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+$S$ : Symbole rate $\left[ \frac{symbol}{s} \right]$
+$B_{Ba}$ : Baseband bandwidth $[Hz]$ - Largeur de la plage de fréquence du signal avant modulation
+$B_{Br}$ : Broadband bandwidth $[Hz]$ - Largeur de la plage de fréquence totale disponible pour la modulation (ou du signal modulé)
+ + +## AM - ASK Modulation de l'Amplitude ![transmission_process-transmission_radio-am.png](medias%2Ftransmission_process-transmission_radio-am.png) -## FM +$$\begin{align} +B_{Ba} &= \frac{1}{2}\left[ \frac{Hz}{\frac{symbol}{s}} \right] *S\left[ \frac{symbol}{s} \right]\\ +B_{Br} &= 2*B_{Ba} +\end{align}$$ + +## FM - FSK Modulation de la Fréquence ![transmission_process-transmission_radio-fm.png](medias%2Ftransmission_process-transmission_radio-fm.png) -## PM +$\beta$ : Index de modulation
+$f_{c}$ : Fréquence de la porteuse
+$f_{0}$ : Fréquence pour le symbole `0`
+$f_{1}$ : Fréquence pour le symbole `1`
+ +$$\begin{align} +B_{Ba} &= \frac{1}{2}\left[ \frac{Hz}{\frac{symbol}{s}} \right] *S\left[ \frac{symbol}{s} \right]\\ +\beta &= \frac{2\Delta f}{S} \\ +f_{0} &= f_{c}-\Delta f \\ +B_{Br} &= 2*B_{Ba} + 2*\Delta f = (1+\beta)*S +\end{align}$$ + +## PM - PSK Modulation de la Phase ![transmission_process-transmission_radio-pm.png](medias%2Ftransmission_process-transmission_radio-pm.png) + +$$\begin{align} +B_{Ba} &= \frac{1}{2}\left[ \frac{Hz}{\frac{symbol}{s}} \right] *S\left[ \frac{symbol}{s} \right]\\ +B_{Br} &= 2*B_{Ba} +\end{align}$$