Description: 基于小波和fft的电能质量检测:扰动检测,稳态检测-Fft based on wavelet and the power quality detection: disturbance detection, steady-state testing Platform: |
Size: 10240 |
Author: |
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Description: 基于fft和二进小波编写的二维小波多孔算法图像分解，效果不错-Fft and based on dyadic wavelet algorithm for the preparation of porous two-dimensional wavelet image decomposition, good results Platform: |
Size: 1024 |
Author:刘民 |
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Description: The Hilbert–Huang method is presented with modifications,
for time-frequency analysis of distorted power quality signals.
The empirical mode decomposition (EMD) is enhanced with
masking signals based on fast Fourier transform (FFT), for separating
frequencies that lie within an octave. Further, the instantaneous
frequency and amplitude of the constituent modes obtained
by Hilbert spectral analysis are improved by demodulation. The
method shows promising time-frequency-magnitude localization
capabilities for distorted power quality signals. The performance
of the new technique is compared with that of another multiresolution
analysis tool, the S-transform—a phase corrected wavelet
transform. Analysis on actual measurements of transformer inrush
current from an existing laboratory setup is used to demonstrate
this technique. Platform: |
Size: 835584 |
Author:imed |
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Description: 基于matlab的电能质量检测仿真，其中包含小波变换，S变换，FFT，dq变换，直接打开Mypower就可运行，没有界面。-Matlab-based simulation of power quality detection, which contains the wavelet transform, S transform, FFT, dq transformation directly open Mypower can run, there is no interface. Platform: |
Size: 190464 |
Author:panfenghou |
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Description: OFDM is multicarrier modulation (MCM) technique which provides an efficient means to
handle high speed data streams on a multipath fading environment that causes ISI. Normally
OFDM is implemented using FFT and IFFT’s. To decrease the BW waste brought by adding
cyclic prefix, wavelet based OFDM is employed.-OFDM is multicarrier modulation (MCM) technique which provides an efficient means to
handle high speed data streams on a multipath fading environment that causes ISI. Normally
OFDM is implemented using FFT and IFFT’s. To decrease the BW waste brought by adding
cyclic prefix, wavelet based OFDM is employed. Platform: |
Size: 37888 |
Author:awatif |
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Description: OFDM is multicarrier modulation (MCM) technique [1] which provides an efficient means to
handle high speed data streams on a multipath fading environment that causes ISI. Normally
OFDM is implemented using FFT and IFFT’s. To decrease the BW waste [4] brought by adding
cyclic prefix, wavelet based OFDM is employed. Platform: |
Size: 1024 |
Author:awatif |
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Description: 基于kaiser窗的双谱线插值FFT谐波分析，采用了小波去噪的思想，主要是基于mtlab的程序，包括调制，解调，信噪比计算，均值便宜跟踪的示例，微分方程组数值解方法，一些自适应信号处理的算法。- Dual-line interpolation FFT harmonic analysis kaiser windows, Using wavelet denoising thought, Mainly based on the mtlab procedures, Includes the modulation, demodulation, signal to noise ratio calculation, Example tracking mean cheap, Numerical solution of differential equations method, Some adaptive signal processing algorithms. Platform: |
Size: 6144 |
Author:jnafxep |
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Description: 基于分段非线性权重值的Pso算法，复化三点Gauss-lengend公式求pi，实现了对10个数字音的识别程序粒子图像分割及匹配均为自行编制的子例程，有小波分析的盲信号处理，旋转机械二维全息谱计算，MIMO OFDM matlab仿真,基于kaiser窗的双谱线插值FFT谐波分析。- Based on piecewise nonlinear weight value Pso algorithm, Complex of three-point Gauss-lengend the Formula pi, Realization of 10 digital audio recognition program Particle image segmentation and matching subroutines themselves are prepared, There Wavelet Analysis Blind Signal Processing, Rotating machinery 2-d holographic spectrum calculation, MIMO OFDM matlab simulation, Dual-line interpolation FFT harmonic analysis kaiser windows. Platform: |
Size: 8192 |
Author:ddwgug |
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Description: 有小波分析的盲信号处理，ofdm系统仿真 含16qam调制 fft 加窗 加cp等模块，基于人工神经网络的常用数字信号调制。- There Wavelet Analysis Blind Signal Processing, ofdm system simulation including 16qam modulation fft windowing modules plus cp, The commonly used digital signal modulation based on artificial neural network. Platform: |
Size: 6144 |
Author:kan |
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Description: 小波变换进行变速箱故障诊断
首先将s1和s2信号时域谱（s1代表维修前的振动信号，s2代表维修后的振动信号），画出来进行对比，会发现s1信号的振动幅值会比较高；然后对s1和s2分别进行小波分解并画出各层的时域谱，只对比s1和s2分后的最高时域谱，s2更加的具有周期性，且幅值较小，s2周期性不够明显，且振动过于密集。分析完时域谱后开始分析频谱，首先对原信号s1和s2fft转换，得到频谱图，如图，然后再对小波分析后高频部分进行fft转换，做出频谱图。对比后我们发现，在f 2375HZ出（也就是齿轮的啮合频率），s1信号频谱幅值会有急剧的升高，然后，其谐波的幅值也会增大。所以可以推断出该维修前的增速箱的齿轮可能出现问题。-Gearbox fault diagnosis based on wavelet transform s1 and s2 first time domain signal spectrum (s1 behalf of the vibration signal before maintenance, vibration signal s2 representative of repaired), drawn comparison, you will find a signal s1 vibration amplitude will be higher then s1 and s2 respectively wavelet decomposition and draw the layers of time-domain spectrum to only a maximum time domain spectroscopy s1 and s2 points after, s2 is more cyclical and smaller magnitude, s2 cyclical enough obviously, and the vibration is too dense. End domain spectral analysis after the beginning of the spectrum analysis, the first of the original signal s1 and s2fft conversion to give the spectrum, as shown, and then after the high frequency part of wavelet analysis fft transformation to make spectrum. We found that after the comparison, at f 2375HZ out (i.e. the gear mesh frequency), there will be a sharp increase in the amplitude spectrum of the signal s1, and then, the amplitude of the ha Platform: |
Size: 2048 |
Author:lililili |
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Description: video watemarking using wavelet and fft based transforms.video watemar king using wavelet and fft based transforms.video watemarking using wavelet and fft based transforms.-video watemarking using wavelet and fft based transforms.video watemarking using wavelet and fft based transforms.video watemarking using wavelet and fft based transforms.video watemarking using wavelet and fft based transforms. Platform: |
Size: 354304 |
Author:Aswathy Mohan |
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Description: 本文提出一种基于频率切片小波变换和谱峭度的综合算法。首先对轴承端的振动信号时频分析，采用FFT、包络谱、频率切片小波变换对其频域性能进行分析，再求其峭度谱与对应包络谱，结合其时域、频域性能，综合分析轴承故障。-This paper presents a synthesis algorithm based on frequency slice wavelet transform and spectral kurtosis. Firstly, the time-frequency analysis of the vibration signal at the bearing end is analyzed. The frequency domain performance is analyzed by FFT, envelope spectrum and frequency slice wavelet transform. Then the kurtosis spectrum and the corresponding envelope spectrum are analyzed. Combining its time domain, frequency domain performance, Comprehensive analysis of bearing failure. Platform: |
Size: 267264 |
Author:张雪 |
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Description: This is the second energy entropy matlab code, Based on wavelet transform digital watermarking algorithm matlab code, Dual-line interpolation FFT harmonic analysis kaiser windows. Platform: |
Size: 9216 |
Author:guilenpingtai
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Description: Based on wavelet transform digital watermarking algorithm matlab code, ofdm system simulation including 16qam modulation fft windowing modules plus cp, Using MATLAB dynamic clustering or iterative self-organizing data analysis. Platform: |
Size: 7168 |
Author:sailiuyao
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