Interference mitigation technique with coverage improvement in indoor VLC system

Shashikant, .; Garg, Parul; Sharma, Prabhat Kumar

doi:10.1002/ett.3511

Cited by 10 publications

(6 citation statements)

References 20 publications

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“…Undoubtedly, T in (23) represents the simplest form of the projection matrix. However, in reality the intrinsic and extrinsic parameters (calibration) is also required.…”

Section: Occ-based Motion Capturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Increasing the field of view of the LEDs improves the coverage; however, it increases the interference at the receiver. Signal-to-interference ratio based methods can be used to analyze the coverage and interference problems in VLC systems [23]. Different from VLC, Li-Fi is an LED transmitter based light networking technology that involves multiple user access, bidirectional communications, multi-cell handover, etc.…”

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confidence: 99%

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Optical camera communications: Survey, use cases, challenges, and future trends

Saeed

Guo

Park

et al. 2019

Physical Communication

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Recently, a camera or an image sensor receiver based optical wireless communications (OWC) techniques have attracted particular interest in areas such as the internet of things, indoor localization, motion capture, and intelligent transportation systems. As a supplementary technique of high-speed OWC based on photo-detectors, communications hinging on image sensors as receivers do not need much modification to the current infrastructure, such that the implementation complexity and cost are quite low. Therefore, in this paper, we present a comprehensive survey of optical camera communication (OCC) techniques, and their use in localization, navigation, and motion capture. This survey is distinguishable from the existing reviews on this topic by covering multiple aspects of OCC and its various applications. The first part of the paper focuses on the standardization, channel characterization, modulation, coding, synchronization, and signal processing techniques for OCC systems while the second part of the article presents the literature on OCC based localization, navigation, motion capture, and intelligent transportation systems. Finally, in the last part of the paper, we present the challenges and future research directions of OCC.(OCC) [5]. FSO communication systems consist of a laser diode (LD) transmitter and a photodiode (PD) receiver. It typically relies on UV or visible bands, offers high rate transmission in a long distance, and can be used for a backhaul of communication networks. However, FSO communications need a strict alignment, and consequently, their cost at transceivers is high. Also, FSO communication systems suffer from atmospheric turbulence which can be mitigated by using different statistical channel models [6,7,8,9,10], robust modulation techniques [11,12], and accurate pointing and tracking methods [13,14,15]. On the other hand, VLC hinging on visible bands is an LD or light emitting diode (LED) transmitter and PD receiver-based medium-range communication technology. VLC is capable of offering high data rate within a range of tens of meters but does not consider multiple user access. The advancement of VLC systems has also led to enable various location aware indoor applications. Recently, several indoor localization systems based on VLC are proposed [16,17,18,19,20]. Interested readers are referred to [21,22], and the references therein for VLC based indoor localization and tracking methods. Nevertheless, the VLC technology suffers from both limited coverage and interference. Increasing the field of view of the LEDs improves the coverage; however, it increases the interference at the receiver. Signal-to-interference ratio based methods can be used to analyze the coverage and interference problems in VLC systems [23]. Different from VLC, Li-Fi is an LED transmitter based light networking technology that involves multiple user access, bidirectional communications, multi-cell handover, etc. The emerging Li-Fi supports mobile communica-

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“…Undoubtedly, T in (23) represents the simplest form of the projection matrix. However, in reality the intrinsic and extrinsic parameters (calibration) is also required.…”

Section: Occ-based Motion Capturementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Optical camera communications: Survey, use cases, challenges, and future trends

Saeed

Guo

Park

et al. 2019

Physical Communication

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“…A further better variation of ADR is the constraint‐field‐of‐view ADR, which can enhance the performance of the system by mitigating the co‐channel interference 18 . In Reference 19, an interference mitigation technique based on a mechanical rotation mechanism has been introduced for indoor VLC systems to increase the coverage probability.…”

Section: Introductionmentioning

confidence: 99%

Continuous phase modulation with chaotic interleaving for visible light communication systems based on orthogonal frequency division multiplexing

Eldeeb

Al-Nahhal

Selmy

et al. 2020

Trans Emerging Tel Tech

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Visible light communication (VLC) is one of the most promising technologies which offers high data rates and flexible cost‐effective networking solutions for indoor applications. In VLC systems, the optical orthogonal frequency division multiplexing (OFDM) is considered as an efficient technique to avoid VLC channel selectivity. However, OFDM suffers from the high peak‐to‐average‐power‐ratio (PAPR) problem, which degrades the VLC system performance. In this article, we consider the use of a chaotic‐interleaver‐based continuous‐phase‐modulation (CI‐CPM) scheme together with frequency domain equalization (FDE) at the receiver end of the VLC system. A direct current bias is added to the signal to provide real‐valued non‐negative signals for intensity modulation. The proposed scheme outperforms the conventional ones in terms of PAPR. Additionally, it takes the advantages of CPM power efficiency and frequency diversity. Furthermore, three types of FDE techniques are considered and compared including the zero‐forcing (ZF) equalizer, the minimum mean square error equalizer and the regularized ZF equalizer.

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“…The femtocell-like deployment of VLC in indoor environments leaded to the concept of optical attocells [22], a three-dimensional attocell model was considered in [23], and an analysis framework was introduced for coverage probability analysis in multi-user VLC networks. Shashikant proposed a method that simultaneously reduced the interference caused by multiple sources in indoor VLC system and improved the coverage area [24]. However, most research of VLC coverage issues only analyzed the impact of some quality of service (QoS) parameters on coverage performance, but did not discuss the effects of user equipments (UEs) accessing strategy, and resource allocation methods.…”

Section: Introductionmentioning

confidence: 99%

QoE Probability Coverage Model of Indoor Visible Light Communication Network

Bao

Zhang

et al. 2020

IEEE Access

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As a candidate wireless communication technology in future, visible light communication (VLC) not only provides the green illumination, but also transmits data at high speed without occupying the existing radio frequency (RF) spectrum resources, hence it can offload the data traffic from the crowded RF network. However, achieving satisfying traffic service with probability almost approaching one inside an indoor scenario is not an effortless task in VLC networks. Several factors such as transmitted power, number of user equipments (UEs), and multiple access schemes affect the coverage probability. In this paper, we utilize the user quality of experience (QoE) as the system performance metric, and the QoE probability coverage model is proposed which the LED coverage area projecting on the ground, we attempt to achieve a satisfying QoE with a certain probability on UEs. We investigate how the factors including non-orthogonal multiple access (NOMA) scheme, user pairing scheme, UE density, power allocation methods etc. affect the reliable QoE probability coverage area which contributes to a VLC network deployment, multiple access protocols and handover schemes. INDEX TERMS Visible light communication (VLC), non-orthogonal multiple access (NOMA), coverage probability, quality of experience (QoE).

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Interference mitigation technique with coverage improvement in indoor VLC system

Cited by 10 publications

References 20 publications

Optical camera communications: Survey, use cases, challenges, and future trends

Optical camera communications: Survey, use cases, challenges, and future trends

Continuous phase modulation with chaotic interleaving for visible light communication systems based on orthogonal frequency division multiplexing

QoE Probability Coverage Model of Indoor Visible Light Communication Network

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