Hi Jassim,
As you are interested to know how to plot digital signal to analog value in MATLAB and aim visualize the signal flow in a telecommunication network digital signal.
Here is an example showing how you can convert a digital signal to an analog signal in MATLAB:
% Define the parameters
n_bits = 3; % Number of bits for each sample
n_samples = 20; % Number of samples in the digital signal
fs = 1000; % Sampling frequency in Hz for the analog signal
% Generate a random digital signal (binary sequence)
digital_signal = randi([0 1], n_samples, n_bits);
% Convert the binary sequence to decimal values
analog_levels = bi2de(digital_signal, 'left-msb');
% Define the analog range
U = 10; % Maximum analog value
q = U / (2^n_bits - 1); % Quantization interval
% Convert digital levels to analog values
analog_signal = analog_levels * q;
% Create a time vector for the analog value signal
t_analog = linspace(0, n_samples/fs, numel(analog_signal));
t_digital = 1:n_samples;
% Plot the digital signal (as a step plot)
subplot(2, 1, 1); % Create a subplot for the digital signal
stairs(t_digital, bi2de(digital_signal, 'left-msb'), 'LineWidth', 2);
title('Digital Signal');
xlabel('Sample Number');
ylabel('Digital Level');
ylim([0 2^n_bits]);
grid on;
% Plot the reconstructed analog value signal
subplot(2, 1, 2); % Create a subplot for the analog signal
plot(t_analog, analog_signal, 'LineWidth', 2);
title('Reconstructed Analog Signal');
xlabel('Time (s)');
ylabel('Analog Value (V)');
ylim([0 U]);
grid on;
I hope this helps.
