Line Coding Techniques in Matlab

In this article I will start with the basics of MATLAB for writing scripts.I have written this MATLAB scripts for simulating the working of Digital Communication line trainer of Line Coding type Unipolar RZ.I will not delve into detail about the line coding technique as it is pretty basic.

First of all check out the simulation snapshot of the output of the scripts on Figure 1.

As you can see from the screenshot I have set the input data as 11110000 and we can see the corresponding output.

Let us see the data line by line

Let It is required to clear the console area and clear all the variables that were being used in MATLAB Command area.So to achieve that we use these commands.

close all;

This command closes all the active windows previously running.

clc;

clear all;

close all;

It is required to clear the console area and clear all the variables that were being used in MATLAB

Command area. So, to achieve that we use these commands.

 Now we will define a line matrix variable bits of 8-bit length, this is the data variable for showing the input data.You can see the

bits = [1 1 1 1 0 0 0 0 0];

bitrate = 1; % bits per second

 Now we will call the urz  function of matlab for variable bits of 8-bit length,the output of this function is used for plotting the output   

I have attached the code for your reference I hope this helps.Soon I will add more line coding techniques. 

  

Source Code(Contents of unipolar.m)

clc;

clear all;

close all;

%bits=input('Enter bit sequence of 9-bit width : ');

bits = [1 1 1 1 0 0 0 0 0];

bitrate = 1; % bits per second

figure;

subplot(4,1,2);

[t,s] = urz(bits,bitrate);

plot(t,s,'LineWidth',3);

axis([0 t(end) -0.1 1.1])

grid on;

hold on;

title(['Unipolar RZ: [' num2str(bits) ']']);