modulation et multiplexage, simulation

8/17/2019 Modulation et multiplexage, simulation

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MASTER SIGNAUX ET SYSTÈME

Travaux Pratiques

deTélécommunicationet Traitement de

SignalSimulation avec Matlab

- BOUSSIK Zakaria

- LK!"I# $ouad


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Figure 1 :

Figure1- Modulation AM


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1(i)=s(/)

/=1/;

2(i)=s(/);

/=1/;

(i)=s(/);

/=1/; !(i)=s(/);

/=1/;

en

fiure

su&plot(!11)

plot(1)

title('emultipleae')

su&plot(!12)

plot(2)

su&plot(!1)

plot()su&plot(!1!)

plot(!)

Figure 2:


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Figure2- Multiplexage

Figure 3:


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Figure3- Démultiplexage

Ondelettes


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Script 3 :

clc;clear all;close all;

34=10U4=10

6=100

t=linspace(34U46);

=ep((t.72)#2).cos(5t);

su&plot(551);

plot();

s=5.cos(2pi.t200)cos(2pi100t)8.cos(2pi1000t);

su&plot(552);

plot(ts);

a=1;

&=0;c=2;

for a=1:5;

for &=:9;

c=c1;

1=(1#srt(a)).ep((((t&)#a).72)#2).cos(5((t&)#a));

su&plot(55c)

=con


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Figure 4 :

:

Figure4- Déplacement d’ondelette


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Figure 5 :

Figure5- Dilatation d’ondelette


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Figure 6 :

Figure6- Produit du signal aec les ondelettes


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Spectrogramme

Script 4:

clc;

clear all;

close all;

f0=100;

"0=1#f0;

"=10"0;

fe=25f0;

"e=1#fe;

t=0:"e:"#2"e;

=9sin(2pif0t);

6=100; %%%%%loneur e la fenetre

6f=10; %%%%%n&re e fenetre

pos=>;

for /=1:6#6f:lent+()6

+=a&s(fft((/:(/61))));

s=+';

pos=pos s(1:floor(lent+(s)#2))>;en

spectre=pos.pos;

?=(0:floor(6#2))#6fe;

"=(6#2:6#6f:lent+()1 6#2)#fe;%%%%normalisation u temps

@=imaesc("?spectre);title('spectrepromme proramm');

colormap($et);%%%%%pour la coleur

set(et(@ '@arent') 'Bir''normal');%%%%%ren


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Figure 7:

Figure!- "pectrogramme programmé


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igner !ille

Script 5:

clear all; clc; close all;

a=;

f0=5;

f1=10;

f2=5;

fe=80;

"e=1#fe;

f=259;

t=(0:f);

=a(sin(2pitf0#fe)sin(2pitf1#fe))';

z=tfrspC


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Figure ":

Fig

ure#- $igner %ille

modulation et multiplexage, simulation

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