chebyshev2_real.m

自己编写的信号产生和处理软件

function varargout = chebyshev2_real(varargin)
% CHEBYSHEV2_REAL Application M-file for chebyshev2_real.fig
%    FIG = CHEBYSHEV2_REAL launch chebyshev2_real GUI.
%    CHEBYSHEV2_REAL('callback_name', ...) invoke the named callback.

% Last Modified by GUIDE v2.0 06-Sep-2005 10:56:05

if nargin == 0  % LAUNCH GUI

	fig = openfig(mfilename,'reuse');

	% Use system color scheme for figure:
	set(fig,'Color',get(0,'defaultUicontrolBackgroundColor'));

	% Generate a structure of handles to pass to callbacks, and store it. 
	handles = guihandles(fig);
	guidata(fig, handles);

	if nargout > 0
		varargout{1} = fig;
	end

elseif ischar(varargin{1}) % INVOKE NAMED SUBFUNCTION OR CALLBACK

	try
		if (nargout)
			[varargout{1:nargout}] = feval(varargin{:}); % FEVAL switchyard
		else
			feval(varargin{:}); % FEVAL switchyard
		end
	catch
		disp(lasterr);
	end

end


%| ABOUT CALLBACKS:
%| GUIDE automatically appends subfunction prototypes to this file, and 
%| sets objects' callback properties to call them through the FEVAL 
%| switchyard above. This comment describes that mechanism.
%|
%| Each callback subfunction declaration has the following form:
%| <SUBFUNCTION_NAME>(H, EVENTDATA, HANDLES, VARARGIN)
%|
%| The subfunction name is composed using the object's Tag and the 
%| callback type separated by '_', e.g. 'slider2_Callback',
%| 'figure1_CloseRequestFcn', 'axis1_ButtondownFcn'.
%|
%| H is the callback object's handle (obtained using GCBO).
%|
%| EVENTDATA is empty, but reserved for future use.
%|
%| HANDLES is a structure containing handles of components in GUI using
%| tags as fieldnames, e.g. handles.figure1, handles.slider2. This
%| structure is created at GUI startup using GUIHANDLES and stored in
%| the figure's application data using GUIDATA. A copy of the structure
%| is passed to each callback.  You can store additional information in
%| this structure at GUI startup, and you can change the structure
%| during callbacks.  Call guidata(h, handles) after changing your
%| copy to replace the stored original so that subsequent callbacks see
%| the updates. Type "help guihandles" and "help guidata" for more
%| information.
%|
%| VARARGIN contains any extra arguments you have passed to the
%| callback. Specify the extra arguments by editing the callback
%| property in the inspector. By default, GUIDE sets the property to:
%| <MFILENAME>('<SUBFUNCTION_NAME>', gcbo, [], guidata(gcbo))
%| Add any extra arguments after the last argument, before the final
%| closing parenthesis.





% --------------------------------------------------------------------
function varargout = pushbutton2_Callback(h, eventdata, handles, varargin)
close all;
index2;



% --------------------------------------------------------------------
function varargout = pushbutton3_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = plot_button_Callback(h, eventdata, handles, varargin)
global select_signal;
global t;

% Calculate data
y = fft(select_signal,512);
m = y.*conj(y)/512;
a = angle(y);
f = 1000*(0:256)/512;


% Create time plot
axes(handles.time_axes)
plot(t,select_signal)
ylabel('Time-domain')
set(handles.time_axes,'XMinorTick','on')
grid on

% Create magnitude plot
axes(handles.magnitude_axes)
plot(f,m(1:257))
ylabel('Magnitude');
set(handles.magnitude_axes,'XMinorTick','on')
grid on

% Create phase plot
axes(handles.phase_axes)
plot(f,a(1:257))
ylabel('Phase(degree)');
set(handles.phase_axes,'XMinorTick','on')
grid on



% --------------------------------------------------------------------
function varargout = time_axes_CreateFcn(h, eventdata, handles, varargin)





% --------------------------------------------------------------------
function varargout = plot_button_CreateFcn(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = pushbutton2_CreateFcn(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = plot_button2_Callback(h, eventdata, handles, varargin)
global select_signal;
global t;

Wp=str2double(get(handles.wp_input,'String'));
Ws=str2double(get(handles.ws_input,'String'));
Rp=str2double(get(handles.rp_input,'String'));
Rs=str2double(get(handles.rs_input,'String'));
sa=str2double(get(handles.sample_input,'String'));

val = get(handles.pop_menu,'Value');
switch val;
    case 1
        
[N,Wn]=cheb2ord(Wp/(sa/2),Ws/(sa/2),Rp,Rs);
[b,a]=cheby2(N,Rp,Wn,'high');
figure(1)
freqz(b,a,sa);

figure(2)
[h,tr]=impz(b,a,101);
stem(tr,h)
grid on

yfilt=filter(b,a,select_signal);
% Calculate data
yy = fft(yfilt,512);
mm = yy.*conj(yy)/512;
aa = angle(yy);
ff = 1000*(0:256)/512;
        
% Create time plot
axes(handles.filter_axes1)
plot(t,yfilt)
set(handles.time_axes,'XMinorTick','on')
grid on

% Create magnitude plot
axes(handles.filter_axes2)
plot(ff,mm(1:257))
set(handles.magnitude_axes,'XMinorTick','on')
grid on

% Create phase plot
axes(handles.filter_axes3)
plot(ff,aa(1:257))
set(handles.phase_axes,'XMinorTick','on')
grid on




    case 2
        
        
[N,Wn]=cheb2ord(Wp/(sa/2),Ws/(sa/2),Rp,Rs);
[b,a]=cheby2(N,Rp,Wn,'low');
figure(1)
freqz(b,a,sa);

figure(2)
[h,tr]=impz(b,a,101);
stem(tr,h)
grid on

yfilt=filter(b,a,select_signal);
% Calculate data
yy = fft(yfilt,512);
mm = yy.*conj(yy)/512;
aa = angle(yy);
ff = 1000*(0:256)/512;
        
% Create time plot
axes(handles.filter_axes1)
plot(t,yfilt)
set(handles.time_axes,'XMinorTick','on')
grid on

% Create magnitude plot
axes(handles.filter_axes2)
plot(ff,mm(1:257))
set(handles.magnitude_axes,'XMinorTick','on')
grid on

% Create phase plot
axes(handles.filter_axes3)
plot(ff,aa(1:257))
set(handles.phase_axes,'XMinorTick','on')
grid on

        
end








% --------------------------------------------------------------------
function varargout = w1_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = w2_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = sample_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = order_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = popupmenu1_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = filter_button_Callback(h, eventdata, handles, varargin)

global select_signal;
global t;

f = 1000*(0:198)/512;
c=conv(select_signal(1:100),handles.h(1:100));
length(c)
figure(1)
plot(f,c)



mag=abs(handles.h);
db=10*log10(mag);
axes(handles.filter_axes1)

grid on


% --- Executes during object creation, after setting all properties.
function win_pop_CreateFcn(hObject, eventdata, handles)
% hObject    handle to win_pop (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
    set(hObject,'BackgroundColor','white');
else
    set(hObject,'BackgroundColor',get(0,'defaultUicontrolBackgroundColor'));
end


% --- Executes on selection change in win_pop.
function win_pop_Callback(hObject, eventdata, handles)
% hObject    handle to win_pop (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

% Hints: contents = get(hObject,'String') returns win_pop contents as cell array
%        contents{get(hObject,'Value')} returns selected item from win_pop





% --------------------------------------------------------------------
function varargout = wp_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = ws_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = fs_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = rp_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = rs_input_Callback(h, eventdata, handles, varargin)




% --------------------------------------------------------------------
function varargout = pushbutton7_Callback(h, eventdata, handles, varargin)
close all;