Position Estimation via Ultra-Wide-Band Signals

Gezici, Sinan; Poor, H. Vincent

doi:10.1109/jproc.2008.2008840

Cited by 298 publications

(200 citation statements)

References 111 publications

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“…Currently, there are a large number of research papers dealing with indoor transmitter localization mostly utilizing ultra-wideband (UWB) radio frequency signal -summarized here [2]. The system we have developed, uses wideband OFDM signal for accurate measurement of the signals arrival times sent by a transmitter and detected by several receiver stations placed outside the monitored area [1].…”

Section: Introductionmentioning

confidence: 99%

Pseudorange error analysis for precise indoor positioning system

Pola

Bezoušek

2017

Journal of Electrical Engineering

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There is a currently developed system of a transmitter indoor localization intended for fire fighters or members of rescue corps. In this system the transmitter of an ultra-wideband orthogonal frequency-division multiplexing signal position is determined by the time difference of arrival method. The position measurement accuracy highly depends on the directpath signal time of arrival estimation accuracy which is degraded by severe multipath in complicated environments such as buildings. The aim of this article is to assess errors in the direct-path signal time of arrival determination caused by multipath signal propagation and noise. Two methods of the direct-path signal time of arrival estimation are compared here: the cross correlation method and the spectral estimation method.

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Section: Introductionmentioning

confidence: 99%

Pseudorange error analysis for precise indoor positioning system

Pola

Bezoušek

2017

Journal of Electrical Engineering

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“…UWB teknolojisini kullanan radyo alıcı vericileri, yüksek bant genişliği ile çoklu yol parazitlerin etkisini azaltarak veriyi daha küçük hata ve yüksek hızlarda iletebilmektedirler. Böylelikle kapalı alanlarda cihazlar arasında güvenli bir kablosuz haberleşme ortamı oluşmaktadır [5].…”

Section: Gi̇ri̇ş (Introduction)unclassified

“…Bununla birlikte GPS için kullanılan GDOP metriğinin kapalı alanlarda da kullanılarak konum belirleme yapılmasına yönelik çalışmalar da mevcuttur [15], [16]. Kapalı alanlarda bu konum belirleme sistemleri için optimizasyon ve istatistiksel yaklaşım teknikleri de çalışılmaktadır [5]. Bu teknikler gürültülü ölçümlerin kullanıldığı parametreler ile elde edilen fazla sayıdaki pozisyon bilgisi ile konum tahmini için teorik çözümler ortaya koyabilmektedirler.…”

Section: Gi̇ri̇ş (Introduction)unclassified

Geniş Bant Konum Belirleme Sistemi Performans Analizi ve İyileştirilmesi

Küçük¹

2017

SAÜ Fen Bilimleri Enstitüsü Dergisi

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ÖZGeniş bant spektrumu ve yüksek çözünürlük özellikleri ile çok geniş bant (Ultra-Wide Band, UWB) teknolojisi, birçok kapalı alan konum belirleme probleminde tercih edilmektedir. Bu çalışmada; UWB kablosuz sinyallerini kullanan konum belirleme sisteminin konum belirleme performansının belirlenmesi ve genellikle açık alan konum belirlemesinde kullanılan yatay hassaslık ölçeğinin (Horizontal Dilution Precision, HDOP) kapalı alanda bu sistem için kullanılmasıyla, konum tahmin hatasının iyileştirilmesi için yeni bir yöntem sunulmaktadır. Bu yöntem kullanışsız olan konum tahmin noktalarının elenmesi temel almaktadır ve UWB konum belirleme sistemi ile elde edilen deneysel konum belirleme sonuçlarının iyileştirilmesini sağlamaktadır. Bu yöntemin performans analizi için UWB sisteminin sağladığı konum verilerine literatürde kullanılan en küçük kareler (Least Squares, LS) ve doğrusal olmayan regresyon (Non-Linear Regression, NLR) ve önerilen HDOP tekniklerinin uygulanması ile elde edilen sonuçlar karşılaştırılmalı olarak sunulmaktadır. Sonuçlar göstermektedir ki; önerilen HDOP tekniği, LS algoritmasının ortalama konum hatasına göre yaklaşık olarak %9 oranında, NLR algoritmasına göre ise %5 oranında daha iyi sonuç vermektedir. Anahtar Kelimeler: Çok geniş bant, Bina içi konum belirleme, Yatay hassaslık ölçeğiPerformance analysis and improvement of the ultra-wide band localization system ABSTRACT With the very wide spectrum and high resolution characteristics, ultra-wideband (UWB) communication technique is chosen various indoor localization. This paper presents the localization performance of a positioning system, which uses UWB wireless signals, and a novel method to decrease the localization error using horizontal dilution of precision (HDOP), which uses for outdoor positioning in the literature, for this system. This method focuses to eliminate the unadaptable localization points and provides elimination of UWB experimental localization results. The comparison between the proposed method localizations and the results by elimination of UWB system raw localization data with the least-squares (LS) and the non-linear regression (NLR) techniques are provided for the performance analysis. As the results, the proposed HDOP technique approximately provides 9% the better performance than the LS algorithm. In addition, the technique also provides 5% the better performance than the NLR algorithm.

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“…Up to now, a large number of systems have been proposed to achieve the indoor positioning [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. The systems based on the propagation modeling are susceptible to the environmental change and the interference from other networks [21].…”

Section: Introductionmentioning

confidence: 99%

WIPP: Wi-Fi Compass for Indoor Passive Positioning with Decimeter Accuracy

et al. 2016

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Abstract:In recent decades, the proliferation of smart phones, tablets, and wireless networks has fostered a growing interest in indoor passive positioning. The Wi-Fi-based passive positioning systems can provide Location-Based Services (LBSs) to the third party such as market and security departments. Most of the existing systems are based on the Receive Signal Strength Indication (RSSI) information, which are generally time-consuming and susceptible to environmental change. To overcome this problem, we propose the Wi-Fi compass for indoor passive positioning system (WIPP), an Angle of Arrival (AOA) based passive positioning system using the existing commodity Wi-Fi network. In this paper, we first propose a new algorithm for the joint estimation of AOA and Time of Arrival (TOA) measurements based on the fine-grained Channel State Information (CSI), which is collected by an off-the-shelf Wi-Fi device equipped with only three antennas. Second, we use the affinity propagation clustering algorithm to identify the direct signal path from the target to each Wi-Fi Access Point (AP). Finally, we deploy the WIPP in an actual indoor environment to conduct the performance comparison with the well-known radio-frequency (RF) based system for locating and tracking users inside buildings (RADAR), as well as the conventional passive positioning system using the AOA solely. The experimental results show that the WIPP is able to achieve the median positioning error 0.7 m, which is much lower than the ones by the RADAR system and the conventional system using the AOA solely.

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Position Estimation via Ultra-Wide-Band Signals

Cited by 298 publications

References 111 publications

Pseudorange error analysis for precise indoor positioning system

Pseudorange error analysis for precise indoor positioning system

Geniş Bant Konum Belirleme Sistemi Performans Analizi ve İyileştirilmesi

WIPP: Wi-Fi Compass for Indoor Passive Positioning with Decimeter Accuracy

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