用普通笔记本网卡实现厘米级实时雷达，还能边联网边感知
LiveSense: A Real-Time Wi-Fi Sensing Platform for Range-Doppler on COTS Laptop
- 通过同步提取信道状态信息，实现高帧率实时感知
- 在设备端完成相位对齐与自干扰消除，支持连续通信
- 可检测距离、速度、呼吸和手势，适合智能家居场景
我们提出 LiveSense——一个跨平台系统，将笔记本电脑上的商用无线网卡（如 Intel AX211 或 BE201）转变为厘米级精度的实时距离-多普勒传感器，同时保持网络连接能力。该系统可在 >=40 Hz 的频率下提取完全同步的信道状态信息（CSI），在设备端完成时间相位对齐与自干扰抑制，并向 Python/Qt 图形界面实时输出目标距离、多普勒速度、子载波幅相信息及标注视频帧。演示展示其能精准探测数米内人员的距离与径向速度、微运动（如呼吸）以及手势距离。据我们所知，这是首个在受限 160 MHz 带宽下实现商用 Wi-Fi 精确测距的演示。
原文摘要 · Abstract (English)
We present LiveSense - a cross-platform that transforms a commercial off-the-shelf (COTS) Wi-Fi Network Interface Card (NIC) on a laptop into a centimeter-level Range-Doppler sensor while preserving simultaneous communication capability. The laptops are equipped with COTS Intel AX211 (Wi-Fi 6E) or Intel BE201 (Wi-Fi 7) NICs. LiveSense can (i) Extract fully-synchronized channel state information (CSI) at >= 40 Hz, (ii) Perform time-phase alignment and self-interference cancellation on-device, and (iii) Provide a real-time stream of range, Doppler, subcarrier magnitude/phase and annotated video frames to a Python/Qt Graphical User Interface (GUI). The demo will showcase the ability to detect (i) Distance and radial velocity of attendees within a few meters of the device, (ii) Micro-motion (respiration), and (iii) Hand-gesture ranging. To the best of our knowledge, this is the first-ever demo to obtain accurate range information of targets from commercial Wi-Fi, despite the limited 160 MHz bandwidth.
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