Error using nrPolarEncode Expected IN to be binary.

K = 512; % Message length
N = 1024; % Code length
SNR = 2; % Signal-to-Noise Ratio (dB)

% Generate a random message bit sequence
message_binary = logical(randi([0 1], K, 1));

% Encode the message using a polar code
encoder = nError using nrPolarEncode

Error using nrPolarEncode
Expected IN to be binary.

Error in nrPolarEncode>validateInputs (line 142)
validateattributes(in,{'int8','double'},{'binary','column'}, ...

Error in nrPolarEncode (line 74)
validateInputs(in,E,nMax,iIL);

Expected IN to be binary.rPolarEncode(N,K);
codedBits = encoder(message_binary);

% Add AWGN noise to the coded bits
noisyCodedBits = awgn(codedBits,SNR,'measured');

% Decode the noisy coded bits using a polar code
decoder = nrPolarDecode(N,K);
decodedBits = decoder(noisyCodedBits);

% Compute the bit error rate
ber = sum(xor(message_binary,decodedBits))/K;

% Display the results
disp(['Message Length: ' num2str(K)]);
disp(['Code Length: ' num2str(N)]);
disp(['SNR: ' num2str(SNR) ' dB']);
disp(['Bit Error Rate: ' num2str(ber)]);

Answer 1

[Nihal Reddy]

I understand you are facing an error while using the "nrPolarEncode" function.

The syntax for the "nrPolarEncode" function is as follows-

enc = nrPolarEncode(in,E)

The function takes input arguments 'in' which is Input message, specified as a column vector of binary values and 'E' which is Rate-matched output length in bits, specified as a positive integer and returns the polar-encoded output for the input message in and rate-matched output length E.

In your case 'in' input argument is variable 'N' which is not a column vector of binary values that is the reason the error is being thrown. Please ensure that a column vector of binary values is used for 'in' input argument to "nrPolarEncode" function.

Refer to the following MATLAB documentation for more information-

Polar encoding - MATLAB nrPolarEncode (mathworks.com)