论文标题
安全无线电动通信中信息与能源链接之间的相关性
Effect of Correlation between Information and Energy Links in Secure Wireless Powered Communications
论文作者
论文摘要
在本文中，我们从物理层安全性的角度研究了无线电源传输系统中能量和信息链接之间的相关性的影响。以此目的，我们首先确定相关性如何在没有窃听器的情况下影响实用能量收集设置的系统能力。我们量化了，即使链路相关性改善了固定发射功率的平均信噪比（SNR），它也会增加其方差，最终降低容量。基于此观察结果，我们表明，每当这种相关性影响合法用户时，能量和信息链接之间的相关性可能对高/低合法SNR制度的保密能力有害/有益。相反，我们还指出，当严格考虑窃听链接的链接相关性时，它几乎不会影响保密性能，在某些情况下仅导致较小的退化。
In this paper, we investigate the impact of correlation between the energy and information links in wireless power transfer systems, from a physical layer security perspective. With that aim, we first determine how correlation can affect system capacity in practical energy harvesting set-ups in the absence of eavesdroppers. We quantify that even though link correlation improves the average signal-to-noise ratio (SNR) for a fixed transmit power, it also increases its variance, which ultimately degrades capacity. Based on this observation, we show that correlation between the energy and information links may be detrimental/beneficial for the secrecy capacity in the high/low legitimate SNR regime, whenever such correlation affects the legitimate user. Conversely, we also point out that when link correlation for the wiretap link is rigorously accounted for, it barely affects secrecy performance, causing only a minor degradation in some instances.
