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
Reads0
Chats0
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
More filters
Journal ArticleDOI
WiAdv: Practical and Robust Adversarial Attack against WiFi-based Gesture Recognition System
TL;DR: The attack case study and analysis reveal the vulnerability of WiFi-based gesture recognition systems, and it is hoped WiAdv could help promote the improvement of the relevant systems.
Journal ArticleDOI
Time-Frequency Characteristics of In-Home Radio Channels Influenced by Activities of the Home Occupant.
TL;DR: An indoor radio channel measurement campaign at 5.9 GHz is conducted to study the impact of fall incidents and some daily life activities on the temporal and spectral properties of the indoor channel under both line-of-sight (LOS) and obstructed-LOS (OLOS) propagation conditions.
Posted Content
Adversarial WiFi Sensing using a Single Smartphone
TL;DR: This paper identifies a passive adversarial sensing attack, where bad actors using a single smartphone can silently localize and track individuals in their home or office from outside walls, by just listening to ambient WiFi signals.
Proceedings ArticleDOI
Deep Learning Based Encryption Policy Intrusion Detection Using Commodity WiFi
TL;DR: EPID, a scheme for Encryption Policy Intrusion Detection leveraging Channel State Information (CSI), applies Butterworth low-pass filter for signal denoising, and conjugate calibration to remove CSI random phase offsets to augment dataset.
Journal ArticleDOI
Wi-Fi-Based Location-Independent Human Activity Recognition with Attention Mechanism Enhanced Method
TL;DR: A Channel–Time–Subcarrier Attention Mechanism (CTS-AM) enhanced few-shot learning method that fulfills the feature representation and recognition tasks and the generalization capability of the model is significantly improved.
References
More filters
Proceedings ArticleDOI
Predictable 802.11 packet delivery from wireless channel measurements
TL;DR: It is shown that, for the first time, wireless packet delivery can be accurately predicted for commodity 802.11 NICs from only the channel measurements that they provide, and the rate prediction is as good as the best rate adaptation algorithms for 802.
Journal ArticleDOI
ACM SIGCOMM computer communication review
TL;DR: The Internet is going mobile and wireless, perhaps quite soon, with a number of diverse technologies leading the charge, including, 3G cellular networks based on CDMA technology, a wide variety of what is deemed 2.5G cellular technologies (e.g., EDGE, GPRS and HDR), and IEEE 802.11 wireless local area networks (WLANs).
Journal ArticleDOI
802.11 with multiple antennas for dummies
TL;DR: This tutorial provides a brief introduction to multiple antenna techniques, and describes the two main classes of those techniques, spatial diversity and spatial multiplexing.