| 小波变换法探测周跳的延拓方式选择研究 |
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| 引用本文： | 冯磊,吉长东.小波变换法探测周跳的延拓方式选择研究[J].测绘与空间地理信息,2017,40(5). |
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| 作者姓名： | 冯磊 吉长东 |
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| 作者单位： | 1. 辽宁省海域和海岛使用动态监视监测中心,辽宁 沈阳,110000;2. 辽宁工程技术大学 测绘与地理科学学院,辽宁 阜新,123000 |
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| 摘 要： | 小波变换用于探测周跳是一种很有效的方法。它是通过一定尺度上的带通滤波器提取出细节信号,并将突变以一定的比例放大,从而发现周跳发生位置,然后采用高频系数奇异值进行插值替换,与低频系数重构,然后采用重构观测值与原始观测值作差取整的方法确定周跳值。本文将通过试算不同延拓方式对小波变换的影响,利用产生最小"边缘效应"的延拓方式,对非差、单差、双差观测值进行db6小波单尺度分解,并探讨其在单频周跳探测的应用。
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| 关 键 词： | 周跳 小波变换 边缘效应 延拓方式 |
Study on Selection of Extension Way in Wavelet Transformation for Detecting Cycle Slips |
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| FENG Lei,JI Chang-dong.Study on Selection of Extension Way in Wavelet Transformation for Detecting Cycle Slips[J].Geomatics & Spatial Information Technology,2017,40(5). |
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| Authors: | FENG Lei JI Chang-dong |
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| Abstract: | Wavelet transformation for detecting cycle slips is a very effective way,through a bandpass filter to extract some details on the scale signal and mutated to a certain scaling,which found the location cycle slip occurs,then the high-frequency coefficients Singular value interpolated,reconstruction and low-frequency coefficients,and then reconstruct the original observations and observations as the difference between rounding method to determine the value of cycle slips.This will spreadsheet effects of different extension methods on wavelet transform,use minimal "edge effect" extension of way for non-differential,single difference,double difference observations were db6 wavelet mesoscale decomposition,and to explore its single frequency cycle slip detection applications. |
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| Keywords: | cycle slips wavelet transformation edge effect extension way |
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