arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1605.05693cs.ITmath.IT
收藏

依赖于状态的窃听信道的容量:在脏纸上的安全书写

Capacity of the State-Dependent Wiretap Channel: Secure Writing on Dirty Paper

Hamid G. Bafghi, Babak Seyfe, Mahtab Mirmohseni, Mohammad Reza Aref

摘要:

在本文中,我们考虑的状态依赖窃听信道(SD-WC)。作为主要思想,我们模型的SD-WC作为认知干扰信道(CIC),其中主接收机作为一个窃听器的认知发射机的消息。从这个角度来看,SD-WC中的信道状态信息(CSI)在CIC中扮演着主用户消息的角色,可以在窃听者处解码。这一思想使我们能够使用CIC的主要可验证性方法,即。例如,GPC和叠加编码(SPC),以找到SD-WC的新的可实现的等效率。我们表明,这些方法满足的能力下的信道状态的速率的一些约束。类似于脏纸信道,将结果扩展到高斯情况,表明GPC导致高斯SD-WC的容量等于窃听信道的容量,而没有信道状态。因此,我们使用脏纸技术实现了高斯SD-WC的容量。此外,我们提出的方法提供了二进制SD-WC的能力。结果表明,二进制SD-WC的容量等于没有信道状态的二进制窃听信道的容量。

英文摘要:

In this paper we consider the State-Dependent Wiretap Channel (SD-WC). As the main idea, we model the SD-WC as a Cognitive Interference Channel (CIC), in which the primary receiver acts as an eavesdropper for the cognitive transmitter's message. By this point of view, the Channel State Information (CSI) in SD-WC plays the role of the primary user's message in CIC which can be decoded at the eavesdropper. This idea enables us to use the main achievability approaches of CIC, i.~e., Gel'fand-Pinsker Coding (GPC) and Superposition Coding (SPC), to find new achievable equivocation-rates for the SD-WC. We show that these approaches meet the capacity under some constraints on the rate of the channel state. Similar to the dirty paper channel, extending the results to the Gaussian case shows that the GPC lead to the capacity of the Gaussian SD-WC which is equal to the capacity of the wiretap channel without channel state. Hence, we achieve the capacity of the Gaussian SD-WC using the dirty paper technique. Moreover, our proposed approaches provide the capacity of the Binary SD-WC. It is shown that the capacity of the Binary SD-WC is equal to the capacity of the Binary wiretap channel without channel state.

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。

↑