通过扰码和ARQ提高物理层安全性
Increasing Physical Layer Security through Scrambled Codes and ARQ
摘要：
在AWGN窃听信道上提出了一种非系统信道编码方案。这种基于加扰的编码技术实现了高传输安全性，而窃听者的信道相对于合法接收者的信道的退化很小。在本文中，我们表明，通过实施加扰和解扰块的级联帧，而不是在单个帧，所需的信道退化进一步减少。级联加扰的使用允许在两个接收器经历相同的信道质量时也实现安全性。然而，在这种情况下，需要引入具有认证的ARQ协议。
英文摘要：
We develop the proposal of non-systematic channel codes on the AWGN wire-tap channel. Such coding technique, based on scrambling, achieves high transmission security with a small degradation of the eavesdropper's channel with respect to the legitimate receiver's channel. In this paper, we show that, by implementing scrambling and descrambling on blocks of concatenated frames, rather than on single frames, the channel degradation needed is further reduced. The usage of concatenated scrambling allows to achieve security also when both receivers experience the same channel quality. However, in this case, the introduction of an ARQ protocol with authentication is needed.
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