【数字信号处理】基于matlab GUI数字信号处理系统【含Matlab源码 1088期】

一、获取代码方式

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二、数字信号处理系统简介

理论知识参考文献：基于GUI的《数字信号处理》教学演示系统的设计
基于Matlab GUI界面的数字信号处理辅助教学系统
基于MATLAB的数字信号处理实验平台

三、部分源代码

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

% Last Modified by GUIDE v2.5 08-Jul-2020 22:07:09

% Begin initialization code - DO NOT EDIT
global y;
global z;
global mix;
global t;
global amp;
global fre;
global nak;
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @main_OpeningFcn, ...
                   'gui_OutputFcn',  @main_OutputFcn, ...
                   'gui_LayoutFcn',  [] , ...
                   'gui_Callback',   []);
if nargin & isstr(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 main is made visible.
function main_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 main (see VARARGIN)

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

% Update handles structure
guidata(hObject, handles);

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


% --- Outputs from this function are returned to the command line.
function varargout = main_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;


% --- Executes during object creation, after setting all properties.
function amp_edit_CreateFcn(hObject, eventdata, handles)
% hObject    handle to amp_edit (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
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end



function amp_edit_Callback(hObject, eventdata, handles)
global amp;
amp=str2num(get(handles.amp_edit,'String'));
% hObject    handle to amp_edit (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 amp_edit as text
%        str2double(get(hObject,'String')) returns contents of amp_edit as a double


% --- Executes during object creation, after setting all properties.
function fre_edit_CreateFcn(hObject, eventdata, handles)

% hObject    handle to fre_edit (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
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end



function fre_edit_Callback(hObject, eventdata, handles)
global fre;
fre=str2num(get(handles.fre_edit,'String'));
% hObject    handle to fre_edit (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 fre_edit as text
%        str2double(get(hObject,'String')) returns contents of fre_edit as a double


% --- Executes on button press in sin_button.
function sin_button_Callback(hObject, eventdata, handles)
global y;
global t;
global amp;
global fre;
global nak;
amp=str2num(get(handles.amp_edit,'String'));
fre=str2num(get(handles.fre_edit,'String'));
nak=50*fre;
t=0:1/nak:15;
y=zeros(length(t),length(amp),length(fre));
cla;
for k=1:length(amp)
    for j=1:length(fre)
        for i=1:length(t)
         y(i,k,j)=amp(k)*sin(2*pi*fre(j).*t(i));
        end
   findobj('tag','sig_axes');
   plot(t, y(:,k,j),'parent',handles.sig_axes); 
   end
end


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


% --- Executes on button press in tri_button.
function tri_button_Callback(hObject, eventdata, handles)
global y;
global t;
global amp;
global fre;
global nak;
amp=str2num(get(handles.amp_edit,'String'));
fre=str2num(get(handles.fre_edit,'String'));
nak=50*fre;
t=0:1/nak:15;
y=zeros(length(t),length(amp),length(fre));
cla;

for k=1:length(amp)
    for j=1:length(fre)
        pe=1/fre(j);
        NUM=15*fre(j);
        for i=1:length(t)
            for l=1:NUM
            %for l=0:(15*fre(j)-1)
              %  if (t(i)>=l/fre(j) && t(i)<=(l/fre(j)+1/(2*fre(j))))
              if (t(i)>=(l-1)*pe && t(i)<=(l-1)*pe+pe/2)
                  y(i,k,j)=2*amp(k)/pe*t(i)-2*amp(k)*(l-1);
                    %y(i)=amp(k)*2*fre(j)*t(i)-2*l*amp(k);
              else if (t(i)<=l*pe && t(i)>=(l-1)*pe+pe/2)
                  y(i,k,j)=-2*amp(k)/pe*t(i)+2*amp(k)*l;
                    %y(i)=-amp(k)*2*fre(j)*t(i)+2*l*amp(k);
                    % end
              end
          end
          end
        end
           % y(:,k,j)=amp(k)*sin(2*pi*fre(j).*t);
    findobj('tag','sig_axes');
    plot(t, 2*y(:,k,j)-amp,'parent',handles.sig_axes); 
    end
end

    
    

  

 

  
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四、运行结果

五、matlab版本及参考文献

1 matlab版本
2014a

2 参考文献
[1] 沈再阳.精通MATLAB信号处理[M].清华大学出版社，2015.
[2]高宝建,彭进业,王琳,潘建寿.信号与系统——使用MATLAB分析与实现[M].清华大学出版社，2020.
[3]王文光,魏少明,任欣.信号处理与系统分析的MATLAB实现[M].电子工业出版社，2018.
[4]高彦彦,张晶,李莉,贾英茜.基于GUI的《数字信号处理》教学演示系统的设计[J].教育教学论坛. 2019,(48)
[5]李俊,张淑玲,帅晶.基于Matlab GUI界面的数字信号处理辅助教学系统[J].信息通信. 2020,(08)
[6]朱御康.基于MATLAB的数字信号处理实验平台[J].通信电源技术. 2021,38(03)

文章来源: qq912100926.blog.csdn.net，作者：海神之光，版权归原作者所有，如需转载，请联系作者。

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