thanks for help
i made code with some friends but i have problem
i want delta fn repeated with all R not only 0,R
that the code
A=2;
Tb=1;
R=1/Tb;
L=2*R;
f=-3*L:L/50:3*L;
P=(A.^2*Tb)/16*(sinc(f*Tb/2)).^2;
g=plot(f,P);
hold on;
xlabel('Frequency');
ylabel('Normalized Power');
stem([0 R],[(A.^2*Tb)/16 P(26)+0.1]);
hold off;
set(gca,'XTickMode','manual','XTick',[-5*R,-4*R,-3*R,-2*R,-R,0,R,2*R,3*R,4*R,5*R]);
grid on;
set(gca,'YTickMode','manual','YTick',[0.5*Tb,Tb]);
set(gca,'XTickLabel',{['-5R'];['-4R'];['-3R'];['-2R'];['-R'];['0'];['R'];['2R'];['3R'];['4R'];['5R']})
set(gca,'YTickLabel',{['0.5*Tb'];['Tb']})