| 基于交叉证认的EMD滤波及其在GPS多路径效应中的应用 |
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| 引用本文： | 罗飞雪,戴吾蛟,伍锡锈.基于交叉证认的EMD滤波及其在GPS多路径效应中的应用[J].武汉大学学报(信息科学版),2012,37(4):450-453. |
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| 作者姓名： | 罗飞雪 戴吾蛟 伍锡锈 |
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| 作者单位： | 中南大学地球科学与信息物理学院,长沙市麓山南路932号,410083／湖南省精密工程测量与形变灾害监测重点实验室,长沙市麓山南路932号,410083 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 利用交叉证认的方法，提出一种新的基于EMD滤波去噪方法，并将其应用于GPS多路径效应的研究中。通过模拟实验及实测数据分析表明，该方法能够自适应地选择IMF中的信号层数，削弱随机噪声，合理地分离信号和噪声。利用该滤波方法去噪并建立具有重复性的多路径误差效应改正模型，可有效地削弱多路径效应的影响，进而提高GPS动态变形监测的精度。
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| 关 键 词： | 交叉证认 EMD滤波去噪 GPS 多路径效应 |
EMD Filtering Based on Cross-Validation and Its Application in GPS Multipath |
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| LUO Feixue,DAI Wujiao,Wu Xixiu.EMD Filtering Based on Cross-Validation and Its Application in GPS Multipath[J].Geomatics and Information Science of Wuhan University,2012,37(4):450-453. |
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| Authors: | LUO Feixue DAI Wujiao Wu Xixiu |
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| Institution: | 1,2(1 Department of Surveying Engineering & Geo-Informatics,Central South University,932 South Lushan Road, Changsha 410083,China)(1 Key Laboratory of Precise Engineering Surveying & Deformation Disaster Monitoring of Hunan Province, 932 South Lushan Road,Changsha 410083,China) |
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| Abstract: | The EMD filtering method based on the cross-validation is developed and applied to the study on GPS multipath effects.Experiments with both simulated data and real GPS observations show that the method can select the signals in the IMFs,reduce random error and separate noise from signals adaptively.Using this method to extract and model the correction of Multipath error can weaken the effects of Multipath,and then improve the accuracy of GPS surveying in dynamic deformation monitoring. |
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| Keywords: | cross-validation EMD noise filter GPS multipath effects |
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