, (1.8)
(1.1), ():
( Sinc (x) sin (x)/x. MATLAB - sinc(x) = sin(pi*x)/(pi*x) , sinc1(x)).
S max =2.18e-4 / ( 1.8). () F 0 = 4375 ( 1.8 ). () .
1.8 -
MATLAB ( -), . , .
Uo = 1; Um = 2; T = 1e-3;
tau = T/3; W = 2*pi/T;
f = linspace(0,15e3,300); w = 2*pi*f;
I1 = -Uo*tau*sinc(w*tau/(2*pi));
I2 =1/2*Um*tau*(sinc((W-w)*tau/(2*pi))+sinc((W+w)*tau/(2*pi)));
Sw = I1+I2;
plot(f,abs(Sw)),grid
(1.8) .
N = 10000;
t = linspace(-tau/2,tau/2,N+1);
i = 1;
for f1=0:50:15000
St(i)=sum(cosinob1(t,Um,T,Uo).*exp(-j*2*pi*f1*t)');
i=i+1;
end
St=St*tau/N;
figure(2)
plot(0:50:15000,abs(St))
10000 ( 1-9).