Journal ArticleDOI
Tool release: gathering 802.11n traces with channel state information
Daniel Halperin,Wenjun Hu,Anmol Sheth,David Wetherall +3 more
- Vol. 41, Iss: 1, pp 53-53
TLDR
The measurement setup comprises the customized versions of Intel's close-source firmware and open-source iwlwifi wireless driver, userspace tools to enable these measurements, access point functionality for controlling both ends of the link, and Matlab scripts for data analysis.Abstract:
We are pleased to announce the release of a tool that records detailed measurements of the wireless channel along with received 802.11 packet traces. It runs on a commodity 802.11n NIC, and records Channel State Information (CSI) based on the 802.11 standard. Unlike Receive Signal Strength Indicator (RSSI) values, which merely capture the total power received at the listener, the CSI contains information about the channel between sender and receiver at the level of individual data subcarriers, for each pair of transmit and receive antennas.Our toolkit uses the Intel WiFi Link 5300 wireless NIC with 3 antennas. It works on up-to-date Linux operating systems: in our testbed we use Ubuntu 10.04 LTS with the 2.6.36 kernel. The measurement setup comprises our customized versions of Intel's close-source firmware and open-source iwlwifi wireless driver, userspace tools to enable these measurements, access point functionality for controlling both ends of the link, and Matlab (or Octave) scripts for data analysis. We are releasing the binary of the modified firmware, and the source code to all the other components.read more
Citations
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Proceedings ArticleDOI
RSS-eye: Human-assisted indoor localization without radio maps
Pierluigi Gallo,Stefano Mangione +1 more
TL;DR: A novel methodology to perform indoor positioning of mobile users by the estimation of angles of arrival from access points whose locations are known, which shows good accuracy in terms of angle of arrival estimation and promising results on localization.
Proceedings ArticleDOI
FuseLoc: A CCA Based Information Fusion for Indoor Localization Using CSI Phase and Amplitude of Wifi Signals
Tahsina Farah Sanam,Hana Godrich +1 more
TL;DR: FuseLoc is proposed, the first information fusion based indoor localization using multiple features extracted from Channel State Information (CSI) to find the best match to localize a subject.
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WS-WiFi: Wired Synchronization for CSI Extraction on COTS-WiFi-Transceivers
Simon Tewes,Aydin Sezgin +1 more
TL;DR: This article is the first to investigate the temperature-dependent behavior of the CSI phase across multiple devices, and shows that with only a single received packet and minor hardware adjustments, it is able to obtain the AoA of a WiFi transmitter with a mean absolute error.
Journal ArticleDOI
Fine-grained occupant activity monitoring with Wi-Fi channel state information: Practical implementation of multiple receiver settings
TL;DR: Wi-Sensing is proposed to recognize occupant’s activities of daily living in a non-intrusive way by exploiting commercial off-the-shelf Wi-Fi devices and provides over 96% classification accuracy in two different indoor environments.
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Continuous User Authentication by Contactless Wireless Sensing
TL;DR: BodyPIN as discussed by the authors is a continuous user authentication system by contactless wireless sensing using commodity Wi-Fi, which can track the current user's legal identity throughout a computer system's execution, in case the authentication fails, the consequent accesses will be denied to protect the system.
References
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