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- 09:14:21% Begin initialization code - DO NOT EDITgui_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 program1handles.output = hObject;% Update handles structureguidata(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 structurevarargout{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
a
2 参考文献
[1] 沈再阳.精通MATLAB信号处理[M].清华大学出版社，.
[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，.
[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，.
[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. ,(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. ,(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. ,38(03)
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