non orthogonal multiple access in matlab

main.m
% Generating random data for users
numUsers = 5;
data = randi([0,1], 100, numUsers); 

% Creating signature sequences for users
signature = [1 1 -1 -1 1; 
             1 -1 -1 1 1;
             -1 -1 1 1 1;
             -1 1 1 -1 -1;
             1 -1 1 -1 -1];

% Modulating data with signature sequences
modulatedData = data*signature;

% Adding noise to modulated data
noisyData = awgn(modulatedData, 10);

% Demodulating data
demodulatedData = noisyData ./ signature;

% Decoding data
decodedData = round(demodulatedData); 

% Calculating bit error rate
bitErrorRate = sum(sum(abs(decodedData - data))) / (numUsers * size(data,1));
disp(['Bit Error Rate: ', num2str(bitErrorRate)]);
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