AX-CSI is an open-source hardware and software tool designed to extract Channel State Information (CSI) from commercial Wi-Fi 6 (IEEE 802.11ax) network interface cards, enabling researchers to capture fine-grained wireless channel measurements that reflect environmental changes such as human movement. It matters for the field because it provides a standardized, accessible platform for CSI-based sensing research on next-generation Wi-Fi infrastructure, facilitating reproducibility and comparability across studies by offering a common data collection baseline. Key variants relate to the underlying 802.11ax PHY features it exposes, including support for wider bandwidths, higher subcarrier counts, and multi-antenna (MIMO) configurations, which distinguish it from older CSI tools developed for 802.11n or 802.11ac hardware such as the Intel 5300 NIC-based Linux 802.11n CSI Tool.
Source Papers
- A survey on CSI-based Wi-Fi sensing datasets and models with a focus on reproducibility ↗ — A survey on CSI-based Wi-Fi sensing datasets and models with
- Exposing the CSI: A Systematic Investigation of CSI-based Wi-Fi Sensing Capabilities and Limitations ↗ — Exposing the CSI: A Systematic Investigation of CSI-based Wi