T. P. Traitement du Signal MaÃ®trise E.E.A. - LASC

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6 SPTool: A Signal Processing GUI Suite sptool The SPTool window is displayed. 3 Select Import from the File menu in SPTool. The Import to SPTool dialog opens. The variable x is displayed in the Workspace Contents list. (If it is not, select the From Workspace radio button to display the contents of the workspace.) 4 Select the signal and import it into the Data field: a b c d e Make sure that Signal is selected in the Import As pull-down menu. Select the signal variable x in the Workspace Contents list. Click on the arrow to the left of the Data field or type x in the Data field. Type 5000 in the Sampling Frequency field. Name the signal by typing noise in the Name field. f Press OK. At this point, the signal noise[vector] is selected in SPTool’s Signals list. 6-22
Filtering and Analysis of Noise Note You can import filters and spectra into SPTool in much the same way as you import signals. See “Importing Filters and Spectra into SPTool” on page 6-40 for specific details. You can also import signals from MAT-files on your disk, rather than from the workspace. See “Loading Variables from the Disk” on page 6-44 for more information. Type help sptool for information about importing from the command line. Step 2: Designing a Filter You can import an existing filter into SPTool, or you can design and edit a new filter using the Filter Designer. In this example: 1 Open a default filter in the Filter Designer. 2 Specify an equiripple bandpass FIR filter. Opening the Filter Designer To open the Filter Designer, press the New button in SPTool. This opens the Filter Designer with a default filter named filt1. Specifying the Bandpass Filter Design an equiripple bandpass FIR filter with the following characteristics: • Sampling frequency of 5000 Hz • Stopband frequency ranges of [0 500] Hz and [1500 2500] Hz • Passband frequency range of [750 1250] Hz • Ripple in the passband of 0.01 dB • Stopband attenuation of 75 dB To modify your filter in the Filter Designer to meet these specifications: 6-23
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T. P. Traitement du Signal Maîtris
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a=[1 2; 3 4] et le résultat suivan
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y=exp(i*2*pi*t) que l’on rencontr
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t=0:T/N:T-T/N; y=t.^2+5; plot(t,y);
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t f ∫ t0 f ( t) dt t ⎡ N −1 e
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TP 2 : ANALYSE ET SYNTHÈSE DE SIGN
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Relations entre la série de Fourie
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) Rampe Montrer que: c) Signal modu
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- Pour le signal c), vérifiez que
Page 22 and 23: Cette figure montre bien qu’il es
Page 24 and 25: N correspond aux nombres d’échan
Page 26 and 27: 2) Travail demandé 2-1) Analyse d
Page 29 and 30: TP 4 : UTILISATION DE LA TFD POUR L
Page 31 and 32: N −1 ∑ x( p)* y( p) = x( m) y(
Page 33: c) Autocorrélation d'un sinus brui
Page 36 and 37: Le schéma de principe qui peut s'a
Page 38: R p =3dB Rs=30dB f P1 =95kHz f P2 =
Page 45 and 46: H ( f ) Etant donné que est pério
Page 47: - Calculer les valeurs de la répon
Page 50 and 51: Exercice1 : comparaison des résult
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T. P. Traitement du Signal MaÃ®trise E.E.A. - LASC

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