卫星导航系统时间频率性能测度方法研究

Study on the method of measuring the Time & Frequency performance of Satellite Navigation Systems

对导航系统中的时间频率性能进行评估较为复杂.目前已知的时间频率测试主要是针对单机和分离部件,就时间频率体系整体来研究测试评估方法还较少.通过对导航系统中的时间频率体系的分析,提出从时间频率链性能带限和时间频率的可微度两个方面进行整体性能的分析和测评.时间频率性能带限主要用于分析评估时间频率技术指标分解的合理性、各关联内容技术指标的协调性和一致性.时间频率可微度主要用于分析评估时间频率信号和数据的平稳性.通过可微度分析计算,来评估数据更新、参数建模、模型预报,以及冗余切换、信号控制和保持驾驭的策略和技术的有效性.本文提出并使用这两个概念,研究了对卫星导航系统中的时间频率的一种测试评估方法.

It＇s a very complex job to evaluate the Time Frequency performance of Satellite Navigation Systems.Almost all of the available methods for Time Frequency performance measurement are designed for the single equipment or the discrete part.But it is rarely considered to measuring the performance of Time Frequency System as a whole.In this paper,two ways of the performance chain standard range and Time Frequency differentiable degree are given to analyze and evaluate the performance of Time Frequency.Time Frequency performance chain standard is used for analyzing the reason and the consistency of Time Frequency technical index decomposition.Time Frequency differentiable degree is named for evaluating the stationarity of the time signals and data.By Time Frequency differentiable degree analysis,we evaluate the effectiveness of the method and technology for data updating,parameter modeling,forecast model and redundancy switch,signals controlling.Here,the two concepts are presented and used.We designed the method for measuring and evaluating the Time Frequency of Satellite Navigation Systems.