基于matlab模拟am，fm，dsb，ssb，pm信号调制附GUI界面

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matlab科研助手 2023-07-15 10:25:37 ©著作权

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⛄ 内容介绍

AM（Amplitude Modulation）调制是一种常见的模拟调制技术，通过改变载波信号的幅度来传输基带信号。在AM调制中，基带信号被乘以一个高频载波信号，产生一个带有两个边带的调制信号。这两个边带位于载波频率的上下方。

FM（Frequency Modulation）调制是一种模拟调制技术，通过改变载波信号的频率来传输基带信号。在FM调制中，基带信号被用于调制载波信号的频率，使得载波频率在基带信号变化时发生相应的变化。这种调制方式产生一个带宽较宽的调制信号，其中包含了无限多个边带。

DSB（Double Sideband）调制是一种模拟调制技术，它将基带信号的全部频谱复制到两个边带中，同时去除了载波信号。DSB调制产生的信号带宽较大，效率较低，因为它需要传输整个基带信号的频谱。

SSB（Single Sideband）调制是一种模拟调制技术，它只传输基带信号的一个边带，而另一个边带和载波信号被抑制或抑制得非常弱。SSB调制可以提高信号的带宽利用率，并减少功率消耗。

PM（Phase Modulation）调制是一种模拟调制技术，它通过改变载波信号的相位来传输基带信号。在PM调制中，基带信号被用于调制载波信号的相位，使得载波相位在基带信号变化时发生相应的变化。PM调制产生的调制信号带宽较宽，但相对于FM调制，它的抗干扰性更好。

这些调制方式在无线通信、广播、电视等领域中被广泛应用，每种调制方式具有不同的特点和适用场景。

⛄ 部分代码

function varargout = dsb(varargin)
% DSB MATLAB code for dsb.fig
%      DSB, by itself, creates a new DSB or raises the existing
%      singleton*.
%
%      H = DSB returns the handle to a new DSB or the handle to
%      the existing singleton*.
%
%      DSB('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in DSB.M with the given input arguments.
%
%      DSB('Property','Value',...) creates a new DSB or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before dsb_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to dsb_OpeningFcn via varargin.
%
%      *See GUI Options on GUIDE'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 dsb

% Last Modified by GUIDE v2.5 26-Feb-2020 23:48:18

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @dsb_OpeningFcn, ...
                   'gui_OutputFcn',  @dsb_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin && ischar(varargin{1})
    gui_State.gui_Callback = str2func(varargin{1});
end

if nargout
    [varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
    gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT


% --- Executes just before dsb is made visible.
function dsb_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
% varargin   command line arguments to dsb (see VARARGIN)

% Choose default command line output for dsb
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes dsb wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = dsb_OutputFcn(hObject, eventdata, handles) 
% varargout  cell array for returning output args (see VARARGOUT);
% hObject    handle to figure
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Get default command line output from handles structure
varargout{1} = handles.output;



function edit1_Callback(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit1 as text
%        str2double(get(hObject,'String')) returns contents of edit1 as a double


% --- Executes during object creation, after setting all properties.
function edit1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit2_Callback(hObject, eventdata, handles)
% hObject    handle to edit2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit2 as text
%        str2double(get(hObject,'String')) returns contents of edit2 as a double


% --- Executes during object creation, after setting all properties.
function edit2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit3_Callback(hObject, eventdata, handles)
% hObject    handle to edit3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit3 as text
%        str2double(get(hObject,'String')) returns contents of edit3 as a double


% --- Executes during object creation, after setting all properties.
function edit3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit3 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit4_Callback(hObject, eventdata, handles)
% hObject    handle to edit4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit4 as text
%        str2double(get(hObject,'String')) returns contents of edit4 as a double


% --- Executes during object creation, after setting all properties.
function edit4_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit4 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit5_Callback(hObject, eventdata, handles)
% hObject    handle to edit5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit5 as text
%        str2double(get(hObject,'String')) returns contents of edit5 as a double


% --- Executes during object creation, after setting all properties.
function edit5_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit5 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit6_Callback(hObject, eventdata, handles)
% hObject    handle to edit6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit6 as text
%        str2double(get(hObject,'String')) returns contents of edit6 as a double


% --- Executes during object creation, after setting all properties.
function edit6_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit6 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit7_Callback(hObject, eventdata, handles)
% hObject    handle to edit7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit7 as text
%        str2double(get(hObject,'String')) returns contents of edit7 as a double


% --- Executes during object creation, after setting all properties.
function edit7_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit8_Callback(hObject, eventdata, handles)
% hObject    handle to edit8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit8 as text
%        str2double(get(hObject,'String')) returns contents of edit8 as a double


% --- Executes during object creation, after setting all properties.
function edit8_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit9_Callback(hObject, eventdata, handles)
% hObject    handle to edit9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit9 as text
%        str2double(get(hObject,'String')) returns contents of edit9 as a double


% --- Executes during object creation, after setting all properties.
function edit9_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end



function edit10_Callback(hObject, eventdata, handles)
% hObject    handle to edit10 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: get(hObject,'String') returns contents of edit10 as text
%        str2double(get(hObject,'String')) returns contents of edit10 as a double


% --- Executes during object creation, after setting all properties.
function edit10_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit10 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    empty - handles not created until after all CreateFcns called

% Hint: edit controls usually have a white background on Windows.
%       See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
    set(hObject,'BackgroundColor','white');
end


% --- 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)
global stype domain ;
f0=str2double(get(handles.edit1,'string'));
fc=str2double(get(handles.edit2,'string'));
fs=str2double(get(handles.edit3,'string'));
t=[0:0.000001:0.004];
s = audioread('data.wav');
s = s(:,1);
s = s';
pos = 4.4e4;
s=s(pos:pos+length(t)-1);
if stype == 0
am1=cos(2*pi*f0*t);      %信息信号
else am1 = s;
end
t=[0:0.000001:0.004];
am=am1;      %信息信号
t1=cos(2*pi*fc*t);      %载波
s_am=am.*t1;      %DSB
%figure(1)

snr=get(handles.edit4,'String');;  %加噪
snr=str2num(snr);
y=awgn(s_am,snr);
%snr=noise;   %加噪
y=awgn(s_am,snr);
a=str2double(get(handles.edit5,'string'));
b=str2double(get(handles.edit6,'string'));
c=str2double(get(handles.edit7,'string'));
d=str2double(get(handles.edit8,'string'));
fsamp=1e6;           %带通
fucts=[a b c d];
mags=[0 1 0];
devs=[0.05 0.01 0.05];
[n,Wn,beta,ftype]=kaiserord(fucts,mags,devs,fsamp);
hh=fir1(n,Wn,ftype,kaiser(n+1,beta),'noscale');
%figure(2)
% plot(f,abs(H));title('带通滤波器幅频特性'); axis([0 50000 0 1.4]);
%figure(3)
st_p=fftfilt(hh,y);
% subplot(2,1,1);plot(t,y); title('添加噪声后信号波形'); axis([0.002 0.004 -4 4]);
% subplot(2,1,2);plot(t,st_p); title('滤波后信号波形'); axis([0.002 0.004 -4 4]);
sp=s_am.*t1;
u=str2double(get(handles.edit9,'string'));
v=str2double(get(handles.edit10,'string'));
fsamp=1e6;                %低通
fucts=[u v];
mags=[1 0];
devs=[0.01 0.05];
[n,Wn,beta,ftype]=kaiserord(fucts,mags,devs,fsamp);
hh=fir1(n,Wn,ftype,kaiser(n+1,beta),'noscale');
%figure(4)
[H,f]=freqz(hh,1,1024,fsamp);
% plot(f,abs(H));title('低通滤波器幅频特性'); axis([0 40000 0 2]);
%figure(5)
st_d=fftfilt(hh,sp);
% subplot(2,1,1);plot(t,sp); title('乘以载波以后信号波形'); axis([0.002 0.004 0 4]);
% subplot(2,1,2);plot(t,st_d); title('低通滤波以后解调出的波形'); axis([0.002 0.004 0 4]);

AM1=fft(am1);T1=fft(t1);S_AM=fft(s_am);Y=fft(y);ST_P=fft(st_p);SP=fft(sp);ST_D=fft(st_d);
f=(0:4000)*fs/4001-fs/2; 
% figure(6)
% subplot(3,1,1);plot(f,fftshift(abs(AM1)));title('基带信号频谱'); axis([-40000 40000 0 2000]);
% subplot(3,1,2);plot(f,fftshift(abs(T1)));title('载波信号频谱'); axis([-40000 40000 0 2000]);
% subplot(3,1,3);plot(f,fftshift(abs(S_AM)));title('ＡＭ信号频谱'); axis([-40000 40000 0 2000]);
% figure(7)
% subplot(2,1,1);plot(f,fftshift(abs(Y)));title('噪声信号频谱'); axis([-40000 40000 0 3000]);
% subplot(2,1,2);plot(f,fftshift(abs(ST_P)));title('带通滤波后频谱'); axis([-40000 40000 0 4000]);
% figure(8)
% subplot(2,1,1);plot(f,fftshift(abs(SP)));title('乘以载波后信号频谱'); axis([-40000 40000 0 4000]);
% subplot(2,1,2);plot(f,fftshift(abs(ST_D)));title('解调得到信号频谱'); axis([-40000 40000 0 4000]);
if domain == 0
plot(handles.axes5,t,am1); title('基带波形');xlabel('t/s');
plot(handles.axes6,t,t1);  title('载波信号');
plot(handles.axes7,t,s_am); title('DSB信号');
plot(handles.axes8,t,st_d); 
else 
    plot(handles.axes5,f,fftshift(abs(AM1)));title('基带信号频谱'); axis([-40000 40000 0 2000]);
    plot(handles.axes6,f,fftshift(abs(T1)));title('载波信号频谱'); axis([-40000 40000 0 2000]);
    plot(handles.axes7,f,fftshift(abs(S_AM)));title('DSB信号频谱'); axis([-40000 40000 0 2000]);
    if stype == 0
     plot(handles.axes8,f,fftshift(abs(ST_D)));title('解调得到信号频谱'); axis([-40000 40000 0 2000]); 
    else
    plot(handles.axes8,f,fftshift(abs(ST_D)));title('解调得到信号频谱'); axis([-40000 40000 0 3]);
    end
end

    
    
    
% --- Executes on button press in pushbutton2.
function pushbutton2_Callback(hObject, eventdata, handles)
% hObject    handle to pushbutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
global stype domain dtype;
set(handles.edit1,'String',2000);
set(handles.edit2,'String',20000);
set(handles.edit3,'String',40000);
set(handles.edit4,'String',5);
set(handles.edit5,'String',16000);
set(handles.edit6,'String',17500);
set(handles.edit7,'String',22500);
set(handles.edit8,'String',24000);
set(handles.edit9,'String',3000);
set(handles.edit10,'String',20000);
set(handles.radiobutton1,'Value',1);
set(handles.radiobutton2,'Value',0);
stype = 0;
set(handles.radiobutton7,'Value',1);
set(handles.radiobutton8,'Value',0);
domain = 0;


% --- Executes on button press in radiobutton1.
function radiobutton1_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton1
global stype;
set(handles.radiobutton1,'value',1);
set(handles.radiobutton2,'value',0);
stype=0;

% --- Executes on button press in radiobutton2.
function radiobutton2_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton2 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton2
global stype;
set(handles.radiobutton1,'value',0);
set(handles.radiobutton2,'value',1);
stype=1;

% --- Executes on button press in radiobutton7.
function radiobutton7_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton7 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton7
global domain;
set(handles.radiobutton7,'value',1);
set(handles.radiobutton8,'value',0);
domain=0;

% --- Executes on button press in radiobutton8.
function radiobutton8_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton8 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton8
global domain;
set(handles.radiobutton7,'value',0);
set(handles.radiobutton8,'value',1);
domain=1;

% --- Executes on button press in radiobutton9.
function radiobutton9_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton9 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton9
global dtype;
set(handles.radiobutton9,'value',1);
set(handles.radiobutton10,'value',0);
dtype=0;

% --- Executes on button press in radiobutton10.
function radiobutton10_Callback(hObject, eventdata, handles)
% hObject    handle to radiobutton10 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hint: get(hObject,'Value') returns toggle state of radiobutton10
global dtype;
set(handles.radiobutton9,'value',0);
set(handles.radiobutton10,'value',1);
dtype=1;

基于matlab模拟am，fm，dsb，ssb，pm信号调制附GUI界面_MATLAB