10  Gbps Mobile Visible Light Communication System Employing Angle Diversity, Imaging Receivers, and Relay Nodes

Hussein, Ahmed Taha; Elmirghani, Jaafar M. H.

doi:10.1364/jocn.7.000718

Cited by 80 publications

(65 citation statements)

References 48 publications

(55 reference statements)

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“…Therefore, in this study reflections up to the second order were considered, since the second order reflections can have a great impact on the system performance at multi gigabits per second data rates [21]. Reflections can continue beyond second-order, however it is noted that the power received from the third-order reflections for the VLC systems is extremely low compared to LOS, first-order, and secondorder reflections [16]. Therefore, for convenience, computer analysis up to second-order reflections has been considered in this study.…”

Section: The Vlc Room Setup and Channel Characteristicsmentioning

confidence: 99%

“…A data rate of 10 Gbps in a realistic environment has been shown to be possible with a VLC system when a delay adaptation technique in conjunction with laser diodes and imaging receiver were used with a simple modulation format (OOK) and without the use of relatively complex wavelength division multiplexing approaches [13]. Significant improvements were shown to be possible when a VLC relay assisted system is combined with an imaging receiver and a delay adaptation technique [16]. However given typical parameters, the latter system cannot provide a throughput beyond 10 Gbps due to its low signal to noise ratio (SNR).…”

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confidence: 99%

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Fast and Efficient Adaptation Techniques for Visible Light Communication Systems

Hussein

Alresheedi

Elmirghani

2016

J. Opt. Commun. Netw.

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Abstract-Beam steering visible light communication (VLC) system has been shown to offer performance enhancements over traditional VLC systems. However, an increase in the computational cost is incurred. In this paper, we introduce fast computer generated holograms (FCGHs) to speed up the adaptation process. The new, fast and efficient fully adaptive VLC system can improve the receiver signal to noise ratio (SNR) and reduce the required time to estimate the position of the VLC receiver. It can also adapt to environmental changes, providing a robust link against signal blockage and shadowing. In addition, an angle diversity receiver (ADR) and a delay adaptation technique are used to reduce the effect of inter symbol interference (ISI) and multipath dispersion. Significant enhancements in the SNR, with VLC channel bandwidths of more than 26 GHz are obtained, resulting in a compact impulse response and a VLC system that is able to achieve higher data rates (25 Gbps) with full mobility in the considered realistic indoor environment.Index Terms-Beam Steering, angle diversity receiver, fast computer generated hologram, delay adaptation technique, SNR.

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Section: The Vlc Room Setup and Channel Characteristicsmentioning

confidence: 99%

mentioning

confidence: 99%

Fast and Efficient Adaptation Techniques for Visible Light Communication Systems

Hussein

Alresheedi

Elmirghani

2016

J. Opt. Commun. Netw.

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“…Therefore, in this study reflections up to the second order were considered, since the second order reflections can have a great impact on the system performance at multi gigabits per second data rates [13]. Reflections can continue beyond second-order, however it is noted that the power received from the third-order reflections for the VLC systems is extremely low compared to LOS, first-order, and second-order reflections [7]. Therefore, for convenience, computer analysis up to second-order reflections has been considered in this study.…”

Section: Vlc Room Setupmentioning

confidence: 99%

“…A data rate of 10 Gbps in a realistic environment has been shown to be possible with a VLC system when a delay adaptation technique in conjunction with laser diodes and imaging receiver were used with a simple modulation format (on-off keying, OOK) and without the use of relatively complex wavelength division multiplexing approaches [4]. Significant improvements were shown to be possible when a VLC relay assisted system is combined with an imaging receiver and a delay adaptation technique [7]. However, given typical parameters, the latter system cannot provide a throughput beyond 10 Gbps due to its low signal to noise ratio (SNR).…”

Section: Introductionmentioning

confidence: 99%

25 Gbps mobile visible light communication system employing fast adaptation techniques

Hussein

Alresheedi

Elmirghani

2016

2016 18th International Conference on Transparent Optical Networks (ICTON)

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Visible light communication (VLC) systems have typically operated at data rates below 20 Gbps and operation at this data rate was shown to be feasible by using laser diodes (LDs), beam steering, imaging receivers and delay adaptation techniques. However, an increase in the computational cost is incurred. In this paper, we introduce fast computer generated holograms (FCGHs) to speed up the adaptation process. The new, fast and efficient fully adaptive VLC system can improve the receiver signal to noise ratio (SNR) and reduce the required time to estimate the position of the VLC receiver. In addition, an imaging receiver and a delay adaptation technique are used to reduce the effect of inter symbol interference (ISI) and multipath dispersion. Significant enhancements in the SNR, with VLC channel bandwidths of more than 36 GHz are obtained resulting in a compact impulse response and a VLC system that is able to achieve higher data rates (25 Gbps) with full mobility in the considered indoor environment. Keywords:Beam steering, imaging receiver, fast computer generated hologram, delay adaptation technique, SNR. INTRODUCTIONTraditional radio and microwave communication systems suffer from limited channel capacity due to the limited radio spectrum available, while the data rates requested by the users continue to increase exponentially. Achieving very high data rates (multi gigabits per second) using the relatively narrow bandwidth of microwave and millimetre wave systems is challenging [1]. According to a GreenTouch research study, mobile Internet traffic over this decade (2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017)(2018)(2019)(2020)) is expected to increase by 150 times [2]. Given this expectation of dramatically growing demand for data rates, the quest is already underway for alternative spectrum bands beyond microwaves and millimetre waves. Different technology candidates have entered the race to provide ultra-fast wireless communication systems for users. Visible light communication (VLC) systems are among the promising solutions to the bandwidth limitation problem faced by microwave systems [1]. They are also considered among the potential candidates for 5G indoor systems [3]. Previous work has shown that significant enhancements in the VLC system data rates can be achieved by replacing LEDs with LDs coupled with the use of an imaging receiver instead of the conventional wide field of view (FOV) receiver [4], [5], [6]. A data rate of 10 Gbps in a realistic environment has been shown to be possible with a VLC system when a delay adaptation technique in conjunction with laser diodes and imaging receiver were used with a simple modulation format (on-off keying, OOK) and without the use of relatively complex wavelength division multiplexing approaches [4]. Significant improvements were shown to be possible when a VLC relay assisted system is combined with an imaging receiver and a delay adaptation technique [7]. However, given typical parameters, the latter system cannot provide a throughput beyond 10 Gbp...

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“…Moreover, a VLC relay assisted system is used with a delay adaptation technique and an imaging receiver to further improve the VLC system performance [11]. These efforts aim to achieve the highest data rates possible.…”

Section: Introductionmentioning

confidence: 99%

Uplink design in VLC systems with IR sources and beam steering

2017

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The need for high-speed local area networks to meet the recent developments in multimedia and video transmission applications has recently focused interest on visible light communication (VLC) systems. Although VLC systems provide lighting and communications simultaneously from light emitting diodes, LEDs, the uplink channel design in such a system is a challenging task. In this paper, we propose a solution in which the uplink challenge in indoor VLC is resolved by the use of an Infrared (IR) link. We introduce a novel fast adaptive beam steering IR system (FABS-IR) to improve the uplink performance at high data rates while providing security for applications. The goal of our proposed system is to enhance the received optical power signal, speed up the adaptation process and mitigate the channel delay spread when the system operates at a high transmission rate. The channel delay spread is minimised from 0.22 ns given by hybrid diffuse IR link to almost 0.07 ns. At 2.5 Gb/s, our results show that the imaging FABS-IR system accomplished about 11.7 dB signal to noise ratio (SNR) in the presence of multipath dispersion, receiver noise and transmitter mobility.Index Terms-uplink channel, beam steering IR, delay spread, SNR.

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10 Gbps Mobile Visible Light Communication System Employing Angle Diversity, Imaging Receivers, and Relay Nodes

Cited by 80 publications

References 48 publications

Fast and Efficient Adaptation Techniques for Visible Light Communication Systems

Fast and Efficient Adaptation Techniques for Visible Light Communication Systems

25 Gbps mobile visible light communication system employing fast adaptation techniques

Uplink design in VLC systems with IR sources and beam steering

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