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Bit-wise unequal error protection problem with two layers is considered for variable length block-codes with feedback. Inner and outer bounds are derived for achievable performance for finite expected decoding time. These bounds completely characterize the error exponent of the special bits as a function of overall rate R, overall error exponent E and the rate of the special bits Rs. Single message...
We consider a family of channels, collectively referred to as the `chemical channel', which generalizes the trap-door channel. We show that the feedback capacity of the chemical channel can be cast as the solution to a dynamic programming (DP) problem. We obtain numerical values for the feedback capacity of the chemical channel by approximating the solution of the DP problem using value iteration...
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