电信论文参考资料Word文件下载.docx
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end
functionpushbutton1_Callback(hObject,eventdata,handles)
ft=get(findobj('
tag'
'
ft'
),'
string'
ft=sym(ft);
axes(handles.axes1)
cla
ezplot(ft)
gridon
answer=char(fourier(ft));
set(handles.fw,'
answer);
fw=sym(get(handles.fw,'
))
axes(handles.axes2)
ezplot(fw)
fw=get(findobj('
fw'
fw=sym(fw);
answer=char(ifourier(fw));
set(handles.ft,'
ft=sym(get(handles.ft,'
functionx=Heaviside(t)
x=(t>
0)
answer=char(laplace(ft));
set(handles.fs,'
fs=sym(get(handles.fs,'
ezplot(fs)
fs=get(findobj('
fs'
fs=sym(fs);
answer=char(ilaplace(fs));
gridon
fn=get(findobj('
fn'
fn=sym(fn);
symsnz;
answer=char(ztrans(fn,n,z));
fz=sym(answer)
fz=simple(fz)
answer=char(fz)
set(handles.fz,'
answer)
symsnz
fz=get(findobj('
fz'
fz=sym(fz);
answer=char(iztrans(fz,z,n));
set(handles.fn,'
fn=sym(get(handles.fn,'
n=0:
1:
10;
fn=2.^n.*n
stem(n,fn,'
filled'
)
n=str2double(get(handles.edit1,'
));
t=-2:
2;
F0=0.5;
Fn=F0*ones(1,length(t));
fori=1:
2:
n
Fn=Fn+cos(pi*i*t)*sinc(i/2);
plot(t,Fn,'
m-'
linewidth'
2);
axis([-22-0.21.2]);
symst
n=[-60:
-1,eps,1:
60];
A=1;
T=str2double(get(handles.tt,'
tao=str2double(get(handles.tao,'
F0=int(A,t,-tao/2,tao/2)/T
f=A*exp(-j*n*2*pi/T*t);
Fn=int(f,t,-tao/2,tao/2)/T;
Fn=simple(Fn)
Fn=subs(Fn,n,'
n'
stem(n,Fn,'
line([-6060],[00])
xlabel('
),ylabel('
Fn'
r=str2double(get(handles.r,'
l=str2double(get(handles.l,'
c=str2double(get(handles.c,'
b=[r*c0];
a=[r*l*clr];
zs=roots(b)
ps=roots(a)
plot(real(zs),imag(zs),'
o'
holdon
plot(real(ps),imag(ps),'
x'
w=0:
s=j*w;
h=polyval(b,s)./polyval(a,s);
hm=abs(h);
plot(w,hm);
w)'
ylabel('
hm'
hp=angle(h)*180/pi;
plot(w,hp);
hp'
symss
xs=poly2sym(b,s)/poly2sym(a,s)
xt=char(ilaplace(xs));
set(handles.im,'
xt);
xt=sym(get(handles.im,'
axes(handles.sss)
ezplot(xt)
b1=[r*c0];
a1=[r*l*clr0];
xs1=poly2sym(b1,s)/poly2sym(a1,s)
xt1=char(ilaplace(xs1));
xt1);
xt1=sym(get(handles.im,'
axes(handles.iii)
ezplot(xt1)
fs=s/(s^2+s+1)
ft=ilaplace(fs)
symstu
f='
Du+2*u=2*exp(-t),u(0)=0'
u=dsolve(f)
ezplot(u)
u=2*exp(-t)-2*exp(-2*t)