A MacWilliams Identity for Convolutional Codes: The General Case
  A MacWilliams Identity for convolutional codes will be established. It makes use of the weight adjacency matrices of the code and its dual, based on state space realizations (the controller canonical form) of the codes in question. The MacWilliams Identity applies to various notions of duality appearing in the literature on convolutional coding theory. 
Heide Gluesing-Luerssen, Gert Schneider