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arXiv 1402.0993cs.ITmath.IT
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击败入侵者:基于可重构NAS的可扩展保密容量

Defeating the Eavesdropper: On the Achievable Secrecy Capacity using Reconfigurable Antennas

Ahmed M. Alaa

摘要:

在本文中,我们考虑在慢衰落无线信道中存在窃听者的机密信息的传输。我们提出了一种传输方案,采用一个可重新配置的天线在每个合法的合作伙伴,而窃听者使用一个传统的天线。可重构天线可以随着时间的推移切换其传播特性,从而感知不同的衰落信道。它示出,没有信道侧信息(CSI)在合法的合作伙伴,主信道可以被转换成遍历制度提供严格的中断约束的\textit{secrecy capacity}增益。如果合法合作伙伴有部分或全部的信道侧信息(CSI),一种选择多样性,可以应用提高最大的秘密通信速率。在这种情况下,衰落是朋友而不是敌人。

英文摘要:

In this paper, we consider the transmission of confidential messages over slow fading wireless channels in the presence of an eavesdropper. We propose a transmission scheme that employs a single reconfigurable antenna at each of the legitimate partners, whereas the eavesdropper uses a single conventional antenna. A reconfigurable antenna can switch its propagation characteristics over time and thus it perceives different fading channels. It is shown that without channel side information (CSI) at the legitimate partners, the main channel can be transformed into an ergodic regime offering a \textit{secrecy capacity} gain for strict outage constraints. If the legitimate partners have partial or full channel side information (CSI), a sort of selection diversity can be applied boosting the maximum secret communication rate. In this case, fading acts as a friend not a foe.

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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