How to do Amplitude Shift Keying (ASK) using MATLAB

1.Introduction:-
Amplitude Shift Keying(ask) is the simplest method of modulation. the amplitude of carrier wave varies with respect to the amplitude of square pulse. The of achieving of ASK is to switching OFF the carrier when the pulse amplitude is '0' and switching ON when carrier when the pulse amplitude is '1'.this method is called as ON-OFF keying.



2.Problem Statement:-
To generate the ASK wave using MATLAB and plot the carrier ,square pulse and ASK signal on figure window.


3.Program:-
clc;
clear all;
close all;
f1=input('Enter the frequency of carrier=');
f2=input('Enter the frequency of pulse=');
a=3;
t=0:0.001:1;
x=a*sin(2*pi*f1*t);
u=a/2*square(2*pi*f2*t)+a/2;
v=x.*u;
subplot(3,1,1);
plot(t,x);
xlabel('time');
ylabel('amplitude');
title('carrier');
grid on;
subplot(3,1,2);
plot(t,u);
xlabel('time');
ylabel('amplitude');
title('square pulse');
grid on;
subplot(3,1,3);
plot(t,v);
xlabel('time');
ylabel('amplitude');
title('ask modulated signal');
grid on;


4.How to use this code:-
Here you have to only copy the code to MATLAB and just run it and after this you have to give the value of frequency of carries wave and square pulses.

5.Output :-
 Figure Window  
                                 



Command Window

                                                     



6.Conclusion -
Here we have successfully plot the ASK using the MATLAB.



For any question contact me on: akshayadivarekar777@gmail.com

Comments

Post a Comment

Popular post

How to add ,read,insert IMAGE in MATLAB

Image
1) Statement of Problem :- Here we are going to see how to add image in MATLAB. 2) Program :- %% Read Image Inputimage=imread('C:\Users\akshay\Downloads\pi.jpg'); %% Show image figure(1) imshow(Inputimage); title('INPUT IMAGE') 3) Explanation :- Inputimage=imread('C:\Users\akshay\Downloads\pi.jpg'); In this instruction MATLAB reads the image from the location which is given by user here i have given the location which is  Inputimage=imread(' C:\Users\akshay\Downloads\pi.jpg '); while giving the location you have to remember some point 1) The must be in  single quotations marks. ex.  'your location' 2) After giving location you must have to give the name of file with its extension which is in this example is pi.jpg. figure(1) This instruction creates the figure window for you. imshow(Inputimage); This instruction is use to display or show the image which is given by user. As here the input image which is given by user is
Read more

How to plot different discrete signal using MATLAB

Image
1. Introduction :- Here we are going to plot 1) unit impulse function 2) unit step signal 3) Ramp signal 4) sine signal 5) rising exponential 6) decaying exponential 2 . Problem Statement :- To plot different discrete signal using MATLAB. 3. Program :- clc; close all; clear all; n=-10:10; % unit impulse function a=1*(n==0); subplot(3,2,1) stem(n,a) xlabel('n discrete time') ylabel('magnitude') title('unit impulse') % unit step function b=1*(n>=0)+0*(n<0); subplot(3,2,2) stem(n,b) xlabel('n discrete time') ylabel('magnitude') title('unit step') % unit ramp function c=n.*(n>=0)+0*(n<0); subplot(3,2,3) stem(n,c) xlabel('n discrete time') ylabel('magnitude') title('unit ramp') % unit sine function f=7/8; mag=1 d=mag*sin(2*pi*f*n); subplot(3,2,4) stem(n,d) xlabel('n discrete time') ylabel('magnitude') title('sine function') % rising expon
Read more

How to do Frequency Shift Keying (FSK) using MATLAB

Image
1. Introduction :- In FSK the modulated signal is shifted in steps that is from one frequency to another frequency depending on the digital pulse.If the higher frequency is used for represent the data '1' then lower frequency is used for represent '0'. 2 . Problem Statement :- To generate the FSK wave using MATLAB and plot the carrier ,square pulse and FSK signal on figure window. 3. Program :- clc; clear all; close all; t=0:0.0001:1; fm=4; m=[ones(1,900) zeros(1,1500) ones(1,1000) zeros(1,1500) ones(1,1000) zeros(1,1500) ones(1,2601)]; subplot(4,1,1); plot(t,m); axis([0 1 0 1.5]) title('modulating signal'); xlabel('time'); ylabel('amplitude'); fc1=input('enter the value of carrier 1='); fc2=input('enter the value of carrier 2='); c1=4*sin(2*pi*fc1*t); c2=4*sin(2*pi*fc2*t); subplot(4,1,2); plot(t,c1); title('carrier signal 1'); xlabel('time'); ylabel('amplitude'); subplot(4,1
Read more