On the error exponent of Markov channels with ISI and feedback
We extend Burnashev's [5] classic result for the error exponent of discrete memoryless channels with feedback to the case of Markov channels with ISI and feedback. This is a nontrivial extension of our previous work [6] where we treated the case of Markov channels with feedback but without ISI. Tools from stochastic control theory are used to treat the case with ISI.