From bab8a442c634e2d1b9a1f6ef59293f1c93455ca7 Mon Sep 17 00:00:00 2001
From: PERBEN Anatole <anatole.perben@imt-atlantique.net>
Date: Wed, 28 May 2025 23:28:41 +0000
Subject: [PATCH] Upload New File

---
 src/wav/question_3_3.m | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 src/wav/question_3_3.m

diff --git a/src/wav/question_3_3.m b/src/wav/question_3_3.m
new file mode 100644
index 0000000..60291c6
--- /dev/null
+++ b/src/wav/question_3_3.m
@@ -0,0 +1,23 @@
+% Charger les données
+load("signal_excitation.mat");  % xe1, xe2, fe sont chargés
+
+% Autocorrélation (centrée)
+rxe1 = xcorr(xe1, 'biased');
+rxe2 = xcorr(xe2, 'biased');
+
+% Axe des lags
+lags1 = -length(xe1)+1:length(xe1)-1;
+lags2 = -length(xe2)+1:length(xe2)-1;
+
+% Affichage
+subplot(2,1,1);
+plot(lags1, rxe1);
+title('Autocorrélation de xe1');
+xlabel('Décalage');
+ylabel('Amplitude');
+
+subplot(2,1,2);
+plot(lags2, rxe2);
+title('Autocorrélation de xe2');
+xlabel('Décalage');
+ylabel('Amplitude');
\ No newline at end of file
-- 
GitLab