The specified codeword length and message length are not valid with using encode hamming

Hello,

i have this code to encode a 7 bit sequence to a 11 bit hamming code.

    n = 11;               
    k = 7;             
    data = randi([0 1],k,1);
    encData = encode(data,n,k,'hamming/binary');

but i get this error:

The specified codeword length and message length are not valid.

How can i solve this problem?

Answer 1

[Walter Roberson]

The formula works out such that you can only encode messages of length k if k = 2^n - n - 1 for some integer n. For example, messages of length 4 11 26 57 120 247 502 1013 2036 4083 ...