Tool: Atheros Csi

A common question is whether this works with modern 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6) cards. The original Atheros CSI Tool is largely bound to the 802.11n standard. While newer tools exist (like the Nexmon tool for Broadcom chips), the Atheros tool remains a staple because of its robust documentation and established place in academic literature.

git clone https://github.com/xieyaxiongfly/Atheros-CSI-Tool-UserSpace-APP.git atheros csi tool

Navigate to your Linux source ( /usr/src/linux ). Apply the CSI patch against the ath9k driver. A common question is whether this works with modern 802

Apply provided patches to compat-wireless or direct kernel source. Rebuild ath9k module. understand its constraints.

: It supports up to 114 subcarriers for a pair of antennas when running on a 40MHz bandwidth.

No tool is perfect. Before committing to the Atheros CSI Tool, understand its constraints.