SIAM Journal on Applied Mathematics, Volume 81, Issue 3, Page 814-833, January 2021.
Motivated by applications to wireless communications, this paper addresses the propagation of waves transmitted by ambient noise sources and interacting with metamaterials. We discuss a generalized Helmholtz--Kirchhoff identity that is valid in dispersive media and characterize the statistical properties of the empirical cross spectral density of the wave field. We can then introduce and analyze an original communication scheme between two passive arrays that uses only ambient noise illumination. The passive transmitter array does not transmit anything, but it is a tunable metamaterial surface that can modulate its dispersive properties and encode a message in the modulation. The passive receiver array made of two receivers that are half a wavelength apart from each other can decode the message from the empirical cross spectral density of the wave field.

中文翻译：

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具有环境噪声的无源通信

SIAM应用数学杂志，第81卷，第3期，第814-833页，2021年1月。
受无线通信应用的启发，本文讨论了环境噪声源传输的波的传播以及与超材料的相互作用。我们讨论了在色散介质中有效的广义Helmholtz-Kirchhoff恒等式，并描述了波场经验交叉谱密度的统计特性。然后，我们可以介绍和分析两个仅使用环境噪声照明的无源阵列之间的原始通信方案。无源发射器阵列不发射任何东西，但是它是可调谐的超材料表面，可以调制其色散特性并在调制中编码消息。