matlab working codes for TDMA FDMA CSMA ALOHA SALOHA

Sure, here are the MATLAB codes for TDMA, FDMA, CSMA, ALOHA, and Slotted ALOHA.

1. TDMA (Time Division Multiple Access):

% TDMA MATLAB code
num_users = 4; % Number of users
num_slots = 8; % Number of time slots

% Generate random data for each user
data = randi([0 1], num_users, num_slots);

% Initialize the TDMA matrix
tdma_matrix = zeros(num_users, num_slots);

% Assign time slots to each user
for i = 1:num_users

tdma_matrix(i,:) = data(i,:);

end

disp('TDMA Matrix:');
disp(tdma_matrix);

2. FDMA (Frequency Division Multiple Access):

% FDMA MATLAB code
num_users = 4; % Number of users
num_channels = 8; % Number of frequency channels

% Generate random data for each user
data = randi([0 1], num_users, num_channels);

% Initialize the FDMA matrix
fdma_matrix = zeros(num_users, num_channels);

% Assign frequency channels to each user
for i = 1:num_users

fdma_matrix(i,:) = data(i,:);

end

disp('FDMA Matrix:');
disp(fdma_matrix);

3. CSMA (Carrier Sense Multiple Access):

% CSMA MATLAB code
num_users = 4; % Number of users
num_slots = 8; % Number of time slots

% Generate random data for each user
data = randi([0 1], num_users, num_slots);

% Initialize the CSMA matrix
csma_matrix = zeros(num_users, num_slots);

% Check for carrier sense and assign time slots to each user
for i = 1:num_users

for j = 1:num_slots
    if sum(csma_matrix(:,j)) == 0 % If time slot is empty
        csma_matrix(i,j) = data(i,j);
    end
end

end

disp('CSMA Matrix:');
disp(csma_matrix);

4. ALOHA:

% ALOHA MATLAB code
num_users = 4; % Number of users
num_slots = 8; % Number of time slots

% Generate random data for each user
data = randi([0 1], num_users, num_slots);

% Initialize the ALOHA matrix
aloha_matrix = zeros(num_users, num_slots);

% Send packets randomly with a certain probability
for i = 1:num_users

for j = 1:num_slots
    if rand < 0.5 % Probability of sending a packet
        aloha_matrix(i,j) = data(i,j);
    end
end

end

disp('ALOHA Matrix:');
disp(aloha_matrix);

5. Slotted ALOHA:

% Slotted ALOHA MATLAB code
num_users = 4; % Number of users
num_slots = 8; % Number of time slots

% Generate random data for each user
data = randi([0 1], num_users, num_slots);

% Initialize the Slotted ALOHA matrix
slotted_aloha_matrix = zeros(num_users, num_slots);

% Send packets in available time slots
for j = 1:num_slots

num_packets = sum(data(:,j)); % Number of packets in the current slot
if num_packets == 1
    user_index = find(data(:,j)); % Index of the user who sent the packet
    slotted_aloha_matrix(user_index,j) = 1;
elseif num_packets > 1
    % Collision occurred, no packets transmitted
end

end

disp('Slotted ALOHA Matrix:');
disp(slotted_aloha_matrix);

These codes simulate the working of TDMA, FDMA, CSMA, ALOHA, and Slotted ALOHA access methods. You can modify them or add more functionalities as per your requirements.