Analyzing the Effects of LED Lamp Arrangements on Performance of an Indoor Visible Light Communication System

Masroor, Komal; Jeoti, Varun; Drieberg, Micheal

doi:10.1109/micc48337.2019.9037594

Cited by 4 publications

(6 citation statements)

References 9 publications

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“…The performance metrics used in our analysis are the achievable data rate, surface illumination, illumination uniformity, and data rate uniformity. Illumination uniformity can be defined as the ratio between the minimum and the average illumination among all surfaces or sensing points in an indoor environment [4], [5], [15]. Similarly, data rate uniformity refers to the ratio between the minimum and the average data rate among all surfaces or users.…”

Section: Analysis Of Achievable Data Rate and Illumination Performancementioning

confidence: 99%

“…Similarly, data rate uniformity refers to the ratio between the minimum and the average data rate among all surfaces or users. According to [5], values close to 1 indicate uniform lighting or data rate condition and, in general, values more than 0.7 are desired. However, a uniformity value of 0.4 is considered the least acceptable for illumination purposes [15].…”

Section: Analysis Of Achievable Data Rate and Illumination Performancementioning

confidence: 99%

“…This is because of the huge and unlicensed bandwidth availability in the visible light spectrum and the rapid development of light-emitting diodes (LEDs), which serve as transmitters in VLC. However, the practical deployment of VLC systems, especially in indoor environments, has been faced with unique challenges such as non-uniform illumination and data rate coverage [2]- [5], line-of-sight (LoS) blockages, random device orientation, and loss of incident signal power in VLC receivers [6]. The focus of this article relates to the non-uniform illumination and data rate coverage design issue.…”

Section: Introductionmentioning

confidence: 99%

“…In [3], the authors investigated the bit error rate and channel capacity performance of circular and centered LED arrangements. In [5], the authors analyzed the effects of LED array layout on the illumination uniformity of VLC systems. An optimization problem to determine the optimal placement of LED arrays to maximize the average area spectral efficiency has been considered in [7].…”

Section: Introductionmentioning

confidence: 99%

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Design and Optimization of Liquid Crystal RIS-Based Visible Light Communication Receivers

et al. 2022

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In the design of reconfigurable intelligent surfaces (RISs)-aided visible light communication (VLC) systems, most studies have focused on the deployment of mirror arrays and metasurfaces on walls to influence signal propagation and enhance communication performance. This paper provides a new research direction in the design and performance optimization of RIS-aided VLC systems whereby voltage-controlled tunable liquid crystals (LCs) are deployed as part of the VLC receiver. The purpose of the LC RIS is to provide incident light steering and intensity amplification in order to improve the received signal strength and the corresponding achievable data rate. More specifically, an LC RIS-based VLC receiver design is proposed and its operating principles and the channel model for a VLC system with such a receiver are provided. Since the refractive index of the LC RIS plays a critical role in the wave-guiding and light amplification capabilities of this novel receiver, a rate maximization problem is considered to achieve the optimal refractive index and the required voltage to obtain the best light amplification and data rate performances. This communication design problem is a non-convex optimization problem for which a metaheuristic approach is developed based on the sine-cosine algorithm. Simulation results are used to confirm the considerable data rate improvement by the proposed LC RIS-based VLC receiver and optimization algorithm when compared to a VLC receiver without the LC RIS and a baseline scheme, respectively.

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Section: Analysis Of Achievable Data Rate and Illumination Performancementioning

confidence: 99%

Section: Analysis Of Achievable Data Rate and Illumination Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design and Optimization of Liquid Crystal RIS-Based Visible Light Communication Receivers

et al. 2022

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“…In our previous work [ 12 ], we analyzed the effects of transmitter layout on illuminance uniformity for which we studied three different scenarios, i.e. : (a) single transmitter, (b) the generalized centrally lit quadrants (CLQ) with four transmitters, and (c) the proposed scheme of relocating all four transmitters towards each corner of the room referred to as corner illuminated quadrants (CoIQ).…”

Section: Introductionmentioning

confidence: 99%

A Heuristic Approach for Optical Transceiver Placement to Optimize SNR and Illuminance Uniformities of an Optical Body Area Network

Masroor

Jeoti

Drieberg

et al. 2021

Sensors

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The bi-directional information transfer in optical body area networks (OBANs) is crucial at all the three tiers of communication, i.e., intra-, inter-, and beyond-BAN communication, which correspond to tier-I, tier-II, and tier-III, respectively. However, the provision of uninterrupted uplink (UL) and downlink (DL) connections at tier II (inter-BAN) are extremely critical, since these links serve as a bridge between tier-I (intra-BAN) and tier-III (beyond-BAN) communication. Any negligence at this level could be life-threatening; therefore, enabling quality-of-service (QoS) remains a fundamental design issue at tier-II. Consequently, to provide QoS, a key parameter is to ensure link reliability and communication quality by maintaining a nearly uniform signal-to-noise ratio (SNR) within the coverage area. Several studies have reported the effects of transceiver related parameters on OBAN link performance, nevertheless the implications of changing transmitter locations on the SNR uniformity and communication quality have not been addressed. In this work, we undertake a DL scenario and analyze how the placement of light-emitting diode (LED) lamps can improve the SNR uniformity, regardless of the receiver position. Subsequently, we show that using the principle of reciprocity (POR) and with transmitter-receiver positions switched, the analysis is also applicable to UL, provided that the optical channel remains linear. Moreover, we propose a generalized optimal placement scheme along with a heuristic design formula to achieve uniform SNR and illuminance for DL using a fixed number of transmitters and compare it with an existing technique. The study reveals that the proposed placement technique reduces the fluctuations in SNR by 54% and improves the illuminance uniformity up to 102% as compared to the traditional approach. Finally, we show that, for very low luminous intensity, the SNR values remain sufficient to maintain a minimum bit error rate (BER) of 10−9 with on-off keying non-return-to-zero (OOK-NRZ) modulation format.

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Optical Wireless Communication Based Wireless Body Area Network for Remote Patient Monitoring

Masroor

Mumtaz

Drieberg

et al. 2022

International Conference on Artificial Intelligence for Smart Community

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Analyzing the Effects of LED Lamp Arrangements on Performance of an Indoor Visible Light Communication System

Cited by 4 publications

References 9 publications

Design and Optimization of Liquid Crystal RIS-Based Visible Light Communication Receivers

Design and Optimization of Liquid Crystal RIS-Based Visible Light Communication Receivers

A Heuristic Approach for Optical Transceiver Placement to Optimize SNR and Illuminance Uniformities of an Optical Body Area Network

Optical Wireless Communication Based Wireless Body Area Network for Remote Patient Monitoring

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