Galileo CBOC信号跟踪的多径抑制方法及性能分析  

Performance analysis on multipath mitigation techniques of Galileo CBOC signals' tracking

作　　者：祝雪芬[1] 陈熙源[1] 

机构地区：[1]东南大学仪器科学与工程学院微惯性仪表与先进导航技术教育部重点实验室(B类),南京210096

出　　处：《中国惯性技术学报》2011年第4期472-476,共5页Journal of Chinese Inertial Technology

基　　金：国家自然科学基金项目(0975049);东南大学微惯性仪表与先进导航技术教育部重点实验室(B类)开放基金资助项目(201011)

摘　　要：针对未来Galileo E1频段拟采用的CBOC调制信号,研究如何消除多径对Galileo CBOC信号跟踪的影响,提高定位精度。在对Galileo CBOC调制技术进行描述,并对窄相关和Strobe相关的鉴别函数进行分析的基础上,将这两种多径抑制方法运用在Galileo CBOC信号跟踪的多径抑制方面。通过Matlab仿真实验得出,窄相关和Strobe相关均适用于Galileo CBOC调制信号,且CBOC(6,1,1/11)信号调制下,当取多径延迟为200ns时进行试验,Strobe相关较窄相关的多径抑制性能提高约55.5%。Composite BOC（CBOC） modulation has been proposed for the future Galileo E1 OS.In order to mitigate the multipath＇s influence on Galileo CBOC tracking and improve the positioning precision,these two techniques,based on the description of the Galileo CBOC signals and the analysis of the narrow correlator and strobe correlator＇s discrimination function,are applied to mitigate the multipath＇s influence on CBOC signals.The Matlab simulation results indicate that both narrow correlator and strobe correlator can be applied to Galileo CBOC＇s multipath rejection.When the multipath delay is 200 ns,the performance of strobe correlator is 55.5% better than narrow correlator with the CBOC（6,1,1 / 11） modulation.

关 键 词：复合副载波(CBOC) 多径 窄相关 选通(Strobe)相关 

分 类 号：U666.1[交通运输工程—船舶及航道工程]