Muhammad al-Xorazmiy nomidagi tatu ning cal403-L1 guruh talabasi

Muhammad al-Xorazmiy nomidagi

TATU ning CAL403-L1 guruh talabasi
Rahmatullayev Muhammadjonning
Algoritmlarni loyihalash fanidan
Yozgan 3-Labaratoriya ish
O’qituvchi: Dotsent Sabirov Karimjon Kabildjanovich




3- Find a leading harmonics of digital signals based on Fourier series;

clc;
clear all;

close all;
N=20;
a(1)=4775/11264;
c(1)=abs(a(1));
for n=1:N
a(n+1)=-5/2*sin(41.25*pi*n/22);
b(n+1)=5/2*(1-cos(41.25*pi*n/22));
for i=1:7
a(n+1)=a(n+1)+5/2^(9-i)*(sin(5/2*(2*i+1)*pi*n/22)-sin(5/2*(2*i-1)*pi*n/22));
b(n+1)=b(n+1)+5/2^(9-i)*(cos(5/2*(2*i+1)*pi*n/22)-cos(5/2*(2*i-1)*pi*n/22));
end
a(n+1)=1/(pi*n)*a(n+1);
b(n+1)=-1/(pi*n)*b(n+1);
c(n+1)=sqrt(a(n+1)^2+b(n+1)^2);
end
disp(c);


4- Construct mathematical models for a linear model using the least square method;

clc;
clear all;

close all;
t=[0 5.5 11 16.5 22 27.5 33 38.5 44]
f=[0 5/256 5/128 5/64 5/32 5/16 5/8 5/4 5/2]
A=[sum(t) length(t);
sum(t.*t) sum(t)]
A1=[sum(f) length(t);
sum(t.*f) sum(t)]
A2=[sum(t) sum(f);
sum(t.*t) sum(t.*f)]
a=det(A1)/det(A)
b=det(A2)/det(A)



Y = ax + b = 0.04575x -0.4531;
5) Construct mathematical models for a quadratic model using the least square method;




6)