ABSTRACT
The Wonham filter, which estimates a Markov chain observed in Brownian noise, is considered. However, the parameters of the observation process are not known. Maximizing the un-normalized probabilities of the Zakai equation over the parameters leads to a Nash equilibrium whose solution is discussed using the stochastic control results of Peng and Yong and Zhou.
Funding
The support of the ARO is gratefully acknowledged.