电讯技术
電訊技術
전신기술
TELECOMMUNICATIONS ENGINEERING
2013年
1期
28-32
,共5页
刘建成**%桑怀胜%徐斌贝%冯晓超
劉建成**%桑懷勝%徐斌貝%馮曉超
류건성**%상부성%서빈패%풍효초
全球卫星导航系统%信号异常监测%2OS模型%相关函数%信噪比
全毬衛星導航繫統%信號異常鑑測%2OS模型%相關函數%信譟比
전구위성도항계통%신호이상감측%2OS모형%상관함수%신조비
GNSS%signal anomaly monitoring%second-order step model%correlation function%SNR
研究了卫星导航信号异常对导航接收机信噪比的影响.根据卫星导航异常信号3个2OS (Second-Order Step)模型,即TMA(Threat Model A)、TMB(Threat Model B)和TMC(Threat Model C),分析了其相关峰特性,然后推导得到了3个模型下异常导航信号信噪比与正常信号信噪比之差,并在模型参数取值范围内进行了数值分析.结果表明, TMA模型信号异常会造成信噪比损失,而TMB和TMC模型信号异常在某些情况下则对信噪比有增强作用,因此信噪比不能作为2OS模型卫星导航信号异常的监测手段.
研究瞭衛星導航信號異常對導航接收機信譟比的影響.根據衛星導航異常信號3箇2OS (Second-Order Step)模型,即TMA(Threat Model A)、TMB(Threat Model B)和TMC(Threat Model C),分析瞭其相關峰特性,然後推導得到瞭3箇模型下異常導航信號信譟比與正常信號信譟比之差,併在模型參數取值範圍內進行瞭數值分析.結果錶明, TMA模型信號異常會造成信譟比損失,而TMB和TMC模型信號異常在某些情況下則對信譟比有增彊作用,因此信譟比不能作為2OS模型衛星導航信號異常的鑑測手段.
연구료위성도항신호이상대도항접수궤신조비적영향.근거위성도항이상신호3개2OS (Second-Order Step)모형,즉TMA(Threat Model A)、TMB(Threat Model B)화TMC(Threat Model C),분석료기상관봉특성,연후추도득도료3개모형하이상도항신호신조비여정상신호신조비지차,병재모형삼수취치범위내진행료수치분석.결과표명, TMA모형신호이상회조성신조비손실,이TMB화TMC모형신호이상재모사정황하칙대신조비유증강작용,인차신조비불능작위2OS모형위성도항신호이상적감측수단.
Effect of satellite signal anomalies on SNR(Signal to Noise Ratio)of GNSS(Global Navigation Satellite System)receiver is studied. According to the 2OS(Second-Order Step)threat model of satellite signal anoma-lies,i. e. TMA(Threat Model A),TMB(Threat Model B)and TMC(Threat Model C),the correlation peak characteristics are analyzed,then the SNR difference of nominal signals and 2OS model signals are derived,fi-nally numerical analysis is made in the 2OS model parameter space. The results show that TMA makes SNR loss,but TMB and TMC make SNR increase in certain instances,so SNR cannot be a mean of signal quality monitoring for satellite signal anomalies.
