Prototyping Multi-Transceiver Free-Space Optical Communication Structures

Sevincer, Abdullah; Bilgi, Mehmet; Yüksel, Murat; Pala, Nezih

doi:10.1109/icc.2010.5501774

Cited by 16 publications

(8 citation statements)

References 57 publications

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“…Therefore, we first implemented a simple LOS detection and establishment protocol which uses a three-way handshaking routine in order to detect transceivers that are in line-of-sight of each other. [8] By this protocol we are able to send localization packets to the appropriate transceiver.…”

Section: Alignment and Localization Algorithmmentioning

confidence: 99%

“…A line transceiver which is responsible to convert TTL logic levels to RS232 is added to the controller board in order to establish communication with a laptop computer's serial port. We used the PIC24FJ128GA106 [20] for implementing an alignment algorithm [8] that automatically detects availability of line-of-sight alignment with neighbor nodes. The controller circuit shown in Fig.…”

Section: Controller Circuitmentioning

confidence: 99%

“…Previous studies revealed that FSO-only mobile ad hoc networks are viable and using auto-alignment circuitry and protocol, line-of-sight issues can be remedied significantly [5][6][7][8]. However, FSO communication technologies has not been used to solve the ad-hoc localization problem and they provide a substantial amount of potential as it is quite efficient to run triangulation algorithms using direction of reception (i.e., angle of arrival).…”

Section: Introductionmentioning

confidence: 97%

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Optical wireless localization

et al. 2011

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In this paper, we explore the possibility of using directionality of free-space-optical (a.k.a. optical wireless) communications for solving the 3-D localization problem in ad-hoc networking environments. Range-based localization methods either require a higher node density (i.e., at least three other localized neighbors must exist) than required for assuring connectedness or a high-accuracy power-intensive ranging device such as a sonar or laser range finder which exceeds the form factor and power capabilities of a typical ad-hoc node. Our approach exploits the readily available directionality information provided by a physical layer using optical wireless and uses a limited number of GPS-enabled nodes, requiring a very low node density (2-connectedness, independent of the dimension of space) and no ranging technique. We investigate the extent and accuracy of localization with respect to varying node designs (e.g., increased number of transceivers with better directionality) and density of GPS-enabled and ordinary nodes as well as messaging overhead per re-localization. Although denser deployments are desirable for higher accuracy, our method still works well with sparse networks with little message overhead and small number of anchor nodes (as little as 2). We also present a proof-of-concept prototype of our FSO-based localization techniques and show the validity of our approach even with three transceivers per node.

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Section: Alignment and Localization Algorithmmentioning

confidence: 99%

Section: Controller Circuitmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

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Optical wireless localization

et al. 2011

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“…Previous studies revealed that FSO-only mobile ad hoc networks are viable and using auto-alignment circuitry and protocol, line-of-sight issues can be remedied significantly [5][6][7][8]. However, FSO has not been used previously to solve the ad-hoc localization problem and they provide a substantial amount of potential as it is quite efficient to run triangulation algorithms using direction of reception (i.e., angle of arrival).…”

Section: Introductionmentioning

confidence: 96%

Localization in wireless sensor networks using directionally information

Kumar¹,

Radhakrishnan²,

Tomar³

2013

2013 3rd IEEE International Advance Computing Conference (IACC)

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Localization in sensor networks can be defined as ``identification of sensor node's position''. For any wireless sensor network, the accuracy of its localization approach is highly aimed. Here we explore the possibility of using free-space-optical (a.k.a. optical wireless) communications to solve the 3-D localization problem in ad-hoc networking environments. There are two methods to solve localization problem, Range based & Range Free. In Range-based methods require a higher node density or costly devices such as sonar. In our proposed approach we use direction related information provided by a physical layer using optical wireless, requiring a very low node density (2-connectedness) and no ranging technique. We analyze the accuracy of localization with respect to varying node designs (e.g., increased number of transceivers with better direction related information ) and density of GPS-enabled and ordinary nodes as well as messaging overhead per re-localization. This method still works well with sparse networks with little message overhead and small number of anchor nodes as little as 2.

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“…Our earlier work proto typed multi-element FSO structures [5] and showed that they can effectively be used for AoA detection as long as the receivers have a directional field-of-view (FOV).…”

Section: Introductionmentioning

confidence: 99%

AOA-based localization and tracking in multi-element VLC systems

Erogluy

Guvency

Palay

et al. 2015

2015 IEEE 16th Annual Wireless and Microwave Technology Conference (WAMICON)

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Visible light communication (VLC) is an emerging technology that is expected to be widely used for indoor wireless communications. Accurate localization of VLC equipment has a wide variety of applications in indoor scenarios, where GPS receivers do not work. This paper proposes a new and effective method for localization of VLC devices based solely on the con nectivity information. Due to narrow field of view characteristics of connected LEOs, angle of arrival to an access point can be estimated accurately. Exploiting such features, a least square estimator is developed for location estimation, and a Kalman filter is utilized for improving the tracking performance of a mobile device. Simulation results show that average localization accuracies on the order 0.2 meters can be achieved in various different access point topologies. Index Terms-Free space optics (FSO), Kalman filter, least squares estimator (LSE), light emitting diode (LED), optical wireless communications (OWC), tracking, visible light commu nication (VLC).

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Prototyping Multi-Transceiver Free-Space Optical Communication Structures

Cited by 16 publications

References 57 publications

Optical wireless localization

Optical wireless localization

Localization in wireless sensor networks using directionally information

AOA-based localization and tracking in multi-element VLC systems

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