D. Halperin, W. Hu, A. Sheth, and D. Wetherall. "Tool Release: Gathering 802.11n Traces with Channel State Information." ACM SIGCOMM CCR, 2011.
For years, accessing CSI required SDR platforms, which are costly and require complex configuration. The Intel CSI Tool (5300/5350 NICs) was the first widely adopted solution for consumer hardware, but the hardware became outdated. The , developed by the University of Washington (initially by Xie et al.), emerged as a modern successor, supporting newer Wi-Fi standards (802.11n/ac) and leveraging the ubiquity of Atheros chipsets found in modern laptops and embedded systems. atheros csi tool
The Atheros CSI Tool is an open-source framework that extracts from commercial Wi-Fi devices equipped with Atheros AR93xx, AR95xx, or QCA988x chipsets. Unlike standard RSSI (Received Signal Strength Indicator), CSI provides fine-grained, per-subcarrier amplitude and phase information for each OFDM (Orthogonal Frequency-Division Multiplexing) subcarrier across multiple transmit-receive antenna pairs. Sheth, and D