【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】

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});
endif nargout[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
elsegui_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=Phi*pi/180;
popup_sel_index = get(handles.popupmenu1, 'Value');
switch popup_sel_indexcase 1t=0:0.001:L;y=A*sin(2*pi*f1*t+phi);plot(t,y);set(gca,'Xlim',[0 1]);title('原始信号');case 2t=0:0.001:L;y=A*square(2*pi*f1*t,a);plot(t,y);set(gca,'Xlim',[0 1]);title('原始信号');case 3t=0:0.001:L;y=A*sin(2*pi*f1*t)+A*sin(2*pi*f2*t);plot(t,y);set(gca,'Xlim',[0 1]);title('原始信号');case 4n=round(1000*L);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 5n=round(1000*L);t=linspace(0,L,n);y=sqrt(Sig)*rand(1,n);plot(t,y);set(gca,'Xlim',[0 1]);title('原始信号');
endfunction 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');
endfunction 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');
endfunction 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] 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)

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