fm調(diào)制與解調(diào)系統(tǒng)課程設(shè)計(jì)報(bào)告(文件)
【正文】 subplot(3,2,2)plot(f(1:N/2),abs(VX(1:N/2)))。Hz39。)grid onsubplot(3,2,4)plot(f(1:N/2),abs(VC(1:N/2)))。Hz39。)grid onsubplot(3,2,6)plot(f(1:N/2),abs(VF(1:N/2)))。Hz39。%采樣點(diǎn)數(shù)n=0:N1。%調(diào)制信號int_vx =sin(20*pi*t)/(20*pi)。%對調(diào)頻FM信號延時(shí)后，再加上pi/10的固定相移vif=vc.*vf1。f=n*fs/N。)grid onVX=fft(vx,N)。)xlabel(39。時(shí)域解調(diào)FM信號39。)xlabel(39。%采樣頻率N=256。%調(diào)相比例常數(shù)f=n*fs/N。VC=fft(vc,N)。title(39。頻域調(diào)制信號39。title(39。頻域載波信號39。title(39。頻域調(diào)相信號39。%采樣間隔fs=1/T。kp=pi/20。%給調(diào)相信號加上pi/2的固定相移vip=vc.*vp1。f=n*fs/N。)grid onVX=fft(vx,N)。)xlabel(39。時(shí)域解調(diào)PM信號39。)xlabel(39。%采樣頻率N=256。%調(diào)制信號int_vx(1)=0。%調(diào)頻比例常數(shù)vf=cos(2*pi*100*t+kf*int_vx)。f=n*fs/N。)axis([0,300,])grid onsubplot(3,2,2)plot(f(1:N/2),abs(VX(1:N/2)))。Hz39。)grid onsubplot(3,2,4)plot(f(1:N/2),abs(VC(1:N/2)))。Hz39。)grid onsubplot(3,2,6)plot(f(1:N/2),abs(VF(1:N/2)))。Hz39。%采樣點(diǎn)數(shù)n=0:N1。f=n*fs/N。%載波信號vp1=cos(2*pi*100*t+kp*vxpi/2)。%對調(diào)頻FM信號延時(shí)后，再加上pi/10的固定相移vif=vc.*vf1。subplot(2,2,1)plot(vx)。subplot(2,2,2)plot(f(1:N/2),abs(VX(1:N/2)))。Hz39。)grid onsubplot(2,2,4)plot(f(1:N/2),abs(VOF(1:N/2)))。%采樣間隔fs=1/T。f=n*fs/N。%載波信號vp=cos(2*pi*100*t+kp*vx)。subplot(3,2,1)plot(vx)。title(39。)grid onsubplot(3,2,3)plot(vc)。title(39。)grid onsubplot(3,2,5)plot(vp)。title(39。)grid on% Executes on button press in pushbutton8.function pushbutton8_Callback(hObject, eventdata, handles)% hObject handle to pushbutton8 (see GCBO)% eventdata reserved to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)T=。t=n*T。%載波信號vp1=cos(2*pi*100*t+kp*vxpi/2)。VOP=fft(vop,N)。時(shí)域調(diào)制信號39。頻域調(diào)制信號39。title(39。頻域調(diào)制PM信號39。)grid onsubplot(2,2,4)plot(f(1:N/2),abs(VOP(1:N/2)))。Hz39。subplot(2,2,2)plot(f(1:N/2),abs(VX(1:N/2)))。subplot(2,2,1)plot(vx)。%通過相乘器b=fir1(80,)。%調(diào)相比例常數(shù)vx=square(2*pi*10*t,50)。%采樣頻率N=256。)xlabel(39。時(shí)域調(diào)相信號39。)xlabel(39。時(shí)域載波信號39。)xlabel(39。時(shí)域調(diào)制信號39。VC=fft(vc,N)。%調(diào)相比例常數(shù)vx=square(2*pi*10*t,50)。%采樣點(diǎn)數(shù)n=0:N1。頻域調(diào)制FM信號39。title(39。頻域調(diào)制信號39。時(shí)域調(diào)制信號39。vof=filter(b,1,vip)。vf=cos(2*pi*100*()+2*pi*kf*25*sawtooth(2*pi*()*10,))。%調(diào)制信號int_vx=25*sawtooth(2*pi*t*10,)。kf=pi/2。%采樣間隔fs=1/T。頻域調(diào)頻信號39。title(39。頻域載波信號39。title(39。頻域調(diào)制信號39。title(39。VC=fft(vc,N)。endvc=cos(2*pi*100*t)。t=n*T。)grid on% Executes on button press in pushbutton5.function pushbutton5_Callback(hObject, eventdata, handles)% hObject handle to pushbutton5 (see GCBO)% eventdata reserved to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)T=。title(39。)grid onsubplot(2,2,3)plot(vop)。title(39。title(39。vop=filter(b,1,vip)。%調(diào)制信號vc=cos(2*pi*100*t)。%采樣點(diǎn)數(shù)n=0:N1。Hz39。)grid onsubplot(3,2,6)plot(f(1:N/2),abs(VP(1:N/2)))。Hz39。)grid onsubplot(3,2,4)plot(f(1:N/2),abs(VC(1:N/2)))。Hz39。)grid onsubplot(3,2,2)plot(f(1:N/2),abs(VX(1:N/2)))。%調(diào)相信號VP=fft(vp,N)。%調(diào)制信號vc=cos(2*pi*100*t)。t=n*T。)grid on% Executes on button press in pushbutton3.function pushbutton3_Callback(hObject, eventdata, handles)% hObject handle to pushbutton3 (see GCBO)% eventdata reserved to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)T=。title(39。)grid onsubplot(2,2,3)plot(vof)。title(39。title(39。vof=filter(b,1,vif)。%載波信號vf=cos(2*pi*100*()+2*pi*kf*(sin(20*pi*())/(20*pi)))。kf=pi/2。%采樣間隔fs=1/T。頻域調(diào)頻信號39。title(39。頻域載波信號39。title(39。頻域調(diào)制信號39。title(39。%調(diào)頻信號VX=fft(vx,N)。%調(diào)制信號int_vx(1)=0。t=n*T。% Executes on button press in pushbutton1.function pushbutton1_Callback(hObject, eventdata, handles)% hObject handle to pushbutton1 (see GCBO)% eventdata reserved to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)T=。% Update handles structureguidata(hObject, handles)。 ischar(varargin{1}) = str2func(varargin{1})。gui_Callback39。gui_OutputF39。gui_Singleton39。s Tools menu. Choose GUI allows only one% instance to run (singleton).%% See also: GUIDE, GUIDATA, GUIHANDLES% Edit the above text to modify the response to help jiaodu_tiaozhiANDjietiao% Last Modified by GUIDE 26Dec2011 15:32:02% Begin initialization code DO NOT EDITgui
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