Covert Communication with Noncausal Channel-State Information at the Transmitter

Abstract : We consider the problem of covert communication over a state-dependent channel, where the transmitter has non-causal knowledge of the channel states. Here, " covert " means that the probability that a warden on the channel can detect the communication must be small. In contrast with traditional models without noncausal channel-state information at the transmitter , we show that covert communication can be possible with positive rate. We derive closed-form formulas for the maximum achievable covert communication rate (" covert capacity ") in this setting for discrete memoryless channels as well as additive white Gaussian noise channels. We also derive lower bounds on the rate of the secret key that is needed for the transmitter and the receiver to achieve the covert capacity.
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Communication dans un congrès
International Symposium on Information Theory, Jun 2017, Aachen, Germany
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Soumis le : mercredi 5 juillet 2017 - 14:33:41
Dernière modification le : lundi 17 juillet 2017 - 09:36:37

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Si-Hyeon Lee, Ligong Wang, Ashish Khisti, Gregory Wornell. Covert Communication with Noncausal Channel-State Information at the Transmitter. International Symposium on Information Theory, Jun 2017, Aachen, Germany. 〈hal-01556729〉

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