From 975041a2a8f441475267caec588fd7d0e6867a76 Mon Sep 17 00:00:00 2001
From: YE Victor <victor.ye@imt-atlantique.net>
Date: Tue, 27 May 2025 16:17:35 +0000
Subject: [PATCH] Upload New File
---
src/SAR2Q1bis.m | 43 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 43 insertions(+)
create mode 100644 src/SAR2Q1bis.m
diff --git a/src/SAR2Q1bis.m b/src/SAR2Q1bis.m
new file mode 100644
index 0000000..74e70ca
--- /dev/null
+++ b/src/SAR2Q1bis.m
@@ -0,0 +1,43 @@
+% Paramètres
+T = 1; % période du signal
+Fe = 1000; % fréquence d'échantillonnage
+Te = 1/Fe;
+t = 0:Te:5*T-Te; % 5 périodes
+N = length(t);
+
+% Signal carré
+carre = square(2*pi*t/T); % amplitude ±1
+
+% Signal dent de scie
+scie = sawtooth(2*pi*t/T); % amplitude ±1
+
+% FFT et centrage
+Carre_FFT = fftshift(fft(carre));
+Scie_FFT = fftshift(fft(scie));
+f = (-N/2:N/2-1)*(Fe/N);
+
+% Amplitudes linéaires normalisées
+Carre_amp = abs(Carre_FFT)/N;
+Scie_amp = abs(Scie_FFT)/N;
+
+% Limite à 0–50 Hz
+indices = find(f >= 0 & f <= 50);
+f_zoom = f(indices);
+Carre_zoom = Carre_amp(indices);
+Scie_zoom = Scie_amp(indices);
+
+% Affichage du signal carré
+figure;
+plot(f_zoom, Carre_zoom);
+title('Spectre du signal carré (amplitude linéaire)');
+xlabel('Fréquence (Hz)');
+ylabel('Amplitude');
+grid on;
+
+% Affichage du signal dent de scie
+figure;
+plot(f_zoom, Scie_zoom);
+title('Spectre du signal dent de scie (amplitude linéaire)');
+xlabel('Fréquence (Hz)');
+ylabel('Amplitude');
+grid on;
\ No newline at end of file
--
GitLab