This project is to investigate PSK31 with octave/MATLAB.
It is available under the GPL license available from the Free
Software foundation here.
http://gplv3.fsf.org/

make_bits.m and alpha.txt, and load_alpha.m which do the varicode encoding are available 
from MATHWORKs under BSD license here:

http://www.mathworks.com/matlabcentral/fileexchange/2839-psk31-model-with-symbol-timing-and-carrier-recovery/all_files

Rob Frohne, KL7NA