Finish tp1
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@ -11,6 +11,7 @@ Théorie du signal --- TP1
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\usepackage{enumitem}
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\usepackage{xfrac}
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\usepackage{tikz}
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\usepackage{float}
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\begin{document}
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@ -174,4 +175,79 @@ Théorie du signal --- TP1
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}
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\end{tikzpicture}
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\end{center}
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\clearpage
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\section{Partie pratique}
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\subsection{Signal triangle}
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Plus le nombre d'éléments de la somme est grand, plus la courbe se rapproche du signal d'origne.
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x1_temporel_n2.png}
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\caption{Pour $N=2$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x1_temporel_n5.png}
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\caption{Pour $N=5$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x1_temporel_n20.png}
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\caption{Pour $N=20$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x1_temporel_n100.png}
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\caption{Pour $N=100$}
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\end{figure}
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\subsection{Signal rectangle}
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\subsubsection{Signal temporel}
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Là encore, la somme des fonctions trigonométriques se rapproche du signal d'origine lorsque l'on prend en compte d'avantage d'éléments.
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_temporel_r2n2.png}
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\caption{Pour $r=\frac{1}{2}$ et $N=2$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_temporel_r2n5.png}
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\caption{Pour $r=\frac{1}{2}$ et $N=5$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_temporel_r2n20.png}
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\caption{Pour $r=\frac{1}{2}$ et $N=20$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_temporel_r2n100.png}
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\caption{Pour $r=\frac{1}{2}$ et $N=100$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_temporel_r3n100.png}
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\caption{Pour $r=\frac{1}{3}$ et $N=100$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_temporel_r4n100.png}
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\caption{Pour $r=\frac{1}{4}$ et $N=100$}
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\end{figure}
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\subsubsection{Signal fréquentiel (DSP)}
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L'échelle est très petite, et est centrée sur les fréquences positives.
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Mais nous voyons la moyenne, très élevée, par rapport aux autres crêtes (fondamentales + harmoniques) qui décroissent rapidement.
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Autour de 2000Hz, les crêtes croissent de nouveau, ce qui n'était pas visible dans la représentation manuelle de la première partie.
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_frequentiel_r2n20.png}
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\caption{Pour $r=\frac{1}{2}$ et $N=20$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_frequentiel_r3n20.png}
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\caption{Pour $r=\frac{1}{3}$ et $N=20$}
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\end{figure}
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\begin{figure}[H]
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\includegraphics[width=\linewidth]{./img/x2_frequentiel_r4n20.png}
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\caption{Pour $r=\frac{1}{4}$ et $N=20$}
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\end{figure}
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\end{document}
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