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arXiv 1708.02501cs.ITmath.IT
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在发射机处具有隐藏状态信息的隐蔽通信

Covert Communication with Channel-State Information at the Transmitter

Si-Hyeon Lee, Ligong Wang, Ashish Khisti, Gregory W. Wornell

摘要:

我们考虑的问题,隐蔽通信在一个依赖于状态的信道,其中发射机有因果或非因果的信道状态的知识。这里,“隐蔽”意味着当发送者发送消息时和不发送消息时,通道上的管理员应该观察到类似的统计数据。当一个足够长的秘密密钥之间共享的发送器和接收器,我们推导出封闭形式的公式的最大可实现的隐蔽通信速率(“隐蔽容量”)离散无记忆信道,当发送器的信道状态信息(CSI)是非因果的,加性高斯白噪声(AWGN)信道。对于某些信道模型,包括AWGN信道,我们表明,隐蔽容量是积极的CSI在发送端,但没有CSI是零。我们还推导出的秘密密钥,发送器和接收器,以实现隐蔽容量的速率上的下限。

英文摘要:

We consider the problem of covert communication over a state-dependent channel, where the transmitter has causal or noncausal knowledge of the channel states. Here, "covert" means that a warden on the channel should observe similar statistics when the transmitter is sending a message and when it is not. When a sufficiently long secret key is shared between the transmitter and the receiver, we derive closed-form formulas for the maximum achievable covert communication rate ("covert capacity") for discrete memoryless channels and, when the transmitter's channel-state information (CSI) is noncausal, for additive white Gaussian noise (AWGN) channels. For certain channel models, including the AWGN channel, we show that the covert capacity is positive with CSI at the transmitter, but is zero without CSI. 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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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