On the Ergodic Channel Capacity for Indoor Visible Light Communication Systems

Xu, Ke; Yu, Hongyi; Zhu, Yi-Jun; Sun, Youming

doi:10.1109/access.2017.2650965

Cited by 33 publications

(17 citation statements)

References 27 publications

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“…First, in understanding the effects of human blocking and shadowing on the VLC channel, to the best of the authors' knowledge, all of the past work in the literature has utilized either models with no mobility of humans over the observation interval [8], [9] or a priori, random movement models: In [10], each simulated pedestrian picks a speed that is uniformly distributed on the interval [0, 4] km/h and a direction that is uniform over [0, 2π] and walks for 5 seconds, before the same selection is repeated. In [11], two probabilistic mobility models are utilized: Under the random walk model, a human picks a direction that is uniformly distributed on [0, 2π]. Under the ''main spot'' model, the probability that a human sits at a particular location on the two-dimensional (2D) plane is modeled as a 2D Gaussian random variable with a higher probability density at certain main spots such as sofas and desks.…”

Section: Relationship To the State Of The Artmentioning

confidence: 99%

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Characterization of Line-of-Sight Link Availability in Indoor Visible Light Communication Networks Based on the Behavior of Human Users

et al. 2020

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We characterize the line-of-sight (LOS) link availability in indoor visible light communication (VLC) networks based on the behavior of human users. The VLC link availability is impacted by humans in three distinct ways: (1) Users turn the lights on or off in each room. (2) Users may carry mobile devices. (3) Users constitute mobile obstacles that block or shadow the channel between the transmitter and the receiver. First, we develop a mathematical framework for VLC link availability and a probabilistic model of the VLC network with respect to human behavior in indoor environments. Second, we design a realistic multiuser , indoor VLC system simulation with static and mobile VLC devices that are expected to be found in smart home environments. We present the following four sets of results: (1) We report statistics on the blockage durations of VLC links and categorize the links with respect to these statistics. (2) We demonstrate the performance of Selection Diversity versus Maximal Ratio Combining for mobile VLC devices carried by humans in a smart home setting. (3) We show that optimal LED resource allocation policies for multiple users are impacted by the VLC link blockage events caused by humans. (4) We demonstrate that the link blockage events in different rooms become dependent due to humans who transition between rooms. Based on our results, we provide new directions for the design of network architectures for indoor VLC systems.

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Section: Relationship To the State Of The Artmentioning

confidence: 99%

“…the link is blocked), based on the distribution of the blockage duration and the delay constraint of the application, the network can decide on the timing of the next re-transmission attempt to that device. 11…”

Section: ) Blockage Durations Of Individual Vlc Links To Static Devicesmentioning

confidence: 99%

Characterization of Line-of-Sight Link Availability in Indoor Visible Light Communication Networks Based on the Behavior of Human Users

et al. 2020

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“…Nevertheless, PLC has witnessed a lot of research interests on its capacity . On the VLC side, less findings are proposed . Nevertheless, the topic is well treated.…”

Section: Integration Of Plc and Vlc Channelsmentioning

confidence: 99%

Hybrid PLC‐VLC channel model and spectral estimation using a nonparametric approach

Ndjiongue

Ferreira

Song

et al. 2017

Trans Emerging Tel Tech

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Telecommunication engineering may substantially benefit from the integration of power line communication (PLC) and visible light communication (VLC) technologies. This integration is enabled firstly by the ubiquitous nature of PLC and VLC infrastructures and secondly by the recent advances made in both technologies, and it will be effective with the knowledge of the cascaded PLC‐VLC channel. This paper reports on the spectral analysis and estimation of the dual channel for hybrid systems involving PLC and VLC technologies. The channels are statistically analysed using the nonparametric windowed Welch method. Experimental results giving varieties of simulated PLC‐VLC channel are presented. They show the influence of the number of taps (PLC side) and the line‐of‐sight and the non–line‐of‐sight gains (VLC side) on the PLC‐VLC frequency response. It also indicates that the cascaded channel is influenced by propagation distance and room area. We also show the influence of PLC and VLC channel parameters on the gain and notches.

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“…Channel capacity is an important indicator to evaluate the system performance of a communication link. For a visible light communication (VLC) system, the closed-form expression of the tight bounds on the capacity are presented in [11,12]. However, for UWOC, analyzing capacity is still a work in progress [13,14] because the underwater channel model is difficult to be depicted by a closed-form expression.…”

Section: Introductionmentioning

confidence: 99%

Effect of Receiver’s Tilted Angle on the Capacity for Underwater Wireless Optical Communication

Huang

et al. 2020

Electronics

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This paper focuses on the effect of the receiver’s tilted angle on the capacity of a clear ocean water Underwater Wireless Optical Communication (UWOC) system. To achieve this goal, the relationship between the channel capacity and the receiver’s tilted angle is investigated. First, we propose a double-exponential fading model with pointing error which can more accurately depict the channel of clear ocean water UWOC instead of the traditional Beer’s law model. Based on this channel model, we present the close-form expression of the capacity bounds of the UWOC system. Then, an optimization problem is formulated to improve the capacity by tilting the receiving plane. Both theoretical analyses and simulation results verify that the capacity bounds of UWOC can be enhanced dramatically by tilting the receiver plane at an optimal angle. Thus, in practice, we can provide an effective design strategy for a UWOC system.

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On the Ergodic Channel Capacity for Indoor Visible Light Communication Systems

Cited by 33 publications

References 27 publications

Characterization of Line-of-Sight Link Availability in Indoor Visible Light Communication Networks Based on the Behavior of Human Users

Characterization of Line-of-Sight Link Availability in Indoor Visible Light Communication Networks Based on the Behavior of Human Users

Hybrid PLC‐VLC channel model and spectral estimation using a nonparametric approach

Effect of Receiver’s Tilted Angle on the Capacity for Underwater Wireless Optical Communication

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