Entropy 2013, 15(9), 3910-3930; doi:10.3390/e15093910
Article

Permutation Complexity and Coupling Measures in Hidden Markov Models

1,* email and 2email
Received: 24 July 2013; in revised form: 29 August 2013 / Accepted: 11 September 2013 / Published: 16 September 2013
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Recently, the duality between values (words) and orderings (permutations) has been proposed by the authors as a basis to discuss the relationship between information theoretic measures for finite-alphabet stationary stochastic processes and their permutatio nanalogues. It has been used to give a simple proof of the equality between the entropy rate and the permutation entropy rate for any finite-alphabet stationary stochastic process and to show some results on the excess entropy and the transfer entropy for finite-alphabet stationary ergodic Markov processes. In this paper, we extend our previous results to hidden Markov models and show the equalities between various information theoretic complexity and coupling measures and their permutation analogues. In particular, we show the following two results within the realm of hidden Markov models with ergodic internal processes: the two permutation analogues of the transfer entropy, the symbolic transfer entropy and the transfer entropy on rank vectors, are both equivalent to the transfer entropy if they are considered as the rates, and the directed information theory can be captured by the permutation entropy approach.
Keywords: duality; permutation entropy; excess entropy; transfer entropy; directed information
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MDPI and ACS Style

Haruna, T.; Nakajima, K. Permutation Complexity and Coupling Measures in Hidden Markov Models. Entropy 2013, 15, 3910-3930.

AMA Style

Haruna T, Nakajima K. Permutation Complexity and Coupling Measures in Hidden Markov Models. Entropy. 2013; 15(9):3910-3930.

Chicago/Turabian Style

Haruna, Taichi; Nakajima, Kohei. 2013. "Permutation Complexity and Coupling Measures in Hidden Markov Models." Entropy 15, no. 9: 3910-3930.

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