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Proceedings ArticleDOI

Augmenting OFDM wireless local networks with motion detection capability

Christian Brauers, +2 more
- pp 253-257
TLDR
This paper presents a procedure with uses channel state information of an IEEE 802.11 High Throughput wireless link to reliably detect the presence of moving items, such as people crossing a room.
Abstract: 
Ubiquitous wireless local networks which use channel transfer function estimation to compensate for echoes on the wireless channel are uniquely suited for motion detection as a secondary use. In this way, added value can be provided without additional hardware. This paper presents a procedure with uses channel state information of an IEEE 802.11 High Throughput wireless link to reliably detect the presence of moving items, such as people crossing a room. By leveraging CSI instead of RSSI, the frequency-selective fading characteristic of indoor wireless channels can be taken into account while eliminating the effect of power level fluctuations in consumer-grade wireless hardware.

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Citations
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Proceedings ArticleDOI

A CSI Frequency Domain Fingerprint-Based Method for Passive Indoor Human Detection

Qingqing Tan, +4 more
TL;DR: A passive indoor personnel detection method based on Wi-Fi called FDF-PIHD (Frequency Domain Fingerprint-based Passive Indoor Human Detection), which can not only detect whether there is a target indoor, but also determine the current state of the target.
Patent

Eliciting MIMO transmissions from wireless communication devices

Christopher Beg
TL;DR: In this paper, a first wireless communication device may be configured to generate network or transport layer messages addressed to a second wireless communication devices in a wireless communication network, and wirelessly transmit the messages to the second wireless device to elicit MIMO transmissions from the first wireless device.
Patent

Using MIMO training fields for motion detection

Christopher Beg, +1 more
TL;DR: In this article, a first-time-domain channel estimate and a second-time domain channel estimate are generated for each wireless signal transmitted between wireless communication devices in a wireless communication network and a determination is made whether motion has occurred in a space during the time period based on the first time-domain estimates, and a location of the motion within the space is determined based on second timedomain channel estimates.
References
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Journal ArticleDOI

Tool release: gathering 802.11n traces with channel state information

Daniel Halperin, +3 more
TL;DR: 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.
Book

Pattern classification

Jürgen Schürmann
Proceedings ArticleDOI

Multiband multistatic Passive Radar system for airspace surveillance: A step towards mature PCL implementations

Michael Edrich, +1 more
TL;DR: The design, implementation and performance evaluation of a multi-band, multi-illuminator Passive Radar system with cross-band data fusion capability is described and the evaluation of various measurement campaigns with this system are summarized.
Proceedings ArticleDOI

Passive WLAN radar network using compressed sensing

Matthias Weiß
TL;DR: This paper proposes a homogeneous sensor network composed of several distributed Wireless Local Area Networks (WLAN) routers as transmitters and dedicated receivers for detecting multiple targets and estimating their location and velocity with high accuracy.
Proceedings ArticleDOI

Indoor localization by a novel probabilistic approach

Shih-Hau Fang, +2 more
TL;DR: A novel localzation algorithm called transformation based probabilistic approach for building a robust and compact localization system that offers a more efficient mechanism to utilize information of all APs and overcomes the drawback of traditional AP selection techniques.