一、获取代码方式
获取代码方式1：
完整代码已上传我的资源：【滤波器】基于matlab GUI高通+低通+带通+带阻FIR滤波器设计【含Matlab源码 092期】
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二、数字滤波器设计简介(附课题作业报告)
1 设计原理
1.1 滤波器概念
1.2 数字滤波器的系统函数和差分方程
1.3 数字滤波器结构的表示
1.4 数字滤波器的分类
2.1 IIR滤波器与FIR滤波器的分析比较
2.2 FIR滤波器的原理
3 FIR滤波器的仿真步骤
三、部分源代码
function varargout = yemian(varargin)% yemian M-file for yemian.fig%yemian, by itself, creates a new yemian or raises the existing%singleton*.%%H = yemian returns the handle to a new yemian or the handle to%the existing singleton*.%%yemian('CALLBACK',hObject,eventData,handles,...) calls the local%function named CALLBACK in yemian.M with the given input arguments.%%yemian('Property','Value',...) creates a new yemian or raises the%existing singleton*. Starting from the left, property value pairs are%applied to the GUI before yemian_OpeningFunction gets called. An%unrecognized property name or invalid value makes property application%stop. All inputs are passed to yemian_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 yemian% Last Modified by GUIDE v2.5 17-Jun- 23:53:25% Begin initialization code - DO NOT EDITgui_Singleton = 1;gui_State = struct('gui_Name', mfilename, ...'gui_Singleton', gui_Singleton, ...'gui_OpeningFcn', @yemian_OpeningFcn, ...'gui_OutputFcn', @yemian_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 yemian is made visible.function yemian_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 yemian (see VARARGIN)% Choose default command line output for yemianhandles.output = hObject;% Update handles structureguidata(hObject, handles);% UIWAIT makes yemian wait for user response (see UIRESUME)% uiwait(handles.figure1);% --- Outputs from this function are returned to the command line.function varargout = yemian_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 button press in GUIRUN.function GUIRUN_Callback(hObject, eventdata, handles)luogwei(handles)% hObject handle to GUIRUN (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles structure with handles and user data (see GUIDATA)% --- Executes during object creation, after setting all properties.function axes1_CreateFcn(hObject, eventdata, handles)axes(hObject);RGB=imread('33.jpg');image(RGB);set(hObject,'xTick',[]);%x§set(hObject,'ytick',[]);%set(hObject,'box','off');%text(600,700,'welcom','fontsize',8,'color','b');%text(600,900,'0801130534','fontsize',8,'color','r');% hObject handle to axes1 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFcns called% Hint: place code in OpeningFcn to populate axes1% --- Executes during object creation, after setting all properties.% hObject handle to axes2 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFcns called% Hint: place code in OpeningFcn to populate axes2% --- Executes during object creation, after setting all properties.function axes3_CreateFcn(hObject, eventdata, handles)axes(hObject);RGB=imread('2.jpg');image(RGB);set(hObject,'xTick',[]);set(hObject,'ytick',[]);%set(hObject,'box','off');% hObject handle to axes3 (see GCBO)% eventdata reserved - to be defined in a future version of MATLAB% handles empty - handles not created until after all CreateFcns called% Hint: place code in OpeningFcn to populate axes3% --- Executes just before nizhiqing is made visible.function nizhiqing_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 unrecognized PropertyName/PropertyValue pairs from the% command line (see VARARGIN)% Choose default command line output for nizhiqinghandles.output = hObject;% Update handles structureguidata(hObject, handles);function AutoChoose(handles)Nn=128;DigitalFilter_value=get(handles.DigitalFilter,'Value');FilterDesign_value=get(handles.FilterDesign,'Value');Windows_value=get(handles.Windows,'Value');FilterType_value=get(handles.FilterType,'Value');DisplayType_value=get(handles.DisplayType,'Value');Order_value=get(handles.Order,'Value');Rp_value=str2double(get(handles.Rp,'String'));Rs_value=str2double(get(handles.Rs,'String'));Fs_value=str2double(get(handles.Fs,'String'));Fp1_value=str2double(get(handles.Fp1,'String'));Fp2_value=str2double(get(handles.Fp2,'String'));Fst1_value=str2double(get(handles.Fst1,'String'));Fst2_value=str2double(get(handles.Fst2,'String'));wp1=2*Fp1_value/Fs_value;wp2=2*Fp2_value/Fs_value;ws1=2*Fst1_value/Fs_value;ws2=2*Fst2_value/Fs_value;wp=[wp1,wp2];ws=[ws1,ws2];%IIRif(DigitalFilter_value==1)%IIR lowpass or highpassor bandpass or stoppass%butter wordif(FilterDesign_value==1)%lowpass or highpassif((FilterType_value==1)||(FilterType_value==2))[n,Wn]=buttord(wp1,ws1,Rp_value,Rs_value)%set(handles.MinOrderDisplay,'string',num2str(n))else%bandpass or stoppassif((FilterType_value==3)||(FilterType_value==4)) [n,Wn]=buttord(wp,ws,Rp_value,Rs_value)set(handles.MinOrderDisplay,'string',num2str(n))endendelse%cheby1if(FilterDesign_value==2)%lowpass or highpassif((FilterType_value==1)||(FilterType_value==2))[n,Wn]=cheb1ord(wp1,ws1,Rp_value,Rs_value);set(handles.MinOrderDisplay,'string',num2str(n));else%bandpass or stoppassif((FilterType_value==3)||(FilterType_value==4)) [n,Wn]=cheb1ord(wp,ws,Rp_value,Rs_value)set(handles.MinOrderDisplay,'string',num2str(n))endendelse%cheby2if(FilterDesign_value==3)%lowpass or highpassif((FilterType_value==1)||(FilterType_value==2))[n,Wn]=cheb2ord(wp1,ws1,Rp_value,Rs_value);set(handles.MinOrderDisplay,'string',num2str(n));else%bandpass or stoppass if((FilterType_value==3)||(FilterType_value==4)) [n,Wn]=cheb2ord(wp,ws,Rp_value,Rs_value);set(handles.MinOrderDisplay,'string',num2str(n));endend
四、运行结果
五、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，.
