The past few years have witnessed the great potential of exploiting channel state information (CSI) retrieved from commodity WiFi devices for contactless human sensing. However, a severe problem hindering practical WiFi sensing applications is that the obtained CSI data contains a large amount of noise, leading to short sensing range and low sensing accuracy. Aiming at solving the critical problem, in this article, we propose to employ a new base signal called CSI ratio to boost the WiFi sensing performance.

中文翻译：

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通过CSI比率提升WiFi感应性能

在过去的几年中，目睹了利用从商用WiFi设备获取的信道状态信息（CSI）进行非接触式人类感知的巨大潜力。然而，阻碍实际WiFi感测应用的严重问题是所获取的CSI数据包含大量噪声，导致感测范围短，感测精度低。为了解决这一关键问题，在本文中，我们建议采用一种称为CSI比的新基础信号来提高WiFi感应性能。