Xnologiyalari

MUHAMMAD AL XORAZMIY NOMIDAGI
TOSHKЕNT AXBOROT TЕXNOLOGIYALARI UNIVЕRSITЕTI
“Raqamli aloqa” fanidan

Amaliy ish

№ 4

Mavzu: Amplitudaviy modulyatsiyalangan signal. Demodulyatsiyalash.

Bajardi: 811-18 guruh
Nurmatov Zafar.
Tekshirdi: Norov. E
TATU – 2021

Dastur kodi:
clc;
clear;
t=linspace(0,0.02, 10000);
fc=5000;
fm=200;
fs=40000;
Am=20;
Ac=30;
m=Am/Ac;
wc=2*pi*fc*t;
wm=2*pi*fm*t;
ec=Ac*sin(wc);
em=Am*sin(wm);
y=Ac*(1+m*sin(wm).*sin(wc));
d=y.*ec;
d1=conv(d,exp(-t/0.000795));
a=10000;
subplot(4,1,1),plot(t(5:a),em(5:a))
xlabel('Time(sek)');
ylabel('Amplitud(v)');
title('MODULATING Nurmatov_Z');
subplot(4,1,2),plot(t(5:a),ec(5:a))
xlabel('Time(sek)');
ylabel('Amplitud(v)');
title('CARRIER Nurmatov_Z');
subplot(4,1,3),plot(t(5:a),y(5:a))
xlabel('Time(sek)');
ylabel('Amplitud(v)');
title('AMPLITUDE MODULATED Nurmatov_Z');
subplot(4,1,4),plot(t(5:a),d1(5:a))
xlabel('Tiempo(seg)');
ylabel('Amplitud(v)');
title('DEMODULATING Nurmatov_Z');

1. 
   Rasm. Avvalo kod yozish uchun home orqali new script bosib ,
   

kod yozadigan oynani ochvolamiz va kod yozamiz.

2-rasm. Run berilgandan so’ng , birinchi signal oddiy sinusoidal signal, ikkinchisi tashuvchi signal, uchinchisi tashuvchi signal bilan qo’shilganda hosil bo’ladigan amplituda moduliyatsiya
O’zgartirilgan dastur kod

clc;
clear;

t=linspace(0,0.02, 10000);
fc=4000;
fm=200;
fs=60000;
Am=5;
Ac=10;
m=Am/Ac;
wc=2*pi*fc*t;
wm=2*pi*fm*t;
ec=Ac*sin(wc);
em=Am*sin(wm);
y=Ac*(1+m*sin(wm).*sin(wc));
d=y.*ec;
d1=conv(d,exp(-t/0.000795));
a=10000;
subplot(4,1,1),plot(t(5:a),em(5:a))
xlabel('Time(sek)');
ylabel('Amplitud(v)');
title('MODULATING Nurmatov_Z');
subplot(4,1,2),plot(t(5:a),ec(5:a))
xlabel('Time(sek)');
ylabel('Amplitud(v)');
title('CARRIER Nurmatov_Z');
subplot(4,1,3),plot(t(5:a),y(5:a))
xlabel('Time(sek)');
ylabel('Amplitud(v)');
title('AMPLITUDE MODULATED Nurmatov_Z');
subplot(4,1,4),plot(t(5:a),d1(5:a))
xlabel('Tiempo(seg)');
ylabel('Amplitud(v)');
title('DEMODULATING Nurmatov_Z');

3-rasm. Run berilgandan so’ng , birinchi signal oddiy sinusoidal signal, ikkinchisi tashuvchi signal, uchinchisi tashuvchi signal bilan qo’shilganda hosil bo’ladigan amplituda moduliyatsiya o’zgartirilgan holati.