A noise analysis method for GNSS signals of a standalone receiver
A noise analysis method for GNSS signals of a standalone receiver
复制标题
独立接收机GNSS信号的噪声分析方法
DOI：
10.1007/s40328-016-0189-x
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发表时间：
2017-09-01
影响因子：
1.4
通讯作者：
Yang, Ling
中科院分区：
文献类型：
--
作者：
Zhang, Zhetao;Li, Bofeng;Yang, Ling
全球导航卫星系统(GNSS)接收器信号噪声分析的广泛研究主要基于零基线和/或短基线，其中需要一对接收器。针对单机GNSS接收机提出了一种新的信号噪声评估方法。在该方法中，建立了保留剩余电离层延迟和多径的时差无几何(GF)模型。为了消除这些系统性的趋势偏差，采用了二次多项式拟合法。然后进一步应用混合自回归滑动平均(ARMA)模型来捕捉这一平稳的、时间相关的时间序列。最后，根据误差传播规律对接收机信号的精度进行了评估。利用10组数据对该方法的性能进行了数值测试，并与零基线和短基线方法进行了比较。结果表明，该方法能够同时评估独立接收机的相位精度和编码精度，并与零基线和短基线方法得到的结论一致。同样，由于新方法只需要一个接收器，因此可以比传统方法实现更多的应用，特别是在精确的单点定位方面。
Extensive studies on signal noise analysis of Global Navigation Satellite Systems (GNSS) receivers are mainly based on zero and/or short baselines where a pair of receivers is required. This paper develops a new signal noise assessment method for a standalone GNSS receiver. In this new method, the time differenced geometry-free (GF) model is formed, where the residual ionospheric delay and multipath remain. In order to eliminate these systematic trend biases, the second-order polynomial fitting is used. Then the mixed autoregressive moving average (ARMA) model is further applied to capture this stationary and time-correlated time series. As a result, the pure random noise ofGF is obtained, which is finally used to assess the precision of receiver signal in terms of the error propagation law. The performance of this new method is numerically tested by using 10 sets of data and compared with the methods of zero and short baselines. The results indicate that the new method is able to assess both the phase and code precision of a standalone receiver, and the conclusions are consistent to those from the methods of zero and short baselines. Since again the new method needs only one receiver, it could be implemented in more applications than the traditional methods, especially in precise point positioning.