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annotate testing/utp_1.1/utps/ao/reference_files/create_ref_psd.m @ 49:0bcdf74587d1 database-connection-manager

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Cleanup
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 07 Dec 2011 17:24:36 +0100
parents 409a22968d5e
children
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1 % CREATE_REF_PSD creates a reference psd
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2 %
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3 % M Nofrarias 20-01-09
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4 %
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5 % $Id: create_ref_psd.m,v 1.2 2009/02/13 14:31:05 mauro Exp $
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6 %
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7
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8 % <MethodDescription>
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9 %
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10 % The method uses computes the psd of known white noise using MATLAB's
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11 % pwelch
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12 %
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13 % </MethodDescription>
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14
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15 function create_ref_psd()
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16
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17 % <AlgoCode>
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18
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19 % analyzes reference object: 10 s at 1000 Hz, sigma = 1
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20 a = ao('ref_whitenoise_10s_1000Hz.xml');
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21
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22 Nfft = 2*a.data.fs;
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23 win = specwin('Hanning', Nfft);
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24 [pxx, f] = pwelch(a.data.y, win.win, Nfft*win.rov/100, Nfft, a.data.fs);
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25
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26 out = [f pxx];
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28 save('ref_psd_10s_1000Hz.txt','out','-ascii','-double');
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30 % analyzes reference object: 3600 s at 1 Hz, sigma = 3e-4
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31 a = ao('ref_whitenoise_3600s_1Hz.xml');
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32
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33 Nfft = 1000;
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34 win = specwin('BH92', Nfft);
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35 [pxx, f] = pwelch(a.data.y, win.win, Nfft*win.rov/100, Nfft, a.data.fs);
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37 out = [f pxx];
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39 save('ref_psd_3600s_1Hz.txt','out','-ascii','-double');
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40
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41 % analyzes reference object: 100000 s at 0.1 Hz, sigma = 4e-12
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42 a = ao('ref_whitenoise_100000s_100mHz.xml');
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43
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44 Nfft = a.data.fs * a.data.nsecs;
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45 psll = 100;
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46 win = specwin('Kaiser', Nfft, psll);
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47 [pxx, f] = pwelch(a.data.y, win.win, Nfft*win.rov/100, Nfft, a.data.fs);
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49 out = [f pxx];
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50
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51 save('ref_psd_100000s_100mHz.txt','out','-ascii','-double');
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52
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53 % </AlgoCode>
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56 end