File:Window function (hann).svg
| Uploaded by | Alejo2083 |
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| Upload date | 2007-10-22T20:27:36Z |
| MIME type | image/svg+xml |
| Dimensions | 906 × 346 px |
| File size | 476.8 KB |
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This file has been superseded by Window function and frequency response - Hann.svg. It is recommended to use the other file. Please note that deleting superseded images requires consensus.
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Summary
| Description |
English: Hann window and frequency response. I saved both plots in EPS, then I converted them to SVG with Scribus and merged them with Inkscape |
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| Date | ||||||
| Source | Own work based on: Window function (hann).png by Bob K | |||||
| Author |
Vector: |
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| Other versions |
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| SVG development |
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Licensing
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This work has been released into the public domain by its author, Alessio Damato. This applies worldwide. In some countries this may not be legally possible; if so: Alessio Damato grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law. |
Source code
This graphic was created with the help of the following Matlab script:
N=128;
k=0:N-1;
dr = 100;
w = 0.5 - 0.5*cos(2*pi*k/(N-1));
B = N*sum(w.^2)/sum(w)^2 % noise bandwidth (bins)
H = abs(fft([w zeros(1,7*N)]));
H = fftshift(H);
H = H/max(H);
H = 20*log10(H);
H = max(0,dr+H);
figure
area(k,w,'FaceColor', [0 .4 .6])
xlim([0 N-1])
set(gca,'XTick', [0 : 1/8 : 1]*(N-1))
set(gca,'XTickLabel','0| | | | | | | |N-1')
grid on
ylabel('amplitude')
xlabel('samples')
title('Window function (Hann)')
figure
stem(([1:(8*N)]-1-4*N)/8,H,'-');
set(findobj('Type','line'),'Marker','none','Color',[.871 .49 0])
xlim([-4*N 4*N]/8)
ylim([0 dr])
set(gca,'YTickLabel','-100|-90|-80|-70|-60|-50|-40|-30|-20|-10|0')
grid on
ylabel('decibels')
xlabel('DFT bins')
title('Frequency response (Hann)')
Category:Files with derivative versions
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Category:Images with MATLAB source code
Category:PD-self
Category:Self-published work
Category:Short-time Fourier transform
Category:Superseded
Category:Valid SVG created with Inkscape
Category:Vectorizations
Category:Window function