Enabling WiFi Sensing on New-generation WiFi Cards

IF 3.6 Q2 COMPUTER SCIENCE, INFORMATION SYSTEMS Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies Pub Date : 2024-01-12 DOI:10.1145/3633807
E. Yi, Fusang Zhang, Jie Xiong, Kai Niu, Zhiyun Yao, Daqing Zhang
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Abstract

The last few years have witnessed the rapid development of WiFi sensing with a large spectrum of applications enabled. However, existing works mainly leverage the obsolete 802.11n WiFi cards (i.e., Intel 5300 and Atheros AR9k series cards) for sensing. On the other hand, the mainstream WiFi protocols currently in use are 802.11ac/ax and commodity WiFi products on the market are equipped with new-generation WiFi chips such as Broadcom BCM43794 and Qualcomm QCN5054. After conducting some benchmark experiments, we find that WiFi sensing has problems working on these new cards. The new communication features (e.g., MU-MIMO) designed to facilitate data transmissions negatively impact WiFi sensing. Conventional CSI base signals such as CSI amplitude and/or CSI phase difference between antennas which worked well on Intel 5300 802.11n WiFi card may fail on new cards. In this paper, we propose delicate signal processing schemes to make wireless sensing work well on these new WiFi cards. We employ two typical sensing applications, i.e., human respiration monitoring and human trajectory tracking to demonstrate the effectiveness of the proposed schemes. We believe it is critical to ensure WiFi sensing compatible with the latest WiFi protocols and this work moves one important step towards real-life adoption of WiFi sensing.
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在新一代 WiFi 卡上启用 WiFi 传感功能
过去几年来,WiFi 传感技术发展迅速,应用范围广泛。然而,现有作品主要利用过时的 802.11n WiFi 卡(即英特尔 5300 和创锐讯 AR9k 系列卡)进行传感。另一方面,目前使用的主流 WiFi 协议是 802.11ac/ax,而市场上的商品 WiFi 产品都配备了新一代 WiFi 芯片,如 Broadcom BCM43794 和 Qualcomm QCN5054。在进行了一些基准实验后,我们发现 WiFi 传感在这些新卡上的工作存在问题。为促进数据传输而设计的新通信功能(如 MU-MIMO)对 WiFi 传感产生了负面影响。在英特尔 5300 802.11n WiFi 卡上运行良好的传统 CSI 基本信号(如 CSI 幅值和/或天线间 CSI 相位差)在新卡上可能会失效。在本文中,我们提出了精细的信号处理方案,以使无线传感在这些新的 WiFi 卡上运行良好。我们采用了两个典型的传感应用,即人体呼吸监测和人体轨迹跟踪,来证明所提方案的有效性。我们认为,确保 WiFi 传感与最新的 WiFi 协议兼容至关重要,这项工作向 WiFi 传感在现实生活中的应用迈出了重要一步。
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来源期刊
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies
Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies Computer Science-Computer Networks and Communications
CiteScore
9.10
自引率
0.00%
发文量
154
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