Random bit stream

Matlab program to generate Random bit stream by using standard uniform distribution (rand) function.

Matlab code

clc;  
clear all;
close all;
n=input(''Enter the no of bit= ');
r=input('Enter the Bite Rate (In bits/sec) = ');
tpb=1/r;                    % Time duration for per bit
x=rand(1,n);             % Standard uniform distribution on the open interval (0,1)
disp('x='); disp(x);    % Displays text or array 

  for i=1:length(x)
       if x(i)>=0.5
           B(i)=1;
       else
           B(i)=0;
       end;
   end;
disp('Random bit stream = ');disp(B);

t1=0;                 %Temporary variable for time
Time=[];           %Variable for store time
Bitstream=[];    %Variable for store Bit stream
for i=1:length(B)
    if B(i)==0                         % When bit is 0 --
        t=t1:0.001:t1+tpb;        % for time duration tpb behaviour of-- 
        Bs=zeros(1,length(t));  % Bit stream.
    else
        t=t1:0.001:t1+tpb;
        Bs=ones(1,length(t));
    end;
    Time=[Time t];                       %storing tpb duration of time
    Bitstream=[Bitstream Bs];      %storing Bit stream in tpb duration 
    t1=t1+tpb;                               %initial value of next tpb duration for iteration
end;
plot(Time,Bitstream);
axis([0 tpb*n -2 2])
xlabel('Time');
ylabel('Amplitude');
title('Random bit stream');

Command window

Enter the no of bit= 15

Enter the Bite Rate (In bits/sec) = 1

x=

  Columns 1 through 9

    0.6491    0.7317    0.6477    0.4509    0.5470    0.2963    0.7447    0.1890    0.6868

  Columns 10 through 15

    0.1835    0.3685    0.6256    0.7802    0.0811    0.9294

Random bit stream = 

     1     1     1     0     1     0     1     0     1     0     0     1     1     0     1

Figure window