Code covered by the BSD License  

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Time Division Multiplexing GUI

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Time Division Multiplexing GUI

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This GUI simulates time division multiplexing between three discrete-time signals as a small example

tdm(varargin)
function varargout = tdm(varargin)
% TDM M-file for tdm.fig
%      TDM, by itself, creates a new TDM or raises the existing
%      singleton*.
%
%      H = TDM returns the handle to a new TDM or the handle to
%      the existing singleton*.
%
%      TDM('CALLBACK',hObject,eventData,handles,...) calls the local
%      function named CALLBACK in TDM.M with the given input arguments.
%
%      TDM('Property','Value',...) creates a new TDM or raises the
%      existing singleton*.  Starting from the left, property value pairs are
%      applied to the GUI before tdm_OpeningFcn gets called.  An
%      unrecognized property name or invalid value makes property application
%      stop.  All inputs are passed to tdm_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 tdm

% Last Modified by GUIDE v2.5 08-Oct-2011 16:12:44

% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name',       mfilename, ...
                   'gui_Singleton',  gui_Singleton, ...
                   'gui_OpeningFcn', @tdm_OpeningFcn, ...
                   'gui_OutputFcn',  @tdm_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 tdm is made visible.
function tdm_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 tdm (see VARARGIN)

% Choose default command line output for tdm
handles.output = hObject;

% Update handles structure
guidata(hObject, handles);

% UIWAIT makes tdm wait for user response (see UIRESUME)
% uiwait(handles.figure1);


% --- Outputs from this function are returned to the command line.
function varargout = tdm_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;



function edit_x1_Callback(hObject, eventdata, handles)
% hObject    handle to edit_x1 (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 edit_x1 as text
%        str2double(get(hObject,'String')) returns contents of edit_x1 as a double


% --- Executes during object creation, after setting all properties.
function edit_x1_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit_x1 (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



function edit_x2_Callback(hObject, eventdata, handles)
% hObject    handle to edit_x2 (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 edit_x2 as text
%        str2double(get(hObject,'String')) returns contents of edit_x2 as a double


% --- Executes during object creation, after setting all properties.
function edit_x2_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit_x2 (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



function edit_x3_Callback(hObject, eventdata, handles)
% hObject    handle to edit_x3 (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 edit_x3 as text
%        str2double(get(hObject,'String')) returns contents of edit_x3 as a double

% --- Executes during object creation, after setting all properties.
function edit_x3_CreateFcn(hObject, eventdata, handles)
% hObject    handle to edit_x3 (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 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)

clc

x1=str2num(get(handles.edit_x1,'string'));
x2=str2num(get(handles.edit_x2,'string'));
x3=str2num(get(handles.edit_x3,'string'));

set(handles.axes_x1,'visible','on')
set(handles.axes_x2,'visible','on')
set(handles.axes_x3,'visible','on')

x=[x1;x2;x3];
[r c]=size(x);
k=0;
% Multiplexing
for i=1:c
    for j=1:r
    k=k+1;
    y(k)=x(j,i);
    end
end

% Ploting
color='ybrgmkc';
sig='x1';
for i=1:r
    sig(2)=i+48;
    j=mod(i,7)+1;
    if i==1
        axes(handles.axes_x1)
    elseif i==2
        axes(handles.axes_x2)
    elseif i==3
        axes(handles.axes_x3)
    end
    stem(x(i,:),color(j),'linewidth',2)
    title(sig)
    ylabel('Amplitude')
    grid
end
xlabel('Time')

t=1/r:1/r:c;
axes(handles.axes4)
for i=1:r
  j=mod(i,7)+1;
  stem(t(i:r:r*c),y(i:r:r*c),color(j),'linewidth',2)
  hold on
  grid
end
hold off
title('Time Division Multiplexed Sequence')
xlabel('Time')
ylabel('Amplitude')

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