State estimation and motion tracking for spatially diverse VLC networks

Rahaim, Michael; Prince, Gregary B.; Little, Thomas D. C.

doi:10.1109/glocomw.2012.6477760

Cited by 32 publications

(14 citation statements)

References 10 publications

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“…Because of the many advantages of LEDs, there are an increasing number of papers published describing a variety of schemes for indoor positioning using LEDs [12]- [18]. The ranging techniques used in these papers include received signal strength (RSS) [12]- [14], [17], [18], time difference of arrival (TDOA) [15], and phase difference of arrival (PDOA) [16]. Most of the papers published so far have presented either theoretical analyses or simulation results for very specific idealized scenarios in which parameters such as the optical power transmitted and the radiation pattern of each LED are precisely known.…”

mentioning

confidence: 99%

Position Accuracy of Time-of-Arrival Based Ranging Using Visible Light With Application in Indoor Localization Systems

Wang

Şekercioğlu

Neild

et al. 2013

J. Lightwave Technol.

253

239

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This paper analyzes an indoor positioning system that uses white lighting LEDs. Modulated signals transmitted by the LEDs are used as the basis of time-of-arrival-based distance estimation. The theoretical limits on the accuracy of estimation are calculated by deriving the Cramer-Rao bound for intensity modulated windowed sinusoidal signals. Calculations for a typical indoor scenario, assuming perfect synchronization between transmitter and receiver, but using realistic values for other parameters show that very accurate distance estimates are achievable, with typical errors being in the order of centimeters depending on the frequency and power of the sinusoidal signals, the distance from the LED and the properties of the LED and the photoreceiver.Index Terms-Cramer-Rao bound, indoor localization, intensity modulation and direct detection, ranging, time-of-arrival, visible light communication, windowed sinusoid.

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mentioning

confidence: 99%

Position Accuracy of Time-of-Arrival Based Ranging Using Visible Light With Application in Indoor Localization Systems

Wang

Şekercioğlu

Neild

et al. 2013

J. Lightwave Technol.

253

239

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“…The general form of Kalman filter can be derived from [6], where the linear state vector is x, refers to the coordinates velocities in space and y refers to the received powers from A through E and an external source at F. Considering process and observation noises to be independent, zero-mean, Gaussian white noises, the general state and observation equations can be represented as [ 1] [ ] [ ] t t w t + = + x Tx (3) [ ]…”

Section: State Model and Trackingmentioning

confidence: 99%

“…Our state space model implementation is based on the extension from [3], where transmitters and receiver remain stationary in z dimension; in our case, we assume that the transmitters remain stationary in 3-D and the receiver is free to move in all directions. The model is defined in equations (3), (4), (5) and (6).…”

Section: Icton 2015mentioning

confidence: 99%

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Balloon mesh free space optical communication with tracking and link switching

Awan

Mohan

2015

2015 17th International Conference on Transparent Optical Networks (ICTON)

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Optical beam alignment is the key requirement to maintain a connection between two optical nodes in free space optical (FSO) communication networking. Google has proposed FSO embodiments for building a network at high altitude, the objective of which is to provide Internet connectivity to remote locations around the globe. FSO communication has the potential to build a high bandwidth backhaul network with wireless optical communication systems using a balloon mesh network. Due to winds, balloons can drift in space leading to the misalignment of FSO connections between adjacent balloons. In this paper, we propose an algorithm to track the drifting balloon and evaluate the tracking system by state estimation of the drifting balloon's position with respect to another nearest balloon. We also propose a backup optical link to keep the network intact in case of failure due to a balloon's misalignment with an adjacent balloon. Our approach uses Kalman filtering based state estimation technique for three dimensional movement and speed.

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“…the received signal strength (RSS) [11], [12], [13], the angle-of-arrival (AOA) [14], [15] or the time-of-arrival (TOA) [16], [17]. Among these techniques, we distinguish the approaches that make use of the knowledge of the radiation pattern of the LEDs, i.e.…”

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confidence: 99%

Influence of the aperture-based receiver orientation on RSS-based VLP performance

Menéndez

Steendam

2017

2017 International Conference on Indoor Positioning and Indoor Navigation (IPIN)

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Abstract-Recently, a compact receiver structure, containing a set of apertures and photo diodes (PDs) that are arranged to offer good angular diversity, was proposed for visible light communication [1]. In [2], this receiver structure was considered for visual light positioning (VLP), where the positioning accuracy for direct estimation of the position was evaluated using the Cramer-Rao Lower bound. However, it was assumed that the receiver is parallel to the ceiling, an assumption that is not realistic in practice. Therefore, in this paper, we extend the results of [2] to include the orientation of the receiver in the performance evaluation. The results show that, provided that the receiver knows its orientation, a rotation of the receiver has essentially no effect on the performance. Further, as long as sufficient LEDs are within the field-of-view of the receiver, the performance degradation will be small. This will be the case for a wide range of tilt angles. Hence, we can conclude that centimetre accuracy can be obtained for a wide range of receiver orientations.

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State estimation and motion tracking for spatially diverse VLC networks

Cited by 32 publications

References 10 publications

Position Accuracy of Time-of-Arrival Based Ranging Using Visible Light With Application in Indoor Localization Systems

Position Accuracy of Time-of-Arrival Based Ranging Using Visible Light With Application in Indoor Localization Systems

Balloon mesh free space optical communication with tracking and link switching

Influence of the aperture-based receiver orientation on RSS-based VLP performance

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