Demo: WiPiCap: Real-time IEEE 802.11ac/ax Compressed Beamforming Report Decoding System

Wi-Fi channel state information (CSI)-based sensing faces challenges in adapting to real-world scenarios due to technical constraints that hinder CSI acquisition. Compressed beamforming report (CBR), standard-compliant channel information in IEEE 802.11ac/ax, is being investigated as an alternative, device-agnostic information source for sensing. In this paper, we implement WiPiCap, a real-time CBR decoding system that is lightweight, easy to deploy, and supports arbitrary antenna, frequency, and bandwidth configurations. In the evaluation, we show that the motion of surrounding objects is reflected in a live plot of CBR data in real time.