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資源簡介

經驗小波分解,通過ewt變換分解重構信號,實現對信號的降噪

資源截圖

代碼片段和文件信息

clear?all
clc
fs=5;
Ts=1/fs;
h=1/fs;???%時間步長
t=0:Ts:4095*Ts;
D=0.31;
a=1;
b=1;
s=0.3*sin(2*pi*0.01*t);
x1=s+sqrt(2*D)*randn(size(t));


y=fft(x14096);?
pyy=y.*conj(y)/4096;
ff=fs*(0:2048)/4096;


figure(1)
subplot(221)
plot(tx1‘k‘)
title(‘Input?signal?sn‘)
xlabel(‘Time‘)
ylabel(‘Amplitude‘)
subplot(222)
plot(ffpyy(1:2049)‘k‘)
xlabel(‘Frequency?‘)
ylabel(‘Amplitude‘)
title(‘Spectrum?of?input?signal?sn‘)
axis([-0.1?0.1?0?1000])

x=sr(abhx1);

y=fft(x4096);?
py=y.*conj(y)/4096;
ff=fs*(0:2048)/4096;


subplot(223)
plot(tx‘k‘)
title(‘Output?signal?x‘)
xlabel(‘Time‘)
ylabel(‘Amplitude‘)
subplot(224)
plot(ffpy(1:2049)‘k‘)
xlabel(‘Frequency‘)
ylabel(‘Amplitude‘)
title(‘Spectrum?of?output?signal?x‘)
axis([-0.1?0.1?0?1000])

%?[t

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????2184??2016-04-28?14:31??EWT\1D\disp_hhs2.asv

?????文件???????2220??2016-04-28?14:31??EWT\1D\disp_hhs2.m

?????文件???????2246??2016-04-28?14:31??EWT\1D\EWT1D.m

?????文件????????162??2016-04-28?14:31??EWT\1D\EWT_beta.m

?????文件???????1474??2016-04-28?14:31??EWT\1D\EWT_Meyer_FilterBank.m

?????文件????????920??2016-04-28?14:31??EWT\1D\EWT_Meyer_Scaling.m

?????文件???????1325??2016-04-28?14:31??EWT\1D\EWT_Meyer_Wavelet.m

?????文件???????1318??2016-04-28?14:31??EWT\1D\Hilbert_EWT.m

?????文件????????854??2016-04-28?14:31??EWT\1D\iEWT1D.m

?????文件????????708??2016-04-28?14:31??EWT\1D\Modes_EWT1D.m

?????文件???????1346??2016-05-10?17:04??EWT\1D\Show_EWT.m

?????文件????????977??2016-04-28?14:31??EWT\1D\Show_EWT_Boundaries.m

?????文件???????1442??2016-04-28?14:31??EWT\2D\Curvelet\AnglesLocalMax.m

?????文件???????2182??2016-04-28?14:31??EWT\2D\Curvelet\AnglesLocalMaxMin.m

?????文件???????9804??2016-04-28?14:31??EWT\2D\Curvelet\Angular_sector.m

?????文件???????1270??2016-04-28?14:31??EWT\2D\Curvelet\CreateAngleGrid.m

?????文件???????4892??2016-04-28?14:31??EWT\2D\Curvelet\EWT2D_Curvelet.m

?????文件???????8118??2016-04-28?14:31??EWT\2D\Curvelet\EWT2D_Curvelet_FilterBank.m

?????文件????????971??2016-04-28?14:31??EWT\2D\Curvelet\EWT2D_Curvelet_Scaling.m

?????文件???????3819??2016-04-28?14:31??EWT\2D\Curvelet\EWT_Angles_Detect.m

?????文件????????856??2016-04-28?14:31??EWT\2D\Curvelet\iEWT2D_Curvelet.m

?????文件????????736??2016-04-28?14:31??EWT\2D\Curvelet\ShowCurveletFilters.m

?????文件???????4532??2016-04-28?14:31??EWT\2D\Curvelet\Show_Curvelets_boundaries.m

?????文件????????713??2016-04-28?14:31??EWT\2D\Curvelet\Show_EWT2D_Curvelet.m

?????文件????????338??2016-04-28?14:31??EWT\2D\drawArcEllipse.m

?????文件????????179??2016-04-28?14:31??EWT\2D\drawCircle.m

?????文件????????182??2016-04-28?14:31??EWT\2D\drawEllipse.m

?????文件???????2323??2016-04-28?14:31??EWT\2D\Littlewood-Paley\EWT2D_LittlewoodPaley.m

?????文件???????1529??2016-04-28?14:31??EWT\2D\Littlewood-Paley\EWT2D_Meyer_FilterBank.m

?????文件???????1011??2016-04-28?14:31??EWT\2D\Littlewood-Paley\EWT2D_Meyer_Scaling.m

............此處省略79個文件信息

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