Differential equation dynamical system based assessment model in GNSS interoperability

With the development of Global Navigation Satellite System (GNSS),the idea of GNSS interoperability is born and has become the focus of study in the field of satellite navigation.The popularity for GNSS to augment the interoperability with the existing ones necessitates the study of the assessment algorithm of this idea.In this paper,an assessment algorithm for interoperability comprehensive benefits based on the differential equation dynamical system is discussed.There are two important aspects in GNSS tha...     

A study on volunteer augmentation navigation technology

Navigation augmentation technology is one of the most common methods to increase the continuity,reliability and integrity of the global satellite navigation system.The concept of volunteer augmentation navigation (VNA) is proposed and the elements and topological structure of VNA are also analyzed in this paper.The study focuses on the neural network model that volunteers and ordinary users use modern communication information network to exchange self-organizing information.The neural cell model of Voluntee...     

基于小波分析的陀螺漂移趋势项提取

利用Ｄｅｂｅｃｈｉｅｓ 正交小波基,经过多尺度变换能够将一个序列分解成平滑的基本趋势序列和局部的变化细节序列。本文借助多尺度信号分解理论,提出了一种基于小波分析的信号特征提取算法。仿真结果表明利用该算法能够有效地对信号进行趋势估计。最后,本文将该算法应用于液浮陀螺移信号的试验建模中,实现了陀螺漂移信号的趋势项提取。     

GPSSA误差建模和对组合导航系统性能的影响

本文探讨了ＳＡ建模，即采用ＦＦＴ对ＴＡＮＳ－２接收机实测的ＧＰＳ静态定位误差样本作功率谱分析，并通过最小二乘拟合，获得ＳＡ的平稳线性模型；本文还用车载组合导航系统的仿真结果验证了近似模型的有效性。