| GPS/Doppler导航随机模型的移动窗口实时估计算法 |
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| 引用本文： | 周泽波,沈云中,李博峰. GPS/Doppler导航随机模型的移动窗口实时估计算法[J]. 测绘学报, 2011, 40(2): 220-225 |
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| 作者姓名： | 周泽波 沈云中 李博峰 |
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| 作者单位： | 1. 电子科技大学;2. 同济大学测量系现代工程测量国家测绘局重点实验室;3. 同济大学测量与国土信息工程系; |
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| 基金项目： | 国家自然科学基金(40874016) |
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| 摘 要： | 引进时间遗忘因子和观测冗余度因子,有效地平衡移动窗口内不同时刻的观测数据及其冗余情况对单位权方差估值的贡献,改进单位权方差的移动开窗实时估计算法.采用载噪比模型确定观测权阵,等价权抗差估计方法处理粗差.实测车载GPS/Doppler数据的处理结果表明:采用本文算法显著提高GPS/Doppler的导航精度与可靠性.
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| 关 键 词： | GPS/Doppler 随机模型 单位权方差 抗差估计 |
| 收稿时间： | 2010-03-02 |
| 修稿时间： | 2010-06-22 |
Moving Time-window Based Real-time Estimation Algorithm for the Stochastic Model of GPS/Doppler Navigation |
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| ZHOU Zebo,SHEN Yunzhong,LI Bofeng. Moving Time-window Based Real-time Estimation Algorithm for the Stochastic Model of GPS/Doppler Navigation[J]. Acta Geodaetica et Cartographica Sinica, 2011, 40(2): 220-225 |
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| Authors: | ZHOU Zebo SHEN Yunzhong LI Bofeng |
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| Affiliation: | ZHOU Zebo1,2,SHEN Yunzhong1,LI Bofeng1 1.Department of Surveying and Geomatics,Tongji University,Shanghai 200092,China,2.Institute of Astronautics and Aeronautics,University of Electronic Science and Technology of China,Chengdu 610054 |
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| Abstract: | A two-step method for estimating the stochastic model of GPS/Doppler integrated observation is proposed.Firstly,the robustly posterior estimation is introduced according to equivalent weight principle and carrier-to-noise ratio.Then,the variance of unit weight is estimated in a moving-window in real time by combining the forgetting factor and observation redundancy.Finally,a real vehicular GPS data is carried out to demonstrate the performance of the proposed method.The results show that the present method ... |
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| Keywords: | GPS/Doppler stochastic model unit weight variance robust estimation |
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