Лабораторная работа №2.


N=200;

Rp=abs(1/(20*log10(0.01)));

Rs=35;

Wp=0.05;

Ws=0.1;

[n,Wn]=cheb1ord(Wp,Ws,Rp,Rs);

[b,a]=cheby1(n,Rp,Wn,'high');

[k,na]=size(a);

[k,nb]=size(b);

 

x=zeros(1,N);

y=zeros(1,N);

for i=1:N

   x(i)=sin(i*pi*0.02)+sin(i*pi*0.3);

end

y=filter(b,a,x);

 

x1=zeros(1,N);

y1=zeros(1,N);

for i=N/2:N

   x1(i)=1;

end

y1=filter(b,a,x1);

 

x2=zeros(1,N);

y2=zeros(1,N);

x2(N/2)=1;

y2=filter(b,a,x2);

 

[H,w]=freqz(b,a,N,2);

subplot(4,1,1),plot(x),grid

title('Входной сигнал')

subplot(4,1,3),plot(y),grid

title('Filtered Signal')

subplot(4,1,2),plot(w,abs(H)),grid

title('Filter AFC')

pause

subplot(4,1,1),plot(x1),grid

title('juytjuytujyt')

subplot(4,1,2),plot(y1),grid

title('Filtered')

subplot(4,1,3),plot(x2),grid

title('dfhdfhsdfgh')

subplot(4,1,4),plot(y2),grid

title('Filtered')


>> a

a =

1.0000 -5.3677 12.0369 -14.4318 9.7560 -3.5255 0.5320

 

>> b

b =

0.7268 -4.3609 10.9021 -14.5362 10.9021 -4.3609 0.7268

 

>> n

n =

6