准静态衰减信道上无侧信息预共享和信道估计的隐蔽通信

Hiroki Fukada, Hiroki Iimori, Chandan Pradhan, Szabolcs Malomsoky, Naoki Ishikawa
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引用次数: 0

摘要

我们提出了一种新的隐蔽通信方案,利用高斯分布的格拉斯曼星座进行非相干检测,无需预先共享侧信息和信道估计。通过在格拉斯曼流形上设计恒幅符号并将其与随机变量相乘,我们生成了遵循任意概率分布(如高斯分布或偏正态分布)的信号。流形的数学特性使发射机的随机变量不与接收机共享,并消除了可能影响隐蔽性的先导符号。与传统的相干高斯信号方案相比,所提出的方案实现了更高的覆盖率和可实现率,而在复杂性方面没有任何损失。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Covert Communications Without Pre-Sharing of Side Information and Channel Estimation Over Quasi-Static Fading Channels
We propose a new covert communication scheme that operates without pre-sharing side information and channel estimation, utilizing a Gaussian-distributed Grassmann constellation for noncoherent detection. By designing constant-amplitude symbols on the Grassmann manifold and multiplying them by random variables, we generate signals that follow an arbitrary probability distribution, such as Gaussian or skew-normal distributions. The mathematical property of the manifold enables the transmitter's random variables to remain unshared with the receiver, and the elimination of pilot symbols that could compromise covertness. The proposed scheme achieved higher covertness and achievable rates compared to conventional coherent Gaussian signaling schemes, without any penalty in terms of complexity.
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