摘要
传统全球卫星导航系统(GNSS)兼容性方法是基于接收机即时通道推导的,不能反映干扰对码跟踪的影响。考虑干扰信号对超前通道与滞后通道的影响,引入码跟踪谱敏感系数(CT_SSC),提出了一种基于码跟踪的GNSS兼容性分析方法。仿真分析了多种系统信号设置下的信号间CT_SSC特性,与传统兼容性分析方法的结果进行了比较。最后,在对星地链路预算精确建模的基础上,采用码跟踪的兼容性方法仿真分析了GPS与Galileo卫星导航系统间的兼容性,得出以GPSC/A码作为期望信号时,全球范围内GPS系统内干扰最大值为1.26dB,Galileo系统对GPS系统干扰最大值为0.63dB,而采用传统方法将会低估这种干扰的影响。
The traditional Global Navigation Satellite System （GNSS） compatibility analysis methodology is deduced by receiver prompt channel, which could not reflect the effect of interference onto code tracking. A interference coefficient, called Code Tracking Spectral Sensitivity Coefficient （CT_SSC）, is introduced. And a GNSS compatibility analysis methodolody based on code tracking is presented. Then the CT_SSC characteristic among signals is analized under various signal setting and the GNSS compatibility traditional methodology. Finally, on the basis of accurate satellite-ground link budget modeling, intrasystem interference in GPS and intersystem interference between GPS and Galileo are caculated by using compatibility methodology based on code tracking. The results show that when GPS C/A signals is desired signals, all over the world the maximum intrasystem interference is 1.26dB, meanwhile intersystem interference of Galileo system on GPS system is 0.63. While the effects of GNSS interference signals will be understimated by using traditional method.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2010年第12期1680-1685,共6页
Acta Armamentarii
基金
武器装备重点基金资助课题
