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In this paper, we model synchronization error channels as hidden Markov models. Through this model we introduce a rhomboidal trellis for calculating information rates for synchronization error channels. In particular, the introduced trellis is novel due to being synchronized with the channel input sequence, i.e., one trellis section corresponds to one channel input symbol, but (possibly) multiple...
In this paper, we propose a secure transmission scheme based on deleting and inserting symbols. The proposed encryption/decryption method is novel since it achieves secrecy by a transmitter that deliberately introduces synchronization errors (insertions and/or deletions) based on a shared source of randomness. The intended receiver, having access to the same shared source of randomness as the transmitter,...
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