RSMA is used in wireless communication systems so that multiple users to share the same frequency band efficiently, especially in scenarios where multiple users have different QoS requirements. The users are assigned different portions of the available resources based on their QoS requirements.
Simulating a wireless communication system involves modelling various components. I can give you a simple example that demonstrates some basic concepts related to generating data, applying a channel model, and calculating data rates that you can model according to your needs.
Please have a look at the code below, along with the explanation in the comments.
% Generate random data for 2 users: User 1 and User 2
user1_data = randi([0, 1], 1, data_length);
user2_data = randi([0, 1], 1, data_length);
% To simulate the wireless channel effects,
% use the additive white Gaussian noise (AWGN) as a simple channel model.
snr_dB = 20; % Signal-to-noise ratio in dB
snr = 10^(snr_dB/10);
user1_received_signal = awgn(user1_transmitted_signal, snr);
user2_received_signal = awgn(user2_transmitted_signal, snr);
% Implement your RSMA algorithm:
% Here I am assuming Equal bandwidth allocation for the sake of simplicity
% (actual may vary based on your QoS requirements)
user1_bandwidth = total_bandwidth / 2;
user2_bandwidth = total_bandwidth / 2;
%Simulate the system: You can do things like generate data, apply channel models, and calculate SNR, etc.
% An example of data rate calculation based on allocated bandwidth is shown below:
user1_data_rate_achieved = user1_bandwidth * log2(1 + snr);
user2_data_rate_achieved = user2_bandwidth * log2(1 + snr);
% Performance Evaluation based on whether the QoS requirements are met:
% Check if QoS requirements are met
user1_qos_met = user1_data_rate_achieved >= user1_qos_requirement;
user2_qos_met = user2_data_rate_achieved >= user2_qos_requirement;
% Display the results
if user1_qos_met
disp('User 1 QoS requirement met.');
else
disp('User 1 QoS requirement not met.');
end
if user2_qos_met
disp('User 2 QoS requirement met.');
else
disp('User 2 QoS requirement not met.');
end
