中文摘要：

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。

英文摘要：

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 ob- servations 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.