Help Required for "vitdec" built-in command of of MATLAB

Hi All

I want to know how one can initialize a particular state (not necessarily
zero state) for "vitdec" built-in command of MATLAB?

I want to use this functionality for Tail-Biting Viterbi Decoding in which
decoder saves state while trellis construction as well as traceback.
Any reply, would be appreciable.
Thank you.


Hope to hear from you soon.


Best Regards
Ahmed SALIM