Performance Analysis of Indoor Communication System Using Off-the-Shelf LEDs With Human Blockages

Singh, Anand; Ghatak, Gourab; Srivastava, Anand; Jagadeesan, Anand Kumar

doi:10.1109/ojcoms.2020.3048954

Cited by 29 publications

(11 citation statements)

References 37 publications

(53 reference statements)

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“…The layout of optical attocells plays a crucial role in the indoor VLC system, especially to ascertain the uniform distribution of received power and SNR over the communication plane [18][19][20][21]. Random movement of mobile terminals is a hindrance to mobile networking [22], in which performance parameters (e.g., received power & SNR) are not fairly distributed across the entire environment.…”

Section: Related Workmentioning

confidence: 99%

Optimizing Optical Attocells Positioning of Indoor Visible Light Communication System

Gismalla¹,

Azmi²,

Salim³

et al. 2023

Computers, Materials &Amp; Continua

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Visible light communication (VLC), which is a prominent emerging solution that complements the radio frequency (RF) technology, exhibits the potential to meet the demands of fifth-generation (5G) and beyond technologies. The random movement of mobile terminals in the indoor environment is a challenge in the VLC system. The model of optical attocells has a critical role in the uniform distribution and the quality of communication links in terms of received power and signal-to-noise ratio (SNR). As such, the optical attocells positions were optimized in this study with a developed try and error (TE) algorithm. The optimized optical attocells were examined and compared with previous models. This novel approach had successfully increased minimum received power from −1.29 to −0.225 dBm, along with enhanced SNR performance by 2.06 dB. The bit error rate (BER) was reduced to 4.42 × 10 −8 and 6.63 × 10 −14 by utilizing OOK-NRZ and BPSK modulation techniques, respectively. The optimized attocells positions displayed better uniform distribution, as both received power and SNR performances improved by 0.45 and 0.026, respectively. As the results of the proposed model are optimal, it is suitable for standard office and room model applications.

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Section: Related Workmentioning

confidence: 99%

Optimizing Optical Attocells Positioning of Indoor Visible Light Communication System

Gismalla¹,

Azmi²,

Salim³

et al. 2023

Computers, Materials &Amp; Continua

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show abstract

“…In [8], Stefan and Haas proposed an LED array arrangement by maximizing the area spectral efficiency as a metric, and obtained the array design parameters such as the distance between two adjacent LEDs by solving an optimization problem. In [9] and [10], Singh et al analyzed the performance of a multi-input VLC system by randomly deploying the LEDs and blocking the signal in the presence of human bodies. In [11], the authors also focused on minimizing the number of LEDs deployed for lighting purposes with a limited QoS, or on maximizing the average QoS with a fixed number of LEDs.…”

Section: Literature Surveymentioning

confidence: 99%

Improved LED arrangement through outage probability minimization in LiFi communication systems

Mohammadi

Sadough

2023

IET Communications

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In this paper, an improved method to arrange the light emitting diodes (LED) on the ceiling for an indoor visible light communication (VLC) system is proposed. More precisely, a LiFi‐based connection is considered where several LEDs are placed on the ceiling of an office and communicate with several receiver (user) located randomly within the room area. It is proposed to find the optimal location of the LEDs by minimizing the outage probability at the user's location. Both cases of static and mobile users are addressed. First, the closed‐form expression for the outage probability at the user's location is derived. Then, by minimizing the average outage probability, the optimal location of the LEDs is found. The numerical results show that the proposed LED arrangement outperforms the classically used uniform LED arrangement in terms of average outage probability at the receiver and reduces the necessary signal‐to‐noise ratio (SNR) to achieve a target average outage probability by about 3 and 2.2 dB for mobile and static users, respectively. They also show that the performance superiority of the proposed method over classical arrangement remains valid even under large estimation errors.

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“…In Refs. [14,15], Singh et al analysed the performance achieved with multi-input VLC system using random LED deployment under signal blockage in the presence of human bodies. In Ref.…”

Section: State-of-the-artmentioning

confidence: 99%

Enhanced secrecy outage probability for multiple‐input single‐output‐VLC systems through optical beamforming and improved light emitting diodes deployment

Mohammadi

Sadough

Ghassemlooy

2023

IET Optoelectronics

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The authors propose to arrange the light emitting diodes (LEDs) on the ceiling for an indoor visible light communication system in order to minimise the secrecy outage probability (SOP) at the location of the legitimate user (LU). More precisely, by deriving the secrecy capacity for a multiple‐input single‐output‐VLC system, we evaluate the SOP at the LU's location which is used as the appropriate metric to determine the position of the LEDs on the ceiling. To mitigate the effect of the eavesdropper, we derive the optimal beamforming coefficients which are used at the transmitter LED array with the aim of maximising the signal‐to‐noise ratio at the LU. Simulation results show that for a SOP of 10−4, the proposed SOP‐based LED arrangement with optimal beamforming offers up to 3 dB gain in transmit power compared to the classical uniform LED arrangement with sub‐optimal zero‐forcing beamforming. Moreover, they show that by using the proposed method, the SOP is kept below a desired threshold, over a wider area inside the indoor environment compared to classical methods.

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Performance Analysis of Indoor Communication System Using Off-the-Shelf LEDs With Human Blockages

Cited by 29 publications

References 37 publications

Optimizing Optical Attocells Positioning of Indoor Visible Light Communication System

Optimizing Optical Attocells Positioning of Indoor Visible Light Communication System

Improved LED arrangement through outage probability minimization in LiFi communication systems

Enhanced secrecy outage probability for multiple‐input single‐output‐VLC systems through optical beamforming and improved light emitting diodes deployment

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