一、简介
基于matlab GUI AM+DSB+SSB+ASK+FSK+PSK调制解调
二、源代码
function varargout = communication(varargin)
% COMMUNICATION MATLAB code for communication.fig
% COMMUNICATION, by itself, creates a new COMMUNICATION or raises the existing
% singleton*.
%
% H = COMMUNICATION returns the handle to a new COMMUNICATION or the handle to
% the existing singleton*.
%
% COMMUNICATION('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in COMMUNICATION.M with the given input arguments.
%
% COMMUNICATION('Property','Value',...) creates a new COMMUNICATION or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before communication_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to communication_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 communication
% Last Modified by GUIDE v2.5 02-Sep-2019 08:36:43
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @communication_OpeningFcn, ...
'gui_OutputFcn', @communication_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 communication is made visible.
function communication_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 communication (see VARARGIN)
% Choose default command line output for communication
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes communication wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = communication_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 menu_1_Callback(hObject, eventdata, handles)
% hObject handle to menu_1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% --------------------------------------------------------------------
function Untitled_2_Callback(hObject, eventdata, handles)
% hObject handle to Untitled_2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
%=========程序代码 ========
clc ;clear all;
hold on;
Fs=960; %采样频率
N=960; %采样点
n=0:N-1;t=n/Fs; %时间序列
A0=10; %载波信号振幅
A1=1; %调制信号振幅
fc=120; %载波信号频率
fm=30; %调制信号频率
f=n*Fs/N; %频率
w0=2*fc*pi;
w1=2*fm*pi;
Uc=A0*cos(w0*t); %载波信号
C1=fft(Uc); %对载波信号进行傅里叶变换
cxf=abs(C1); %进行傅里叶变换
% figure(1);
hold on;
subplot(6,2,2); plot(f(1:N/2),cxf(1:N/2));title('载波信号频谱');
% subplot(6,2,2)
% f = fftshift(C1);
% w = linspace(-Fs/2, Fs/2, N);%频率坐标，单位Hz
% plot(w,abs(f));
% title('信号的频谱');
% xlabel('频率(Hz)');
subplot(6,2,3); plot(t,mes); title('调制信号');axis([0 0.5 0 2]);
subplot(6,2,4); plot(f(1:N/2),zxc(1:N/2)); title('调制信号频谱'); axis([0 50 0 500])
Uam=modulate(mes,fc,Fs,'am');%AM 已调信号
C3=fft(Uam); % 对AM已调信号进行傅里叶变换
asd=abs(C3);
% figure(3)
subplot(6,2,6);plot(f(1:N/2),asd(1:N/2)),grid; title('AM已调信号频谱');
% figure(4)
axis([0 0.5 0 2]);
subplot(6,2,8); plot(f(1:N/2),wqe(1:N/2)),grid; title('AM解调信号频谱');
k=awgn(Uam,10); %加大噪声，信噪比为10
pp=fft(k,960);
zs=abs(pp);
% figure(6)
subplot(6,2,9);plot(t,k);axis([0 0.5 -2 2])
title('加噪声后得到AM信号时域波形');%加大噪声后得到AM信号时域波形
subplot(6,2,10);plot(f(1:N/2),zs(1:N/2));
title('加噪声后得到AM信号频域波形'); %加大噪声后得到AM信号频域波形
grid on;
qaz=demod(k,fc,Fs,'am'); %加大噪声后解调
subplot(6,2,11); ;title('加大噪声后解调得到信号时域波形'); %加大噪声后解调得到信号时域波形
edc=abs(wsx);
subplot(6,2,12);
plot(f(1:N/2),edc(1:N/2));
hold off;
title('加大噪声后解调得到信号频域波形'); %加大噪声后解调得到信号频域波形
grid on;
function [ t, st ] = F2T( f, sf )
df = f(2)-f(1);
Fmx = f(end)-f(1)+df;
dt = 1/Fmx;
N = length(sf);
sff = fftshift(sf);
st = Fmx * ifft(sff);
end
% --- Executes just before communication is made visible.
function communication_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 communication (see VARARGIN)
% Choose default command line output for communication
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes communication wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = communication_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 menu_1_Callback(hObject, eventdata, handles)
% hObject handle to menu_1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% --------------------------------------------------------------------
function Untitled_2_Callback(hObject, eventdata, handles)
% hObject handle to Untitled_2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
三、运行结果
四、备注
版本：2014a
