论文标题
一种自适应的RI，估计和塑造褪色丰富的无线通道
A self-adaptive RIS that estimates and shapes fading rich-scattering wireless channels
论文作者
论文摘要
我们提出了一个框架，用于在褪色的无线环境中操作自适应的RIS。我们将丰富的无线通道建模为通过（i）RIS和（ii）动态perturbers（移动对象等）进行双重构图。首先，在每个相干时间内，自适应RIS估计了基于辅助无线通道的测量结果，估计动态遗物（例如，Perturbers的方向和位置）的状态。然后，第二，使用从RIS配置和Perturber状态到无线通道的映射的替代前向模型，获得了优化的RIS配置来实现所需的功能。我们使用基于物理学的端到端模型的RIS参数通信与可调式褪色（Physfad）的示例，以最大化接收的信号强度指标的目的，证明了我们的技术。我们的结果介绍了RIS授权本地化的融合的途径，并通过RIS授权的通道塑造自由空间中的简单操作案例，而不会褪色。
We present a framework for operating a self-adaptive RIS inside a fading rich-scattering wireless environment. We model the rich-scattering wireless channel as being double-parametrized by (i) the RIS, and (ii) dynamic perturbers (moving objects, etc.). Within each coherence time, first, the self-adaptive RIS estimates the status of the dynamic perturbers (e.g., the perturbers' orientations and locations) based on measurements with an auxiliary wireless channel. Then, second, using a learned surrogate forward model of the mapping from RIS configuration and perturber status to wireless channel, an optimized RIS configuration to achieve a desired functionality is obtained. We demonstrate our technique using a physics-based end-to-end model of RIS-parametrized communication with adjustable fading (PhysFad) for the example objective of maximizing the received signal strength indicator. Our results present a route toward convergence of RIS-empowered localization and sensing with RIS-empowered channel shaping beyond the simple case of operation in free space without fading.
