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1. DIGITAL SIGNAL PROCESSING USING MATLAB
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QUADRATURE AMPLITUDE MODULATION (QAM)
This sample assignment shows Phase Error Detection In Quadrature Amplitude Modulation (QAM)
QAM(varargin)
function varargout = QAM(varargin)
% QAM M-file for QAM.fig
% QAM, by itself, creates a new QAM or raises the existing
% singleton*.
%
% H = QAM returns the handle to a new QAM or the handle to
% the existing singleton*.
%
% QAM('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in QAM.M with the given input arguments.
%
% QAM('Property','Value',...) creates a new QAM or raises the
% existing singleton*. Starting from the left, property value pairs are
% applied to the GUI before QAM_OpeningFunction gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to QAM_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
% Copyright 2002-2003 The MathWorks, Inc.
% Edit the above text to modify the response to help QAM
% Last Modified by GUIDE v2.5 19-Apr-2009 22:12:54
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @QAM_OpeningFcn, ...

2. 'gui_OutputFcn', @QAM_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 QAM is made visible.
function QAM_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 QAM (see VARARGIN)
% Choose default command line output for QAM
handles.output = hObject;
% Update handles structure
guidata(hObject, handles);
% UIWAIT makes QAM wait for user response (see UIRESUME)
% uiwait(handles.figure1);
% --- Outputs from this function are returned to the command line.
function varargout = QAM_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 button press in togglebutton1.
function togglebutton1_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)

3. % Hint: get(hObject,'Value') returns toggle state of togglebutton1
% --- Executes on button press in togglebutton2.
function togglebutton2_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton2
figure
M1
% --- Executes on button press in togglebutton11.
function togglebutton11_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton11 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton11
% --- Executes on button press in togglebutton12.
function togglebutton12_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton12 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton12
% --- Executes on button press in togglebutton13.
function togglebutton13_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton13 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton13
% --- Executes on button press in togglebutton14.
function togglebutton14_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton14 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton14

4. figure
M2
% --- Executes on button press in togglebutton15.
function togglebutton15_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton15 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton15
figure
M3
% --- Executes on button press in togglebutton16.
function togglebutton16_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton16 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton16
figure
M4
% --- Executes on button press in togglebutton17.
function togglebutton17_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton17 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton17
figure
M5
% --- Executes on button press in togglebutton18.
function togglebutton18_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton18 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton18
figure
M6
% --- Executes on button press in togglebutton20.
function togglebutton20_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton20 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB

5. % handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton20
figure
M7
% --- Executes on button press in togglebutton21.
function togglebutton21_Callback(hObject, eventdata, handles)
% hObject handle to togglebutton21 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hint: get(hObject,'Value') returns toggle state of togglebutton21
exit
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