了一种基于软件的伽利略信号发生源的设计方法。根据二进制偏移载波(binary offset carrier,BOC)与衍生型BOC的调制原理、性能以及系统调制参数的变化过程,详细讨论了各信号的产生机制与调制方案;在此基础上,利用matlab平台搭建伽利略系统的软件信号源,得出信号的功率谱密度。仿真结果与成熟的理论分析相一致,表明了设计方法的可行性。该设计方法可为进一步的信号捕获与跟踪研究提供可靠的方法依据。
By analyzing the Galileo E2-L1-E1, E5 and E6 band signals, the design of software-based signal generator is put for- ward. According to the modulation principles and performance of BOC （binary offset carrier） and derivative BOC as well as the changing process of the modulation parameters of the system, detailed description of each band modulation scheme is given. On that basis, the matlab software platform is used to build Galileo signal source and the power spectral densities of signals are presented. Simulation results are consistent with the mature theory, which prove the feasibility of the design. This design method can provide a reliable basis for the further research of Galileo acquisition and tracking.
出处
《计算机工程与设计》
CSCD
北大核心
2014年第2期368-375,共8页
Computer Engineering and Design
基金
国家自然科学基金项目(61271423)
