Terrestrial Localization by Using Angle of Arrival Measurements in Wireless Sensor Network

Tondwalkar, Ankita; Vinayakray-Jani, Preetida

doi:10.1109/cicn.2015.44

Cited by 5 publications

(5 citation statements)

References 18 publications

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“…The directional antenna is rotating at a fixed speed while transmitting. The zero bearing can then be obtained by solving the system of equations, or a signal can be transmitted by an omnidirectional antenna when the antenna is pointing to a reference bearing [32]. The UAV wishing to obtain the bearing would listen to this omnidirectional beacon.…”

Section: A Direction Of Arrival Methodsmentioning

confidence: 99%

Keeping UAVs Under Control During GPS Jamming

Bergh

Pollin

2019

IEEE Systems Journal

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Unmanned aerial vehicles (UAV) are being more and more widely deployed. Although, initially most UAVs were controlled by a pilot, autonomy has increased. This requires the flight controller in the UAV to accurately know the current system state. Knowing the current position is of crucial importance. Fortunately, this can be reliably obtained from a global navigation satellite system (GNSS) receiver. Recently, it was shown that criminal GNSS jamming frequently occurs. First, this paper analyzes the risk posed by off-the-shelf civilian GPS jammers to UAVs. Then, as the main contribution of this paper, a countermeasure is described and implemented using custom hardware and software that allows the control radio to be used as a backup navigation source. Finally, the proposed solution is tested in ideal and field conditions. It is shown that good performance can be obtained by the presented system, almost without additional system cost.

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Section: A Direction Of Arrival Methodsmentioning

confidence: 99%

Keeping UAVs Under Control During GPS Jamming

Bergh

Pollin

2019

IEEE Systems Journal

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“…The accuracy of determining the location of the emission's source can be described through various characteristics, amongst which a common feature is a fact that the accuracy is described on the plane by an elliptical or a circular error [30][31][32]. These errors should cover this calculated emitter location with a definite probability [14,15,[33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Metrology and Measurement Systems

Matuszewski

Kraszewski

2021

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The determination of precise emitter location is a very important task in electronic intelligence systems. Its basic requirements include the detection of the emission of electromagnetic sources (emitters), measurement of signal parameters, determining the direction of emitters, signal analysis, and the recognition and identification of their sources. The article presents a new approach and algorithm for calculating the location of electromagnetic emission sources (radars) in a plane based on the bearings in the radio-electronic reconnaissance system. The main assumptions of this method are presented and described i.e. how the final mathematical formulas for calculating the emitter location were determined for any number of direction finders (DFs). As there is an unknown distance from the emitter to the DFs then in the final formulas it is stated how this distance should be calculated in the first iteration. Numerical simulation in MATLAB showed a quick convergence of the proposed algorithm to the fixed value in the fourth/fifth iteration with an accuracy less than 0.1 meter. The computed emitter location converges to the fixed value regardless of the choice of the starting point. It has also been shown that to precisely calculate the emitter position, at least a dozen or so bearings from each DFs should be measured. The obtained simulation results show that the precise emitter location depends on the number of DFs, the distances between the localized emitter and DFs, their mutual deployment, and bearing errors. The research results presented in the article show the usefulness of the tested method for the location of objects in a specific area of interest. The results of simulation calculations can be directly used in radio-electronic reconnaissance systems to select the place of DFs deployment to reduce the emitter location errors in the entire reconnaissance area.

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“…Tondwalkar ve arkadaşları, algılayıcı düğümlerin hareketli ve sabit olduğu algılayıcı ağlar aracılığıyla lokalizasyon hizmeti tasarlamayı amaçlamışlardır [21]. Kablosuz algılayıcı ağ uygulamalarının çoğunluğunun, algılayıcı düğümlerin esas fiziksel konumlarının güvenilir bilgisini gerektirdiğini vurgulamışlardır.…”

Section: Introductionunclassified

“…Pozisyon hesaplaması için üçgenleme yöntemini kullanmışlardır. Güvenilir konum bilgisi elde etmek için, hesaplanan pozisyonun aksine gerçek pozisyonun kök minimum ortalama kare hata analizi yönteminden faydalanmışlardır [21].…”

Section: Introductionunclassified

Energy efficient TDMA access technique for surveillance in terrestrial sensor networks

Bayrakdar¹

2019

Balıkesir Üniversitesi Fen Bilimleri Enstitüsü Dergisi

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ÖzetAlgılayıcı ağların uygulama alanlarından biri olan karasal algılayıcı ağlar, gözlemleme işlemleri için günümüzde yaygın olarak kullanılmaktadır. Kablosuz algılayıcı ağlar, belirli bir bölgenin sıcaklık, nem, basınç, hareket gibi karakteristiklerini incelemek amacıyla küçük bir gömülü cihaz üzerine yerleştirilmiş farklı algılayıcıların birleşimi olarak karşımıza çıkmaktadır. Sürekli olarak belirli bir bölgeyi izlemek için kablosuz algılayıcı ağın bu bölgelerin kesişme noktalarında yer alması gerekmektedir. Bu makalede, kablosuz algılayıcı ağına dayalı bir gözlemleme sistemi oluşturulmuştur. Kırsal bölgelerdeki belirli bir arazinin ne tür meyve -sebze yetiştiriciliğine uygun olduğunu tespit etmek amacıyla sıcaklık, nem, basınç, vb. değerlerin sezilmesi düşünülmüştür. Gözlemleme için kullanılan algılayıcı düğümler benzetim ortamında geliştirilmiştir. Kablosuz algılayıcı ağ düğümlerinin yapısı, donanımı ve iş akışı tasarlanmıştır. Tasarlanan sistemin enerji verimli olarak çalışması ve paket çarpışmalarının yaşanmaması için ortam erişim tekniği olarak TDMA protokolü seçilmiştir. Benzetim sonuçları, algılayıcı ağın ortam bilgilerini hızlı bir şekilde toplama ve veriyi gerçek zamanlı olarak işleme merkezine aktarma yeteneğine sahip olduğunu göstermektedir. Ayrıca, önerdiğimiz sistem karasal alandaki kablosuz algılayıcı ağların kullanışlılığını ortaya koymaktadır. Anahtar kelimeler: Algılayıcı ağ, ortam erişim, karasal. * Muhammed Enes BAYRAKDAR, muhammedbayrakdar@duzce.edu.tr, https://orcid.org/0000-0001-9446-0988 BAYRAKDAR M.E. AbstractThe terrestrial sensor networks, which are one of the application areas of sensor networks, are now widely used for monitoring and security operations. The wireless sensor networks are a combination of different sensors placed on a small embedded device to examine characteristics of a given region such as temperature, humidity, pressure, movement. The wireless sensor network must be located at the intersection points of these zones to continuously monitor a specific area. In this article, a monitoring system based on the wireless sensor network is created. The sensor nodes used for monitoring were developed in a simulation environment. The structure, hardware and workflow of wireless sensor network nodes are designed. TDMA protocol has been chosen as the medium access technique in order to ensure that the designed system operates in an energy-efficient manner and that packet collisions are not experienced. The simulation results show that the sensor network has the ability to quickly collect media information and transmit data to the processing center in real time. In addition, the system we proposed suggests the usefulness of wireless sensor networks in the terrestrial area.

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Terrestrial Localization by Using Angle of Arrival Measurements in Wireless Sensor Network

Cited by 5 publications

References 18 publications

Keeping UAVs Under Control During GPS Jamming

Keeping UAVs Under Control During GPS Jamming

Metrology and Measurement Systems

Energy efficient TDMA access technique for surveillance in terrestrial sensor networks

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