Matlab Code for Rectangular Wave

I want to generate a rectangular wave of 5 Amplitude with duty cylce 70% and for remaining 30% amplitude is zero. The wave should last for 40 seconds like this and then for 60 seconds it becomes zero. Can someone guide me how to do it?

Answer 1

[Akanksha]

Hey @nisha bhatt,

I hope the following code helps :

% Parameters
amplitude = 5;           % Amplitude of the wave
duty_cycle = 0.7;        % Duty cycle (70%)
period = 1;              % Period of the rectangular wave
total_time = 100;        % Total duration (40s active + 60s zero)
active_time = 40;        % Duration of active wave
inactive_time = 60;      % Duration of zero wave

% Time vector
dt = 0.01;               % Time step
t = 0:dt:total_time;     % Time vector from 0 to total_time

% Initialize wave
wave = zeros(size(t));

% Generate rectangular wave for the active period
for i = 1:length(t)
    if t(i) <= active_time
        % Determine the phase within the current period
        phase = mod(t(i), period);
        
        % Set amplitude based on duty cycle
        if phase < duty_cycle * period
            wave(i) = amplitude;
        else
            wave(i) = 0;
        end
    else
        % Set wave to zero for inactive period
        wave(i) = 0;
    end
end

% Plot the wave
figure;
plot(t, wave, 'LineWidth', 1.5);
xlabel('Time (s)');
ylabel('Amplitude');
title('Rectangular Wave with 70% Duty Cycle and Zero Period');
grid on;
axis([0 total_time -1 amplitude+1]);

This is what I got in the output with the above code :

Hope this helps with the query.