【滤波器】基于Matlab设计巴斯切比雪夫椭圆低通高通带通带阻数字滤波器附GUI界面-阿里云开发者社区

【滤波器】基于Matlab设计巴斯切比雪夫椭圆低通高通带通带阻数字滤波器附GUI界面

2022-12-05 237

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简介： 【滤波器】基于Matlab设计巴斯切比雪夫椭圆低通高通带通带阻数字滤波器附GUI界面

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🍎个人主页：Matlab科研工作室

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⛄ 内容介绍

介绍了基于Matlab的IIR数字滤波器设计方法.先确定数字滤波器的性能指标,再按照一定的映射规则(冲激响应不变法或双线性变换法)变换成模拟滤波器的性能指标,然后采用一定的逼近方法(巴特沃斯型或切比雪夫型)设计模拟滤波器,最后将模拟滤波器按照同样的映射规则转变成数字滤波器.同时介绍了设计IIR数字滤波器常用的Matlab函数.通过Matlab实验仿真,利用介绍的数字滤波器的设计方法,成功地设计出了满足预定指标的各型IIR数字滤波器.

⛄ 部分代码

function varargout = Butterworth_bandpass(varargin)

% Begin initialization code - DO NOT EDIT

gui_Singleton = 1;

gui_State = struct('gui_Name', mfilename, ...

'gui_Singleton', gui_Singleton, ...

'gui_OpeningFcn', @Butterworth_bandpass_OpeningFcn, ...

'gui_OutputFcn', @Butterworth_bandpass_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 Butterworth_bandpass is made visible.

function Butterworth_bandpass_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 Butterworth_bandpass (see VARARGIN)

% Choose default command line output for Butterworth_bandpass

handles.output = hObject;

% Update handles structure

guidata(hObject, handles);

% UIWAIT makes Butterworth_bandpass wait for user response (see UIRESUME)

% uiwait(handles.figure1);

% --- Outputs from this function are returned to the command line.

function varargout = Butterworth_bandpass_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 muestreo_CreateFcn(hObject, eventdata, handles)

% hObject handle to muestreo (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

% --- Executes on button press in menu.

function menu_Callback(hObject, eventdata, handles)

% hObject handle to menu (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

FILTER

close Butterworth_bandpass

% --- Executes on button press in calcular.

function calcular_Callback(hObject, eventdata, handles)

% hObject handle to calcular (see GCBO)

% eventdata reserved - to be defined in a future version of MATLAB

% handles structure with handles and user data (see GUIDATA)

Fs=str2double(get(handles.muestreo,'String'));

Fpb=str2double(get(handles.b_pb,'String'));

Fpb1=str2double(get(handles.dos0,'String'));

Fsb=str2double(get(handles.b_rb,'String'));

Fsb1=str2double(get(handles.dos1,'String'));

Rpb=str2double(get(handles.edit4,'String'));

Rsb=str2double(get(handles.edit5,'String'));

if (Fs<0 | isnan(Fs))