北斗卫星导航系统在轨信号监测与数据质量分析  

Monitoring & Analysis Of BDS In-Orbit Signal Quality

作　　者：欧阳晓凤[1] 徐成涛[1] 刘文祥[1] 欧钢[1] 

机构地区：[1]国防科学技术大学电子科学与工程学院卫星导航研发中心,湖南长沙410073

出　　处：《全球定位系统》2013年第4期32-37,共6页Gnss World of China

摘　　要：导航信号质量监测平台由全向天线及高增益接收天线单元、监测接收机、下变频器、信号采集存储设备和PC信号质量分析软件组成,实现了在轨卫星的数据层长期评估和信号层精细分析。利用导航信号质量监测平台,对北斗、GPS、GLONASS等卫星信号的时域、频域、调制域、相关域、测量域等质量进行了评估,并对码减载波、码相位相干性和信号相关峰等关键指标进行了具体分析与比较。结果表明:目前北斗系统在轨信号质量与GPS信号质量相当,略优于GLONASS信号质量。The navigation signal quality analysis platform is consist of omnidirectional high-gain directional antennas, monitoring receiver , down converter, signal record ~ play- back system, and analysis software. This system combines long-term evaluation in data layer and comprehensive parameters analysis in quality layer. The paper is based on the signal quality platform, which analyze the signals of BDS.GPS and GLONASS in time-domain, fre- quency domain, modulation domain, correlation domain and measurement domain. Then, the key and difficult abnormality monitoring indicators are specifically discussed and corn pared, including code minus carrier, the code phase coherence and signal correlation peaks. Finally, the comparison results between GNSS show that： the present BDS signal quality is equivalent with GPS, slightly better than GLONASS.

关 键 词：在轨信号评估 全球导航卫星系统 信号质量 

分 类 号：TN967.1[电子电信—信号与信息处理]