Communication Systems in MATLAB

 Communication Systems in MATLAB

MATLAB provides tools for simulating and analyzing digital communication systems, including modulation, demodulation, and error correction coding. Here's an example of how to simulate a simple digital communication system using amplitude shift keying (ASK) modulation:

M = 2;                 % set the number of modulation levels

n = 10000;             % set the number of data bits

data = randi([0 M-1],1,n);  % generate random data

fs = 10000;            % set the sampling frequency

fc = 1000;             % set the carrier frequency

t = (0:n-1)/fs;        % create a time vector

s = sqrt(2)*sin(2*pi*fc*t);   % generate the carrier signal

mod_data = s.*(2*data-1);     % perform ASK modulation

snr = 10;              % set the signal-to-noise ratio

rx_data = awgn(mod_data,snr,'measured');  % add Gaussian noise to the modulated data

rx_data_demod = rx_data./s;   % perform ASK demodulation

rx_data_demod(rx_data_demod<0) = 0;  % threshold the demodulated data

err = sum(data~=rx_data_demod);  % calculate the number of bit errors

ber = err/n;           % calculate the bit error rate

disp(['Bit Error Rate: ' num2str(ber)]);