System Concept of WIFI Based Passive Radar
01 Dec 2011-International Journal of Electronics and Telecommunications (Walter de Gruyter GmbH)-Vol. 57, Iss: 4, pp 447-450
TL;DR: In this paper idea of passive radar system based on popular wireless networks commonly named WIFI is presented and it is assumed, that all transmitters operate on the same band frequency and the passive radar receiver has to couple each transmission burst with transmitter position by decoding the physical address of transmitter from captured data stream.
Abstract: In this paper idea of passive radar system based on popular wireless networks commonly named WIFI is presented. In such an networks many transmitters operates in the same channel using multiple access. Wireless networks operating on frequencies 2.4GHz and 5GHz are very common today (IEEE 802.11 a/b/g/n). Classic passive radar determines bistatic distance and velocity by using cross-ambiguity function. To seek target position in XYZ space at least illumination of 3 different transmitters is required. In that paper it was assumed, that all transmitters operate on the same band frequency and the passive radar receiver has to couple each transmission burst with transmitter position by decoding the physical address of transmitter from captured data stream. Having most of the signal sources in our passive radar environment it is possible to detect and to localize objects of interest.
Citations
More filters
Journal Article•
TL;DR: The algorithms and the results of the experiment for the multistatic passive radar based on the WIFI signal, which detected a Cessna C208 airplane based on low power signal from WifI network nodes, which were acting as non-cooperative illuminators of opportunity.
Abstract: This paper presents the theory and experimental result of passive radar using WIFI transmitters as illuminators of opportunity. As a result of experiments conducted on 17th August 2013 at airfield Chrcynno a Cessna C208 airplane was detected using multistatic passive radar system based on low power signal from WIFI network nodes, which were acting as non-cooperative illuminators of opportunity. In the experiment the 3 wireless access points (AP) were communicating with each other and illuminating the radar scene (airfield). The direct reference and reflected (surveillance) signals have been acquired and processed using specially developed algorithm presented in the paper. After signal processing using Passive Coherent Location methods the target has been detected. This paper describes in details the algorithms and the results of the experiment for the multistatic passive radar based on the WIFI signal.
6 citations
Cites background from "System Concept of WIFI Based Passiv..."
...Keywords Passive radar systems, passive coherent location, passive bistatic radar, multistatic passive radio location, noise radars, WIFI signal decoding, frame detection, processing signal from wireless networks....
[...]
Proceedings Article•
01 Jan 2009
TL;DR: This paper addresses the real-time localization of transceiver-free targets is addressed by means of learning by example methodology that exploits the received signal strength indicator available at the nodes of a wireless sensor network as input data.
Abstract: The increasing demand in homeland security speeds up the development of innovative and non-invasive systems to localize and track moving objects in complex environments. In this paper the real-time localization of transceiver-free targets is addressed by means of learning by example methodology that exploits the received signal strength indicator available at the nodes of a wireless sensor network as input data. This approach uses neither dedicated sensors nor active devices put on the target to localize both idle and moving objects. The definition of a customized classifier during an offline training procedure enables the real-time generation of a probability map of presence by processing the output of the support vector machine. Some selected experimental results validate the effectiveness of the proposed methodology applied in real scenarios.
4 citations
Dissertation•
20 Dec 2018
2 citations
Cites background from "System Concept of WIFI Based Passiv..."
...There are radars that only listen and analyze what is around them using signals emitted by other systems, named as passive radars [18]....
[...]
Proceedings Article•
06 Jul 2015TL;DR: This paper proposes to use a filter with sequential update, where the object state is updated with a single measurement of bistatic range whenever it is available, and presents results of an experiment with live data, where an object was localized with use of an experimental Wi-Fi based passive radar (WiFiRAD).
Abstract: A Wi-Fi based passive radar can be used for localization of objects in the vicinity of several access points, which are used as illumination sources. However, the transmission of Wi-Fi signal is not continuous — the activity of access points depends on the transmitted data and is totally unpredictable from the passive radar point of view. As a result, the ability to detect and measure an object using a given transmitter illumination changes at random. Thus, it is not possible to use a traditional Kalman filter with update of full Cartesian measurement. Instead we propose to use a filter with sequential update, where the object state is updated with a single measurement of bistatic range whenever it is available. The paper presents results of an experiment with live data, where an object was localized with use of an experimental Wi-Fi based passive radar (WiFiRAD) constructed at Warsaw University of Technology.
Cites background from "System Concept of WIFI Based Passiv..."
...When Wi-Fi node transmission is used for illumination of the scene, the packetbased nature of the signal and multiple access features of the network become an important problem [6]....
[...]
References
More filters
Proceedings Article•
01 Jan 2009
TL;DR: This paper addresses the real-time localization of transceiver-free targets is addressed by means of learning by example methodology that exploits the received signal strength indicator available at the nodes of a wireless sensor network as input data.
Abstract: The increasing demand in homeland security speeds up the development of innovative and non-invasive systems to localize and track moving objects in complex environments. In this paper the real-time localization of transceiver-free targets is addressed by means of learning by example methodology that exploits the received signal strength indicator available at the nodes of a wireless sensor network as input data. This approach uses neither dedicated sensors nor active devices put on the target to localize both idle and moving objects. The definition of a customized classifier during an offline training procedure enables the real-time generation of a probability map of presence by processing the output of the support vector machine. Some selected experimental results validate the effectiveness of the proposed methodology applied in real scenarios.
4 citations
"System Concept of WIFI Based Passiv..." refers methods in this paper
...The indoor applications are also possible, but they should rely mostly on Doppler processing and power budget analysis and were presented by Viani, Olivieri, Massa [2]....
[...]