EXPERIMENT - 9

AIM

To plot Continuous and Discrete Random Noise Function in MATLAB.

THEORY

In electronics, noise is a random fluctuation in an electrical signal, a characteristic of all electronic circuits. Noise generated by electronic devices varies greatly, as it can be produced by several different effects.

In communication systems, noise is an error or undesired random disturbance of a useful information signal in a communication channel. The noise is a summation of unwanted or disturbing energy from natural and sometimes man-made sources.

MATLAB COMMANDS USED

* plot(x,y,color,properties)
* rand(t);
* stem(x)

MATLAB CODE

%The Code is for Random wave
t=-10:0.1:10;
y=rand(size(t));
subplot(2,1,1);
plot(t,y,'b');
xlabel('time in seconds');
ylabel('y(t)');
title('Plot of  continuous  Random Noise ');

%Discrete dirac delta ramp
n = -20:1:20;
y_n= rand(size(n));
subplot(2,1,2);
stem(n,y_n,'b','filled');
xlabel('n i.e. Sample number');
ylabel('y(n)');
title('Plot of  discrete Random noise   with 41 samples');

print('Random Noise','-dpng')

RESULT

The Continuous and Discrete versions of Random Noise has been plotted.