Time division multiplexing

Time division multiplexing in matlab
This program perform TDM for as many signals as you want

function [y]=TDM_nik(x)
% x contains all the signals to be multiplexed
% y is multiplexed signal
%----------------------------------------
% Example: if you have to mutiplex two signals e.g. x1 and x2 (of course both of same length)
% if length is not same append zeros in smaller one to make it equal to larger on
% then make x(1,:)=x1, x(2,x2)...x(r, xr) (if you have r signals to be multiplexed)
% then simple run y=TDM_nik(x)
%-Do it x1=1:10, x2=10:-1:1, x3(1:5)=4, x3(6:10)=-4, x(1,:)=x1, x(2,:)=x2,
% x(3,:)=x3 amd y=TDM_nik(x)
%If you have any problem or feedback please contact me @
%%===============================================
% NIKESH BAJAJ
% Asst. Prof., Lovely Professional University, India
% Almameter: Aligarh Muslim University, India
% +919915522564, bajaj.nikkey@gmail.com
%%===============================================
[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';
figure(1)
sig='x1';
for i=1:r
sig(2)=i+48;
j=mod(i,7)+1;
subplot(r,1,i)
stem(x(i,:),color(j),'linewidth',2)
title(sig)
ylabel('Amplitude')
grid
end
xlabel('Time')
t=1/r:1/r:c;
figure(2)
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')