附加斜率绝对值法的模态相关EMD-ICA滤波降噪算法及GPS应用研究  

Modal Correlation EMD-ICA Filtering Noise Reduction Algorithm with Additional Slope Absolute Value Method and Its Application in GPS

作　　者：刘天宇[1] 吴金斌[1] 周世健[2] 

机构地区：[1]东华理工大学测绘工程学院,南昌330013 [2]南昌航空大学,南昌330063

出　　处：《江西科学》2017年第4期509-515,共7页Jiangxi Science

基　　金：国家自然科学基金资助项目(41374007)

摘　　要：为了削弱或剔除GPS测量数据或信号中混杂的噪音成份以及GPS多路径效应误差,提出一种附加斜率绝对值法的模态相关EMD-ICA滤波降噪法,并通过一定的数学推导,证明了斜率绝对值法具有一定合理性。通过实验将该方法与现有几种滤波法进行比较,验证了新方法能够有效处理GPS测量数据中的噪音成份以及削弱多路径效应误差,并且取得较好的效果。In order to weaken or eliminate the mixed noise components and GPS multi-path effect er- ror in GPS measurement data or signal, a modal correlation EMD-ICA filter denoising method with additional slope absolute value method is proposed and proved by some mathematical derivation. The slope absolute value method has some rationality. The method is compared with the existing filtering methods to verify that the new method can effectively deal with the noise components in the GPS measurement data and weaken the multi-path effect error, and get better results.

关 键 词：经验模态分解 独立分量分析 降噪 斜率绝对值 GPS多路径效应误差改正 

分 类 号：P228.4[天文地球—大地测量学与测量工程]