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DSB-SC in MATLAB

 

MATLAB Script

% The code is developed by SalimWireless.Com

clc;
clear;
close all;


% Parameters

frequency = 10; % Message signal frequency (Hz)
carrier_frequency = 100; % Carrier signal frequency (Hz)
fs = 1000; % Sampling frequency



% Time values
t = linspace(0, 1, 10000);


% Message signal
message_signal = sin(2 * pi * frequency * t);


% Carrier signal

carrier_signal = cos(2 * pi * carrier_frequency * t);



% DSB-SC Modulation

dsbsc_modulated_signal = message_signal .* carrier_signal;



% DSB-SC Demodulation

dsbsc_demodulated_signal = dsbsc_modulated_signal .* carrier_signal;


% Low-pass filter

lpf_cutoff = frequency; % Low-pass filter cutoff frequency
[b, a] = butter(6, lpf_cutoff / (0.5 * fs)); % 6th-order Butterworth filter
dsbsc_demodulated_signal_filtered = filter(b, a, dsbsc_demodulated_signal);


% Plot results

figure;

% Subplot 1: Message signal

subplot(3, 1, 1);
plot(t, message_signal, 'b');
title('Message Signal');
xlabel('Time');
ylabel('Amplitude');
grid on;


% Subplot 2: DSB-SC Modulated Signal
subplot(3, 1, 2);
plot(t, dsbsc_modulated_signal, 'r');
title('DSB-SC Modulated Signal');
xlabel('Time');
ylabel('Amplitude');
grid on;


% Subplot 3: DSB-SC Demodulated Signal
subplot(3, 1, 3);
plot(t, dsbsc_demodulated_signal_filtered, 'g');
title('DSB-SC Demodulated Signal (Filtered)');
xlabel('Time');
ylabel('Amplitude');
grid on;


% Optional: Adjust spacing for better visualization
sgtitle('DSB-SC Modulation and Demodulation');

Output






Copy the MATLAB Code above from here


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Admin & Author: Salim

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  Interests: Signal Processing, Telecommunication, 5G Technology, Present & Future Wireless Technologies, Digital Signal Processing, Computer Networks, Millimeter Wave Band Channel, Web Development
  Seeking an opportunity in the Teaching or Electronics & Telecommunication domains.
  Possess M.Tech in Electronic Communication Systems.


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