Passive Indoor Localization for Visible Light Communication Systems

Majeed, Khaqan; Hranilovic, Steve

doi:10.1109/glocom.2018.8647875

Cited by 14 publications

(6 citation statements)

References 16 publications

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“…Substituting (11), (13), and (14) in (9), H is obtained, and based on (8), the components of the 2 × 2 matrix J(θ) can be found as…”

Section: Theoretical Limits On Localization Performancementioning

confidence: 99%

“…In these works, the transmitter on the user device sends narrow time-width pulses, and the receivers on the ceiling capture both the LOS and diffuse parts of the optical channel impulse response. Majeed et al introduce a complementary idea in [9] in which the location of objects in the room can be estimated passively using features of the impulse response of the channel between the photodetectors (PDs) and LEDs on the ceiling. Other researchers have shown interest in developing joint VLC localization and object detection using the multipath reflection information.…”

Section: Introductionmentioning

confidence: 99%

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Performance Limits for Fingerprinting-Based Indoor Optical Communication Positioning Systems Exploiting Multipath Reflections

Hosseinianfar

Brandt-Pearce

2020

IEEE Photonics J.

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Multipath reflection degrades the performance of visible light communications (VLC) based localization systems, where it is often considered as a strong random noise. However, due to the inherent transmission features of light, the optical wireless indoor channel is static; therefore, multipath components can be modeled as deterministic functions of the transceiver location, furnishings, and room geometry. In this paper, we investigate the performance limits of fingerprinting-based localization with multipath reflection as a source of information, i.e., a fingerprinting map. Limits on the localization accuracy are determined using the Cramer-Rao lower bound (CRLB) for different numbers of photodetectors deployed in the system and received signal features captured. The tightness of the analytical CRLB is tested by comparing it to the performance of a fingerprint-based positioning algorithm that uses the nearest neighbor method. Simulation results show an achievable root mean squared positioning accuracy of 45 cm and 5 cm (for one and four photodetectors, respectively), for an empty room. We then investigate the practical limitations on localization accuracy caused by a narrow transceiver bandwidth. Numerical results show that the localization system can still achieve decimeter accuracy for system bandwidths of 200 MHz, which makes fingerprinting schemes practical for off-the-shelf infrared devices.

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“…Substituting (11), (13), and (14) in (9), H is obtained, and based on (8), the components of the 2 × 2 matrix J(θ) can be found as…”

Section: Theoretical Limits On Localization Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Limits for Fingerprinting-Based Indoor Optical Communication Positioning Systems Exploiting Multipath Reflections

Hosseinianfar

Brandt-Pearce

2020

IEEE Photonics J.

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“…Visible light-based passive sensing techniques can be divided into two categories (adapted from [32]): (i) general visible light-based (unmodified lighting), with either a devicefree object (full passive) [17]- [19], [33], or a device-equipped object [34]- [37], and (ii) VLC-based techniques with an active transmitter and a device-free object [16], [20], [38]- [43].…”

Section: B Visible Light-based Passive Localizationmentioning

confidence: 99%

“…Majeed et al [16] introduce a VLC-based passive indoor localization approach where the location of an object is estimated by considering the impulse response between the photodetectors and LEDs on the ceiling. Other recent reflection-based techniques such as [17]- [19], which deploy different sensor arrangements, report promising accuracy.…”

Section: Introductionmentioning

confidence: 99%

Cooperative Passive Pedestrian Detection and Localization Using a Visible Light Communication Access Network

Hosseinianfar

Brandt-Pearce

2020

IEEE Open J. Commun. Soc.

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Visible light communication (VLC) systems are promising candidates for future indoor access and peer-to-peer networks. The performance of these systems, however, is vulnerable to line of sight (LOS) link blockage due to objects inside the room. Considering pedestrians as the most common VLC links blocking obstacles, we develop a probabilistic passive pedestrian detection and localization method. Our method takes advantage of the blockage status of VLC LOS links between the user equipment (UE) and transceivers on the ceiling to passively detect a single pedestrian, modeled as a cylinder with a random radius. The VLC network gathers the blockage status and computes the geometry of the LOS link graph through a cooperative scheme between VLC device-equipped users inside the room. We also develop a mathematical framework to obtain an optimum solution for estimating the location and size of the object and conclude with a sub-optimum estimation by simplifying the problem to a quadratic programming approach. Simulation results show that using a 5 × 5 grid of transceivers on the ceiling and as few as eight UEs, the root-mean-squared error in estimating the center and radius of the object can be less than 5 cm and 3 cm, respectively.

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“…Studies on RF systems have proposed methods to detect the presence of humans and determine their location inside the room by using discriminant features of the channel state information [10]. In [11], a VLCbased passive indoor localization approach is developed in which the location of the objects can be estimated using features of the impulse response between the photodetectors and LEDs on the ceiling. Another VLC-based object detection method that estimates the objects' parameters using the LOS is introduced in [12].…”

Section: Introductionmentioning

confidence: 99%

Cooperative Object Detection and Parameter Estimation Using Visible Light Communications

Hosseinianfar,

Brandt-Pearce

2020

Preprint

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Visible light communication (VLC) systems are promising candidates for future indoor access and peer-topeer networks. The performance of these systems, however, is vulnerable to the line of sight (LOS) link blockage due to objects inside the room. In this paper, we develop a probabilistic object detection method that takes advantage of the blockage status of the LOS links between the user devices and transceivers on the ceiling to locate those objects. The target objects are modeled as cylinders with random radii. The location and size of an object can be estimated by using a quadratic programming approach. Simulation results show that the root-mean-squared error can be less than 1 cm and 8 cm for estimating the center and the radius of the object, respectively.

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Passive Indoor Localization for Visible Light Communication Systems

Cited by 14 publications

References 16 publications

Performance Limits for Fingerprinting-Based Indoor Optical Communication Positioning Systems Exploiting Multipath Reflections

Performance Limits for Fingerprinting-Based Indoor Optical Communication Positioning Systems Exploiting Multipath Reflections

Cooperative Passive Pedestrian Detection and Localization Using a Visible Light Communication Access Network

Cooperative Object Detection and Parameter Estimation Using Visible Light Communications

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