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COURS DE DSP (Digital Signal Processor) Partie 3: Filtres Alain Fruleux

COURS DE DSP (Digital Signal Processor) Partie 3: Filtres Alain Fruleux. I S E N 2006. Implantation d ’un filtre FIR. 1 Cahier des Charges à partir d ’un gabarit: fréquence de coupure Vp= 0.16 (fe=1; Ve=0.5) bande de transition 0.15 Vs=0.15+0.16=0.31 oscillation dans la BP et BA =0.1

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COURS DE DSP (Digital Signal Processor) Partie 3: Filtres Alain Fruleux

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  1. COURS DE DSP(Digital Signal Processor)Partie 3: FiltresAlain Fruleux I S E N 2006

  2. Implantation d ’un filtre FIR • 1 Cahier des Charges à partir d ’un gabarit: • fréquence de coupure Vp= 0.16 (fe=1; Ve=0.5) • bande de transition 0.15 Vs=0.15+0.16=0.31 • oscillation dans la BP et BA =0.1 • 2 On calcule P=M/2 ( M=4.44 majoré à 6 donc P=3) • On calcule les coefficients hn de h0 à h6 • On multiplie par la fenêtre de Hanning

  3. + + + + + xn xn-1 xn-2 xn-3 Z -1 Z -1 Z -1 xn-5 xn-4 Z -1 Z -1 h1 h2 h3 yn Structure du filtre • Ceci permet de mieux comprendre l ’analyse de l ’exercice 6

  4. 2.3.1 Virgule Fixe (Q15) • Exemple d ’un Nombre positif

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