【数字信号处理】基于matlab GUI IIR低通+FIR高通信号时域+频谱分析【含Matlab源码 1029期】

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⛄一、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

⛄二、部分源代码

function varargout = program1(varargin)
% PROGRAM1 MATLAB code for program1.fig
% PROGRAM1, by itself, creates a new PROGRAM1 or raises the existing
% singleton*.
%
% H = PROGRAM1 returns the handle to a new PROGRAM1 or the handle to
% the existing singleton*.
%
% PROGRAM1(‘CALLBACK’,hObject,eventData,handles,…) calls the local
% function named CALLBACK in PROGRAM1.M with the given input arguments.
%
% PROGRAM1(‘Property’,‘Value’,…) creates a new PROGRAM1 or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before program1_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to program1_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 program1

% Last Modified by GUIDE v2.5 03-Jan-2020 09:14:21

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct(‘gui_Name’, mfilename, …
‘gui_Singleton’, gui_Singleton, …
‘gui_OpeningFcn’, @program1_OpeningFcn, …
‘gui_OutputFcn’, @program1_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 program1 is made visible.
function program1_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 program1 (see VARARGIN)

% Choose default command line output for program1
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes program1 wait for user response (see UIRESUME)
% uiwait(handles.figure1);

set(handles.uipanel1,‘visible’,‘off’);
set(handles.uipanel2,‘visible’,‘off’);
% — Outputs from this function are returned to the command line.
function varargout = program1_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 on selection change in popupmenu1.
function popupmenu1_Callback(hObject, eventdata, handles)
% hObject handle to popupmenu1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

% Hints: contents = cellstr(get(hObject,‘String’)) returns popupmenu1 contents as cell array
% contents{get(hObject,‘Value’)} returns selected item from popupmenu1

% — Executes during object creation, after setting all properties.
function popupmenu1_CreateFcn(hObject, eventdata, handles)
% hObject handle to popupmenu1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called

% Hint: popupmenu 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)
cla(handles.axes1,‘reset’);
cla(handles.axes2,‘reset’);
cla(handles.axes3,‘reset’);
axes(handles.axes1);
cla;

L=str2num(get(handles.edit1,‘String’));
A=str2num(get(handles.edit2,‘String’));
f1=str2num(get(handles.edit3,‘String’));
f2=str2num(get(handles.edit4,‘String’));
Phi=str2num(get(handles.edit5,‘String’));
a=str2num(get(handles.edit6,‘String’));
Sig=str2num(get(handles.edit7,‘String’));
fs=1000;
phi=Phipi/180;
popup_sel_index = get(handles.popupmenu1, ‘Value’);
switch popup_sel_index
case 1
t=0:0.001:L;
y=Asin(2pif1t+phi);
plot(t,y);
set(gca,‘Xlim’,[0 1]);
title(‘原始信号’);
case 2
t=0:0.001:L;
y=Asquare(2pif1t,a);
plot(t,y);
set(gca,‘Xlim’,[0 1]);
title(‘原始信号’);
case 3
t=0:0.001:L;
y=Asin(2pif1t)+Asin(2pif2t);
plot(t,y);
set(gca,‘Xlim’,[0 1]);
title(‘原始信号’);
case 4
n=round(1000L);
t=linspace(0,L,n);
y=sqrt(Sig)randn(1,n);
plot(t,y);
set(gca,‘Xlim’,[0 1]);
title(‘原始信号’);
case 5
n=round(1000L);
t=linspace(0,L,n);
y=sqrt(Sig)*rand(1,n);
plot(t,y);
set(gca,‘Xlim’,[0 1]);
title(‘原始信号’);
end

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

⛄三、运行结果

⛄四、matlab版本及参考文献

1 matlab版本
2014a

2 参考文献
[1]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)
[2]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)

3 备注
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