File:Window function (rectangular).svg
Size of this PNG preview of this SVG file: 800 × 307 pixels. Other resolutions: 320 × 123 pixels | 640 × 246 pixels | 1,024 × 393 pixels | 1,280 × 492 pixels | 901 × 346 pixels.
Original file (SVG file, nominally 901 × 346 pixels, file size: 472 KB)
|
This is a file from the Wikimedia Commons. The description on its description page there is shown below.
|
.svg){kind=small}
|
This file has been superseded by Window function and frequency response - Rectangular.svg. It is recommended to use the other file. Please note that deleting superseded images requires consent.
|
|
Summary
| Description |
English: rectangular window and frequency response |
||
| Date | |||
| Source | Own work I saved both plots in EPS, then I converted them to SVG with Scribus and merged them with Inkscape | ||
| Author | Bob K, converted to SVG by Alessio Damato | ||
| Permission (Reusing this file) |
|
||
| Other versions |
This file was derived from: Window function (rectangular).png |
||
| SVG development |  |
||
| Matlab source |
click to expand
This graphic was created with the help of the following script: 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')
|
.png){kind=link}
Improvements
|
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.
|
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 12:12, 22 October 2007 | 901 × 346 (472 KB) | Alejo2083 | == Summary == {{Information |Description= rectangular window and frequency response |Source=self-made |Date=14-Dec-2005 |Author= Bob K, converted to SVG by ~~~ }} source: http://en.wikipedia.org/wiki/Window_Function author: http://en.wiki |
File usage
The following page uses this file:
.svg){kind=link}