Digital iVision Labs!

Amplitude modulation (AM) is a method of superimposing the message onto an alternating carrier waveform.The highest frequency of the modulating signal (Message Signal) is normally < 10 % of the carrier frequency. The instantaneous amplitude of the modulated wave varies as per the amplitude of the message signal.

MATLAB Code For Amplitude Modulation:

clc;
clear all;
close all;

Ac=2; %carrier amplitude
fc=0.5; %carrier frequency
Am=.5; %message signal amplitude
fm=.05; %message signal frequency
Fs=100; %sampling rate/frequency

ka=1;%Amplitude Sensitivity

t=[0:0.1:50];%defining the time range & disseminating it into samples
ct=Ac*cos(2*pi*fc*t); %defining the carrier signal wave
mt=Am*cos(2*pi*fm*t); %defining the message signal
AM=ct.*(1+ka*mt); %Amplitude Modulated wave, according to the standard definition

subplot(3,1,1);%plotting the message signal wave
plot(mt);
ylabel('Message signal');

subplot(3,1,2); %plotting the carrier signal wave
plot(ct);
ylabel('carrier');

subplot(3,1,3); %plotting the amplitude modulated wave
plot(AM);
ylabel('AM signal');


Screenshot of the output:

MATLAB Code to Simulate / Generate the Amplitide Modulation Signal (AM Signal) [ Amplitude Modulation using MATLAB]

Visit More On Digital iVision Labs:
#FSK Simulation Code Using MATLAB
#Phase Shift Keying (PSK) Modulation MATLAB Simulation, With MATLAB Code

#Amplitude Shift Keying (ASK) Modulation MATLAB Simulation, With MATLAB Code

#Using MATLAB, Extracting individual Red, Blue & Green (RGB) planes, From a RGB Image, With Code

#Matlab Christmas Tree Plot- Christmas celebration through matlab way - Merry Christmas!

Author: Vibhutesh Kumar Singh

An active & prominent author at Digital iVision Labs! Specializing in MATLAB, C++, Arduino, OpenCV, NI Labview, Web Designing & other Electronics stuffs! Just started M.Tech. From IIIT Delhi, looking for excellent PhD Opportunities with prominent researchers. Drop a mail: vibhutesh[at]gmail.com or Follow him at....

Facebook

Twitter

Google+

Linkedin