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decomposition

于 2021-04-13 发布 文件大小:2KB
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代码说明:

  运行emd,得到输入信号X的固有模态函数(imf),每列代表着信号X的一阶分量,X就是我们采集的信号。 hhtdn是hht去噪的程序,可以不看,仅看emd 和 findpeaks wvtdn是wavelet去噪程序,如果只是分解信号,仅用下面的语句即可 [C,L] = wavedec(x_noise,dl,wn); x_noise就是我们采集的信号,dl是分解的阶数,wn是分解的母小波名称(% Empiricial Mode Decomposition (Hilbert-Huang Transform) % imf = emd(x) % Func : findpeaks)

文件列表:

decomposition
decomposition\emd.m, 862, 2014-11-12
decomposition\emd_1.m, 382, 2017-11-30
decomposition\findpeaks.m, 146, 2014-11-11
decomposition\hhtdn.m, 440, 2015-06-05
decomposition\wvtdn.m, 268, 2015-06-08
decomposition\说明.txt, 308, 2017-11-16

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  • harmwave
    关于小波分析的程序,用于分析振动信号的程序,很好用(Wavelet analysis on the procedures used to analyze the vibration signal of procedures, very good use)
    2008-12-17 09:23:29下载
    积分:1
  • tei_kr12
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    2017-05-27 14:13:25下载
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    希尔伯特变换法提取零相位子波的小程序,很好用!!(Hilbert transform method to extract the zero-phase wavelet procedure, easy to use! !)
    2012-03-05 20:11:06下载
    积分:1
  • secgenwav
    Second generation wavelets and applications
    2010-05-17 03:23:57下载
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    结合离散小波变换(DWT)技术,利用DWT与HVS相结合的良好特性,探索和建立了一种新的图像质量客观评价方法(taking advantage of the similarities of discrete wavelet transform (DWT) with HVS,a new methods for integrated image quality assessment)
    2009-05-19 18:41:31下载
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  • lifting_denoising
    利用小波提升算法实现了第二代小波变换,将之应用在信号去噪中,实现了数据的边界对称延拓,去噪效果较好.(Wavelet Lifting algorithm using the second generation wavelet transform, to be used in signal de-noising, the realization of the data symmetric boundary extension, denoising better.)
    2007-12-21 10:42:46下载
    积分:1
  • wtquzao
    说明:  小波阈值去噪,用于对以为信号降噪处理,代码为matlab代码,亲测有效(Wavelet threshold denoising)
    2019-06-21 09:20:45下载
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    小波变换(wavelet transform,WT)是一种新的变换分析方法,它继承和发展了短时傅立叶变换局部化的思想,同时又克服了窗口大小不随频率变化等缺点,能够提供一个随频率改变的"时间-频率"窗口,是进行信号时频分析和处理的理想工具。它的主要特点是通过变换能够充分突出问题某些方面的特征,能对时间(空间)频率的局部化分析,通过伸缩平移运算对信号(函数)逐步进行多尺度细化,最终达到高频处时间细分,低频处频率细分,能自动适应时频信号分析的要求,从而可聚焦到信号的任意细节,解决了Fourier变换的困难问题,成为继Fourier变换以来在科学方法上的重大突破。(Wavelet transform (WT) is a new transform analysis method. It inherits and develops the idea of localization of short-time Fourier transform and overcomes the shortcomings that window size does not vary with frequency. It can provide a frequency-dependent The Time-Frequency window is ideal for time-frequency analysis and processing of signals. Its main feature is that by transforming some features that can fully highlight some aspects of the problem, the localization of the time (space) frequency can be analyzed, and the signal (function) can be gradually and multi-scale refined by the scaling operation, finally reaching the high frequency Time subdivision, frequency subdivision at low frequencies, can automatically adapt to the requirements of time-frequency signal analysis, which can focus on any details of the signal to solve the difficulties of Fourier transform has become a major breakthrough in the scientific method since Fourier transform.)
    2018-03-05 14:32:13下载
    积分:1
  • tsxbxz
    本程序实现了db2提升小波的消噪,可直接运行成功。(This program achieved a db2 lifting wavelet denoising can be directly run successfully.)
    2009-11-03 09:36:52下载
    积分:1
  • youyulvboqi
    理解有源滤波器的工作原理、性能特点。学习有源滤波器的设计方法。(Understand the working principle of active filter performance characteristics. Learning active filter design methods.)
    2020-10-26 21:59:59下载
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