一种更精确的多模GNSS兼容性方法研究

传统的卫星导航系统的多系统兼容性分析方法只适用于分析长码、码速率高和数据速率高的信号兼容性。通过推导信号模型，讨论了信号参数对干扰系数的影响，提出了一种更精确的多模全球卫星导航系统（global navigation satellite system, GNSS）系统兼容性分析方法。该方法加入了多普勒的影响，并且考虑了与期望信号同频段内的所有卫星导航信号，适用于任意伪码结构、数据结构的卫星导航信号兼容性分析。最后通过仿真GPS系统内干扰与系统间干扰验证了方法的正确性，并得出Galileo 在E1采用的MBOC信号对GPS C/A信号产生的干扰在0.1 dB以内。

More accurate methodology for assessing multi-mode GNSS compatibility

Traditional methodology for assessing multi-mode global navigation satellite systems (GNSS) is only suitable to analyzing compatibility of the signal which has long code, high code rate and data rate. Through deducing signal model and discussing the influence of data rate and the pseudo code of the navigation signals onto SSC, a more accurate methodology for assessing GNSS compatibility is proposed. This methodology, which includes Doppler effects and takes into account all the satellite navigation signals in the same frequency with expected signal, is suitable for all types of satellite navigation signals. And it is proved by analyzing GPS intrasystem and intersystem interference. The results show that the interference of E1 OS to GPS C/A is limited in 0.1 dB.