论文标题

使用可解释的神经网络智能表面的端到端无线路径部署

End-to-end Wireless Path Deployment with Intelligent Surfaces Using Interpretable Neural Networks

论文作者

Liaskos, Christos, Niez, Shuai, Tsioliaridou, Ageliki, Pitsillides, Andreas, Ioannidis, Sotiris, Akyildiz, Ian F.

论文摘要

智能表面对无线传播现象发挥确定性控制,从而在性能,安全性和无线功率传输方面具有新颖的能力。这样的表面以矩形瓷砖的形式出现,层层覆盖了墙壁,天花板或建筑物外墙等大型表面。每个瓷砖都是可寻址的,可以从控制器中接收软件命令,从而通过自定义其反射方向,焦点,极化和相位来操纵电磁波的撞击。关于将一组瓷砖编排用于服务端到端交流目标的一个新问题。为此,我们提出了一种基于可解释的神经网络的新型智能表面网络算法。瓷砖被映射到神经网络节点,任何瓷砖视线连接性均表示为神经网络链接。瓷砖波操纵功能是通过几何反射捕获的,几乎是可旋转的瓷砖表面标准,因此能够调谐分布在相应的神经网络链路上撞击瓷砖的功率,相应的功率部件用作链路权重。 FeedForward/Backpropagate过程优化了这些权重,以将理想的传播结果(归一化网络功率输出)与无线用户排放(归一化网络功率输入)匹配。解释过程将这些权重转化为相应的瓷砖波操作功能。

Intelligent surfaces exert deterministic control over the wireless propagation phenomenon, enabling novel capabilities in performance, security and wireless power transfer. Such surfaces come in the form of rectangular tiles that cascade to cover large surfaces such as walls, ceilings or building facades. Each tile is addressable and can receive software commands from a controller, manipulating an impinging electromagnetic wave upon it by customizing its reflection direction, focus, polarization and phase. A new problem arises concerning the orchestration of a set of tiles towards serving end-to-end communication objectives. Towards that end, we propose a novel intelligent surface networking algorithm based on interpretable neural networks. Tiles are mapped to neural network nodes and any tile line-of-sight connectivity is expressed as a neural network link. Tile wave manipulation functionalities are captured via geometric reflection with virtually rotatable tile surface norm, thus being able to tunable distribute power impinging upon a tile over the corresponding neural network links, with the corresponding power parts acting as the link weights. A feedforward/backpropagate process optimizes these weights to match ideal propagation outcomes (normalized network power outputs) to wireless user emissions (normalized network power inputs). An interpretation process translates these weights to the corresponding tile wave manipulation functionalities.

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