Optimisation of Lambertian order for indoor non-directed optical wireless communication

Wu, Dehao; Ghassemlooy, Zabih; Minh, Hoa Le; Rajbhandari, Sujan; Khalighi, Mohammad-Ali

doi:10.1109/icccw.2012.6316472

Cited by 24 publications

(14 citation statements)

References 18 publications

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“…22,27 The expression for the OLO m opt is given as Employing LEDs with an OLO is an efficient method to significantly improve the system performance without increasing the complexity, which was proposed and investigated in our earlier work.…”

Section: Optimum Lambertian Ordermentioning

confidence: 99%

“…30 For an LED source, S i emits a unit impulse at t ¼ 0 with a normalized transmit optical power P Tx ¼ 1 and using a nonimaging lens at the PD (i.e., d F ¼ 0), the LOS (k ¼ 0) impulse response was derived in our early work, 22,27 which is given as E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 1 5 ; 3 2 6 ; 5 1 5 30 For an LED source, S i emits a unit impulse at t ¼ 0 with a normalized transmit optical power P Tx ¼ 1 and using a nonimaging lens at the PD (i.e., d F ¼ 0), the LOS (k ¼ 0) impulse response was derived in our early work, 22,27 which is given as E Q -T A R G E T ; t e m p : i n t r a l i n k -; e 0 1 5 ; 3 2 6 ; 5 1 5…”

Section: Multipath Characteristicsmentioning

confidence: 99%

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Effect of optimal Lambertian order for cellular indoor optical wireless communication and positioning systems

Ghassemlooy

Zhong

et al. 2016

Opt. Eng

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We propose and analyze an optimized Lambertian order (OLO) of light-emitting diode for both indoor cellular optical wireless communication and positioning systems. We carry out analysis for the system consisting of a Lambertian source and a tilted optical receiver, and develop an expression for OLO for four-, six-, and ninecell configurations. We investigate the channel characteristics including the optical path loss, impulse response, transmission bandwidth, and positioning accuracy for the proposed systems with and without OLO, showing that there is a significant improvement in the transmission bandwidth as well as the positioning accuracy when employing OLO. For example, for a four-cell configuration with the optimum Lambertian order, 99% of cumulative distribution function of the estimation errors is within the Cramer-Rao bound (CRB) accuracy of 6.7 to 26.7 cm, compared to the CRB accuracy of 12.8 to 29.7 cm for the Lambertian order of m ¼ 1.

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Section: Optimum Lambertian Ordermentioning

confidence: 99%

Section: Multipath Characteristicsmentioning

confidence: 99%

Effect of optimal Lambertian order for cellular indoor optical wireless communication and positioning systems

Ghassemlooy

Zhong

et al. 2016

Opt. Eng

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“…In non-directed-LOS, a wide beam transmitter and wide FOV receivers are used to achieve a broader coverage area. Non-directed-LOS can be used in point-multipoint communications [2]. In this type of link topology, in addition to the LOS link, there are also other multiple signal reflections from the walls and objects of the room.…”

Section: Basics Link Types Of Vlcmentioning

confidence: 99%

“…It described these four basic link topologies. These four link characteristics were classified as directed-LOS, non-directed-LOS, non-directed-NLOS and tracked [2]. The coverage and data rate of such link designs were also provided in Many other advanced link topologies such as multispot diffuse link, DSD was also discussed In this thesis, nondirected LOS with tracking link topology was assumed to exist between transmitter and receiver and investigated the first scenario (data download on the move in VLC coverage).…”

Section: Introductionmentioning

confidence: 99%

Analysis of visible light communication (VLC)for biomedical application

Yogeeswaran¹,

Ramesh²

2018

IJET

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In the visible light communication (VLC), light emitting diodes (LEDs) are used as transmitters; the air is the transmission medium and the photodiodes are used for receivers. This is often referred to as light fidelity (Li-Fi). In this method, provide the methodology to evaluate the performance of VLC hotspot networks in the context of data downloading on the move scenarios by using throughput-distance relationship models. In this context, firstly, study the different properties of optical transceiver elements, noise sources, characterization interference, and different link topologies and then introduce the throughput-distance relationship model. Secondly, the analytically based throughput-distance relationship has been developed for evaluating the performance of VLC hotspot networks in indoor environment in both day and night conditions. Simulation results reveal that background noise has a significant impact on the performance of VLC hotspots. As expected, in both indoor and outdoor environments VLC hotspot performs better at night than during the day. The performance of VLC hotspot networks is also quantified in terms of received file size at different bit error rate requirements and velocities of the mobile user.

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“…In [21] the authors vary the transmitter semiangle to reduce the spatial variations in power. The work in [22], [23] explores optimizing the Lambertian order to maximize the minimum power in a room. However, the works mentioned do not consider an illuminance constraint.…”

Section: Introductionmentioning

confidence: 99%

Interference Mitigation Through User Association and Receiver Field of View Optimization in a Multi-User Indoor Hybrid RF/VLC Illuminance-Constrained Network

2020

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Optimisation of Lambertian order for indoor non-directed optical wireless communication

Cited by 24 publications

References 18 publications

Effect of optimal Lambertian order for cellular indoor optical wireless communication and positioning systems

Effect of optimal Lambertian order for cellular indoor optical wireless communication and positioning systems

Analysis of visible light communication (VLC)for biomedical application

Interference Mitigation Through User Association and Receiver Field of View Optimization in a Multi-User Indoor Hybrid RF/VLC Illuminance-Constrained Network

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