matlab program for amplitude modulation

PROGRAM

% amplitude modulated wave

n=0:100;
m=0.3;fm=0.01;fc=0.1;
xm=sin(2*pi*fm*n);
xc=sin(2*pi*fc*n);
y=(1+m*xm).*xc;
stem(n,y);        
grid;
xlabel('time index n');
ylabel('amplitude');

OUTPUT

 

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MATLAB SIMULINK PROGRAM FOR DISCRETE SINE WAVE

 

SINE WAVE
SOURCES->SINE WAVE

SOURCE BLOCK PARAMETERS

SCOPE
SIMULINK->SINK->SCOPE
CLICK ON PARAMETER ICON ON SCOPE DISPLAY
GENERAL
AXES:NO OF AXES:1
TIME RANGE:AUTO
SPECTRUM SCOPE
SIGNAL PROCESSING BLOCKSET->SINKS->SPECTRUM SCOPE
SET THE PROPERTIES AS SHOWN BELOW

CLICK ON SIMULATION ICON ON MODEL WINDOW AND OBSERVE OUTPUT

OUTPUT

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MATLAB SIMULINK PROGRAM FOR CONTINOUS SINE WAVE

BLOCK DIAGRAM

PARAMETERS


SINE WAVE
SOURCES->SINE WAVE

SIMULINK->SINK->SCOPE

CLICK ON PARAMETER ICON ON SCOPE DISPLAY

GENERAL

AXES:NO OF AXES:1

TIME RANGE:AUTO

CLICK ON SIMULATION ICON ON MODEL WINDOW AND OBSERVE OUTPUT

SOURCE BLOCK PARAMETERS

OUTPUT

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MATLAB SIMULINK PROGRAM FOR SINE SQUARED WAVE(WAVEFORM MULTIPLICATION)

SETUP

 

SPECTRUM

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MATLAB PROGRAM FOR Ramp continous and discrete

PROGRAM

% ramp continous and discrete
n=0:.1:10;
subplot(211);         %breaks figure window into 2*1 matrix and select 1st axis for current plot
plot(n,n);                %plotting the value of n against n for getting ramp signal
title('ramp continous');          
xlabel('time');
ylabel('amplitude');
subplot(212);          %breaks figure window into 2*1 matrix and select 2nd axis for current plot
stem(n,n);               %discrete plot
title('ramp discrete');          
xlabel('time');
ylabel('amplitude');

OUTPUT 

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MATLAB PROGRAM FOR Ramp Discrete GENERATION

PROGRAM

% ramp discrete
n=0:.1:10;
stem(n,n);                %discrete plote the value of n against n for getting ramp signal
title('ramp discrete');          
xlabel('time');
ylabel('amplitude');

OUTPUT 

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MATLAB PROGRAM FOR Ramp continous generation

PROGRAM

% ramp continous
n=0:.1:10;
plot(n,n);                %plotting the value of n against n for getting ramp signal
title('ramp continous');          
xlabel('time');
ylabel('amplitude');

OUTPUT 

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Step Wave Continous and Discrete

PROGRAM

% step discrete and continous
n=ones(1,20);         % creates an array of 20 elements with value 1;
x=0:1:19;
subplot(211);        %breaks figure window into 2*1 matrix and select 1st axis for current plot
stem(x,n);              %discrete step wave
title('discrete step');
xlabel('time');
ylabel('amplitude');
subplot(212);    %breaks figure window into 2*1 matrix and select 2nd axis for current plot
plot(x,n);              %continous sine wave
title('continous step');
xlabel('time');
ylabel('amplitude');

OUTPUT 

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matlab program for Step Wave Discrete

PROGRAM

% step discrete
n=ones(1,20);         % creates an array of 20 elements with value 1;
x=0:1:19;              
stem(x,n);      %discrete step wave
title('continous step');
xlabel('time');
ylabel('amplitude');

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MATLAB program for Step Wave Continous generation

PROGRAM

% step continous
n=ones(1,20);         % creates an array of 20 elements with value 1;
x=0:1:19;              
plot(x,n);      %continous step wave
title('continous step');
xlabel('time');
ylabel('amplitude');

OUTPUT 

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matlab program for sine wave generation(Continous and discrete)

Program

% continous sine wave
t=0:.1:10;                                   %create an array t 

a=input('enter the amplitude');
f=input('enter the frequency');
y=a*sin(2*pi*f*t);                      %calculation of sine wave
plot(t,y);                                     %plot the value of t against y
title('continous sinewave');      % title of the graph
xlabel('time');
ylabel('amplitude');

output

% discrete sine wave
clc;                                         %clear command window
t=0:.1:10;                               %create an array t starting from 0 and .1 is the increment and 10 final value
a=input('enter the amplitude');
f=input('enter the frequency');
y=a*sin(2*pi*f*t);                    %calculation of sine wave
stem(t,y);                                 %discrete plot the value of t against y
title('discrete sinewave');         % title of the graph
xlabel('time');
ylabel('amplitude');

OUTPUT

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MATLAB Program to Add 2 Numbers.

Lets Write a simple program to add two Programs
As i had already discussed you can either execute program in the Command Window or save a program as .m file.
1) Executing a program in a Command Window

Just select the Command Window and write the necesary codes as shown below

The figure shows how to add 2 numbers.
Here i have used two variables x and y
just write in the command window x='any value say 2' and y='say2'
then write x+y and press enter.
You wil get Result 4 in the command window as shown above
Simple Huh!
But for larger programs it is neccessary to save the program.


Program to add two numbers using text editor

Select Text Editor by using the Following Step


Select file menu


>select New


>select .m file


>type the program name and save the file and type the program code


NOTE:We can write comments between the codes using the % symbol.just type % and write the codes


Here Goes the Program

clc; %clear command window

x=input(' x='); %accept tha value of x

y=input(' y='); %accept tha value of y

z=x+y;

disp('z='); %display function inbuilt in matlab to display a string

disp(z); %display the value of z

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Introduction to MATLAB

MATLAB(MATrixLABoratory) is a high speed software designed to solve complex engineering problems within a second! It covers all sections of Electronics such as SignalProcessing,Control System,Image Processing,Communication and lot more! It has separate toolboxes for performing this functions.It has many inbuilt functions to perform the complex calculations.In short,MATLAB makes Engineering Computing Easier!

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