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arXiv 1812.00550cs.ITmath.IT
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添加辅助器可完全消除干扰通道中的保密性约束

Adding a Helper Can Totally Remove the Secrecy Constraints in Interference Channel

Jinyuan Chen, Fan Li

摘要:

在许多通信信道中,保密约束通常会导致容量和广义自由度(GDOF)的损失。在这项工作中,我们展示了一个有趣的观察,添加一个助手可以完全消除罚款和GDoF,两个用户对称高斯干扰信道。对于干扰信道,其中每个发射机在没有保密约束的情况下向预期接收机发送消息,总和GDoF是众所周知的“W”曲线,由Etkin-Tse-Wang在2008年表征。如果保密约束施加在这个干扰信道上,其中每个发射机的消息必须是安全的,从非故意的接收器(窃听者),然后一个GDoF的罚款是招致和安全的总和GDoF减少到修改的“W”曲线,由陈最近导出。在这项工作中,我们表明,通过添加一个助手到这个干扰信道的保密约束,安全的总和GDoF原来是一个“W”曲线,这是相同的总和GDoF的设置没有保密约束。所提出的方案是基于合作的干扰和仔细的信号设计,这样的干扰信号的助手是在一个特定的方向和功率电平与发射机的信息信号对齐,这允许完全消除惩罚在GDOF由于保密约束。此外,由于有理独立性,噪声去除和信号分离的估计方法被用于安全率分析。

英文摘要:

In many communication channels, secrecy constraints usually incur a penalty in capacity, as well as generalized degrees-of-freedom (GDoF). In this work we show an interesting observation that, adding a helper can totally remove the penalty in sum GDoF, for a two-user symmetric Gaussian interference channel. For the interference channel where each transmitter sends a message to an intended receiver without secrecy constraints, the sum GDoF is a well-known "W" curve, characterized by Etkin-Tse-Wang in 2008. If the secrecy constraints are imposed on this interference channel, where the message of each transmitter must be secure from the unintended receiver (eavesdropper), then a GDoF penalty is incurred and the secure sum GDoF is reduced to a modified "W" curve, derived by Chen recently. In this work we show that, by adding a helper into this interference channel with secrecy constraints, the secure sum GDoF turns out to be a "W" curve, which is the same as the sum GDoF of the setting without secrecy constraints. The proposed scheme is based on the cooperative jamming and a careful signal design such that the jamming signal of the helper is aligned at a specific direction and power level with the information signals of the transmitters, which allows to totally remove the penalty in GDoF due to the secrecy constraints. Furthermore, the estimation approaches of noise removal and signal separation due to the rational independence are used in the secure rate analysis.

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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