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

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6 SPTool: A <strong>Signal</strong> Processing GUI Suite Parameter m order Rp Rs setOrderFlag type w3db wind Wn wt Description The response magnitudes corresponding to the band-edge frequencies in f. Filter order. Passband ripple (dB) Stopband attenuation (dB) Contains 1 if the filter order was specified manually (i.e., the Minimum Order box in the Specifications region was not selected). Contains 0 if the filter order was computed automatically. Contains 1 for lowpass, 2 for highpass, 3 for bandpass, or 4 for bandstop. -3 dB frequency for Butterworth IIR designs. Vector of Kaiser window coefficients. Cutoff frequency for the Kaiser window FIR filter when setOrderFlag = 1. Vector of weights, one weight per frequency band. Accessing Parameters in a Saved Spectrum The following structure fields describe the spectra saved by SPTool. Field P f Description The spectral power vector. The spectral frequency vector. 6-38
Accessing Filter Parameters Field confid Description A structure containing the confidence intervals data • The confid.level field contains the chosen confidence level. • The confid.Pc field contains the spectral power data for the confidence intervals. • The confid.enable field contains a 1 if confidence levels are enabled for the power spectral density. signalLabel Fs The name of the signal from which the power spectral density was generated. The associated signal’s sample rate. You can access the information in these fields as you do with every MATLAB structure. For example, if you export an SPTool PSD estimate spect1 to the workspace, type spect1.P to obtain the vector of associated power values. 6-39
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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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T. P. Traitement du Signal MaÃ®trise E.E.A. - LASC

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