论文标题
使用零努力的人造噪声来保护空中计算
Secure Over-the-Air Computation using Zero-Forced Artificial Noise
论文作者
论文摘要
过直的计算有可能提高数据依赖数据分布式无线系统的通信效率，但很容易窃听。在存在被动窃听器的情况下，我们考虑对逐渐变化的白色高斯噪声通道进行空中计算。目的是设计安全的空中计算方案。我们提出了一个方案，该方案通过使用零努力的人工噪声来实现对窃听者的MSE安全性，同时将变形保持在合法的接收器中。与以前的方法相反，安全性并不依赖于外部辅助节点来堵塞窃听者的接收信号。我们彻底设计了该计划的系统参数，提出了一种人工噪声设计，该设计利用未使用的发射电源来确保安全，并提供明确的施工规则。如果窃听器的通道系数已知，并且信号设计中未知，我们的设计方法都适用于两种情况。模拟证明了性能，并表明我们的噪声设计优于其他方法。
Over-the-air computation has the potential to increase the communication-efficiency of data-dependent distributed wireless systems, but is vulnerable to eavesdropping. We consider over-the-air computation over block-fading additive white Gaussian noise channels in the presence of a passive eavesdropper. The goal is to design a secure over-the-air computation scheme. We propose a scheme that achieves MSE-security against the eavesdropper by employing zero-forced artificial noise, while keeping the distortion at the legitimate receiver small. In contrast to former approaches, the security does not depend on external helper nodes to jam the eavesdropper's received signal. We thoroughly design the system parameters of the scheme, propose an artificial noise design that harnesses unused transmit power for security, and give an explicit construction rule. Our design approach is applicable in both cases, if the eavesdropper's channel coefficients are known and if they are unknown in the signal design. Simulations demonstrate the performance, and show that our noise design outperforms other methods.
