Covert Communication Over a Compound Channel
Covert Communication Over a Compound Channel
复制标题
通过复合通道进行隐蔽通信
DOI：
--
复制
发表时间：
2019
期刊：
影响因子：
--
通讯作者：
V. Tan
中科院分区：
文献类型：
--
作者：
Sadaf Salehkalaibar;M. Yassaee;V. Tan
在本文中，我们考虑了复合信道的基本通信限制。信息论背景下的隐蔽通信主要涉及发射机希望与合法接收机通信时的基本限制，同时确保通信不被对手检测到。然而，本文认为，另一种选择，同样重要的是，设置中，被掩蔽的对象是复合通道的状态。这样的通信模型在防止恶意方试图在例如发现无线信道的信噪比低时干扰通信信号方面具有应用。我们的主要贡献是建立的吞吐量关键区域的界限时，隐蔽性约束的总变化距离的定义。此外，对于密钥长度是无限的情况下，我们提供了一个充分条件，当边界重合的吞吐量的缩放，它遵循平方根定律。数值例子，包括高斯信道，来说明我们的结果。
In this paper, we consider fundamental communication limits over a compound channel. Covert communication in the information-theoretic context has been primarily concerned with fundamental limits when the transmitter wishes to communicate to legitimate receiver(s) while ensuring that the communication is not detected by an adversary. This paper, however, considers an alternative, and no less important, setting in which the object to be masked is the state of the compound channel. Such a communication model has applications in the prevention of malicious parties seeking to jam the communication signal when, for example, the signal-to-noise ratio of a wireless channel is found to be low. Our main contribution is the establishment of bounds on the throughput-key region when the covertness constraint is defined in terms of the total variation distance. In addition, for the scenario in which the key length is infinite, we provide a sufficient condition for when the bounds coincide for the scaling of the throughput, which follows the square-root law. Numerical examples, including that of a Gaussian channel, are provided to illustrate our results.