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

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6 SPTool: A Signal Processing GUI Suite Editing Signals, Filters, or Spectra in SPTool You can edit selected items in SPTool by: 1 Selecting the names of the signals, filters, or spectra you want to edit. 2 Selecting the appropriate Edit menu item: - Duplicate to copy an item in an SPTool list - Clear to delete an item in an SPTool list - Name to rename an item in an SPTool list - Sampling Frequency to modify the sampling frequency associated with either a signal (and its associated spectra) or filter in an SPTool list The pull-down menu next to each menu item shows the names of all selected items. You can also edit the following signal characteristics by right-clicking in the display region of the Signal Browser, the Filter Visualization Tool, or the Spectrum Viewer: • The signal name • The sampling frequency • The line style properties Note If you modify the sampling frequency associated with a signal’s spectrum using the right-click menu on the Spectrum Viewer display region, the sampling frequency of the associated signal is automatically updated. 6-46
Designing a Filter with the Pole/Zero Editor Designing a Filter with the Pole/Zero Editor To design a filter transfer function using the Filter Designer Pole/Zero Editor: 1 Select the Pole/Zero Editor option from the Algorithm list to open the Pole/Zero Editor in the Filter Designer display. 2 Enter the desired filter gain in the Gain edit box. 3 Select a pole or zero (or conjugate pair) by selecting one of the (pole) or (zero) symbols on the plot. 4 Choose the coordinates to work in by specifying Polar or Rectangular from the Coordinates list. 5 Specify the new location(s) of the selected pole, zero, or conjugate pair by typing values into the Mag and Angle fields (for angular coordinates) or X and Y (for rectangular coordinates) fields. Alternatively, position the poles and zeros by dragging the and symbols. 6 Use the Conjugate pair check box to create a conjugate pair from a lone pole or zero, or to break a conjugate pair into two individual poles or zeros. Design a new filter or edit an existing filter in the same way. Note Keep the Filter Visualization Tool (FVTool) open while designing a filter with the Pole/Zero Editor. Any changes that you make to the filter transfer function in the Pole/Zero Editor are then simultaneously reflected in the response plots of FVTool. 6-47
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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
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Cette figure montre bien qu’il es
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N correspond aux nombres d’échan
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2) Travail demandé 2-1) Analyse d
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TP 4 : UTILISATION DE LA TFD POUR L
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N −1 ∑ x( p)* y( p) = x( m) y(
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c) Autocorrélation d'un sinus brui
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Le schéma de principe qui peut s'a
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R p =3dB Rs=30dB f P1 =95kHz f P2 =
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T. P. Traitement du Signal MaÃ®trise E.E.A. - LASC

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