File:Window function (rectangular).svg
Summary
| Description |
English: Rectangular 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 (rectangular).png by Bob K | |||
| Author | Alessio Damato | |||
| Other versions |
Derivative works of this file: Window function and frequency response - Rectangular.svg:  Category:Files with derivative versions |
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| SVG development | Category:Valid SVG created with Inkscape#Window%20function%20(rectangular).svg
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.png){kind=link}
.svg){kind=link}
Source code
This media was created with MATLAB (numerical computing environment)Category:Images with MATLAB source code
Here is a listing of the source used to create this file.
Here is a listing of the source used to create this file.
N=128;
k=0:N-1;
dr = 60;
w = ones(1,N);
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])
ylim([0 2])
set(gca,'XTick', [0 : 1/8 : 1]*(N-1))
set(gca,'XTickLabel','0| | | | | | | |N-1')
grid on
ylabel('amplitude')
xlabel('samples')
title('Window function (rectangular)')
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','-60|-50|-40|-30|-20|-10|0')
grid on
ylabel('decibels')
xlabel('DFT bins')
title('Spectral "leakage" from a rectangularly windowed sinusoid')
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. |
.svg){kind=link}
.svg){kind=link}
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This image (or all images in this category) uses inside labels or attached captions in a specific script or language and should be converted to a language neutral form. This would allow its use in all Wikimedia projects and, more importantly, all Wikimedia languages.
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.svg){kind=link}