A 20-Mb/s VLC Link With a Polymer LED and a Multilayer Perceptron Equalizer

Haigh, Paul Anthony; Bausi, Francesco; Kanesan, Thavamaran; Le, Son Thai; Rajbhandari, Sujan; Ghassemlooy, Zabih; Papakonstantinou, Ioannis; Popoola, Wasiu O.; Burton, Andrew; Minh, Hoa Le; Ellis, A.D.; Cacialli, Franco

doi:10.1109/lpt.2014.2343692

Cited by 28 publications

(35 citation statements)

References 14 publications

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“…All the parameters were determined as outlined above, and following the simulation the worst possible case was chosen to represent a given scenario. (4, 6), (8,6) To illustrate the movement of the people within the room we have used the movement map for all three scenarios (see …”

Section: B Mobility Of Peoplementioning

confidence: 99%

“…Achieving higher data rate transmission is one of the key research challenges in VLC [5,6]. Concurrently, new technologies has emerged for indoor VLC applications like organic LEDs (OLEDs) representing an alternative light source to Ce:YAG/GaN LEDs, offering lower cost, a range of flat panel shapes and sizes with much smoother lighting effects due to the solution based processing technology [7,8]. VLC systems are expected to mainly be utilized for the indoor environment.…”

Section: Introductionmentioning

confidence: 99%

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Channel Characteristics of Visible Light Communications Within Dynamic Indoor Environment

Chvojka

Zvánovec

Haigh

et al. 2015

J. Lightwave Technol.

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149

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Visible light communications (VLC) is a new emerging technology, which provides both data transmission and illumination by utilizing the visible range (370 780 nm) of the electromagnetic spectrum. In order to maximize the available data rate and enhance the users mobility within an indoor environment, it is essential to characterize the communication channel. In this paper we present both analytical and experimental results for a VLC system affected by movement of people for different indoor conditions (i.e. furnished office room, empty hall and corridor). VLC systems utilize multiple light-emitting diodes mounted in the ceiling and the configuration is based on the non-directed line of sight. We consider random movement of people within the room, focusing on the impacts of shadowing and blocking on mobility and link system performance by investigating changes in the channel characteristics using the cumulative distribution function of the received power distribution and the delay profile. We demonstrate the behaviour of communication channels for different scenarios from corridor, the most robust against people movement induced fading, to the office rooms and halls, the most vulnerable to the received power fluctuation.

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Section: B Mobility Of Peoplementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Channel Characteristics of Visible Light Communications Within Dynamic Indoor Environment

Chvojka

Zvánovec

Haigh

et al. 2015

J. Lightwave Technol.

Self Cite

149

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show abstract

“…A breakthrough in organic VLC was made in [22], where PLEDs were used to demonstrate transmission speeds in excess of that required for Ethernet connectivity. The data rate of 20 Mb/s was reported in [22], [23] using OOK format and an MLP equalizer.…”

Section: Organic Ledsmentioning

confidence: 99%

“…The data rate of 20 Mb/s was reported in [22], [23] using OOK format and an MLP equalizer. More recently in [17], an aggregated transmission speed of 55 Mb/s was experimentally demonstrated and was achieved using an RGB PLED and WDM, which is a promising improvement for future research activities.…”

Section: Organic Ledsmentioning

confidence: 99%

Visible Light Communications towards 5G

Zvánovec¹,

Chvojka²,

Haigh³

et al. 2015

RADIOENGINEERING

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“…As a bottleneck in conventional indoor VLC systems, the bandwidth of LEDs has been increased by using post-and pre-equalization schemes [6][7]. In [6] a least mean squares (LMS) equalizer in real time with a field programmable gate array was reported.…”

Section: Introductionmentioning

confidence: 99%

Efficient frequency‐domain channel equalisation methods for OFDM visible light communications

et al. 2017

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Abstract:We present efficient frequency domain channel estimation methods based on the intra-symbol frequency-domain averaging (ISFA), minimum mean squared error (MMSE) and weighted inter-frame averaging (WIFA) schemes for the orthogonal frequency division multiplexing (OFDM) visible light communications (VLC) system. OFDM-VLC with quadrature phase shift keying, 16-and 64-quadrature amplitude modulation mapping is experimentally demonstrated. Compared with the conventional least square channel estimation method, ISFA, MMSE and WIFA offer improved performance with MMSE offering the best performance in term of the error vector magnitude but at the cost of high complexity. We show that the WIFA can improve the estimation accuracy of time-varying VLC optical channel.

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A 20-Mb/s VLC Link With a Polymer LED and a Multilayer Perceptron Equalizer

Cited by 28 publications

References 14 publications

Channel Characteristics of Visible Light Communications Within Dynamic Indoor Environment

Channel Characteristics of Visible Light Communications Within Dynamic Indoor Environment

Visible Light Communications towards 5G

Efficient frequency‐domain channel equalisation methods for OFDM visible light communications

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