Paul Anthony Haigh - Profile on Academia.edu (original) (raw)
Papers by Paul Anthony Haigh
Development of visible light communication systems
Experimental Error Performance of Modulation Schemes Under a Controlled Laboratory Turbulence FSO Channel
Journal of Lightwave Technology, 2015
Numerical Analysis of Artificial Neural Network and Volterra-based Nonlinear Equalizers for Coherent Optical OFDM
Spectral Shape Impact of Nonlinear Compensator Signal in LTE RoF system
IEEE Photonics Technology Letters, 2015
ABSTRACT
5G networks have to offer extremely high capacity for novel streaming applications. One of the mo... more 5G networks have to offer extremely high capacity for novel streaming applications. One of the most promising approaches is to embed large numbers of co-operating small cells into the macro-cell coverage area. Alternatively, optical wireless based technologies can be adopted as an alternative physical layer offering higher data rates. Visible light communications (VLC) is an emerging technology for future high capacity communication links (it has been accepted to 5GPP) in the visible range of the electromagnetic spectrum (~370–780 nm) utilizing light-emitting diodes (LEDs) simultaneously provide data transmission and room illumination. A major challenge in VLC is the LED modulation bandwidths, which are limited to a few MHz. However, myriad gigabit speed transmission links have already been demonstrated. Non line-of-sight (NLOS) optical wireless is resistant to blocking by people and obstacles and is capable of adapting its’ throughput according to the current channel state information. Concurrently, organic polymer LEDs (PLEDs) have become the focus of enormous attention for solid-state lighting applications due to their advantages over conventional white LEDs such as ultra-low costs, low heating temperature, mechanical flexibility and large photoactive areas when produced with wet processing methods. This paper discusses development of such VLC links with a view to implementing ubiquitous broadcasting networks featuring advanced modulation formats such as orthogonal frequency division multiplexing (OFDM) or carrier-less amplitude and phase modulation (CAP) in conjunction with equalization techniques. Finally, this paper will also summarize the results of the European project ICT COST IC1101 OPTICWISE (Optical Wireless Communications - An Emerging Technology) dealing VLC and OLEDs towards 5G networks.
IEEE Journal on Selected Areas in Communications, 2015
We present recent progress on visible light communication systems using polymer light-emitting di... more We present recent progress on visible light communication systems using polymer light-emitting diodes as the transmitters and a commercial silicon photodetector as the receiver. In this work we use transmitters at red, green and blue wavelengths to investigate the maximum on-off keying link performance of each device type as the first steps towards a wavelength-division multiplexed link. We show that a total transmission speed of 13 Mb/s is achievable when considering the raw bandwidth of each of the RGB PLEDs. Such a rate represents a 30% gain over previously demonstrated systems. Further capacity improvement can be achieved using high performance artificial neural network equalizer offering a realistic prospect for transmission speeds up to 54.9 Mb/s.
A Multi-CAP Visible Light Communications System with 4.85 b/s/Hz Spectral Efficiency
IEEE Journal on Selected Areas in Communications, 2015
ABSTRACT In this paper we experimentally demonstrate a multiband carrier-less amplitude and phase... more ABSTRACT In this paper we experimentally demonstrate a multiband carrier-less amplitude and phase modulation format for the first time in VLC. We split a conventional carrier-less amplitude and phase modulated signal into m subcarriers in order to protect from the attenuation experienced at high frequencies in low-pass VLC systems. We investigate the relationship between throughput/spectral efficiency and m, where m = {10, 8, 6, 4, 2, 1} subcarriers over a fixed total signal bandwidth of 6.5 MHz. We show that transmission speeds (spectral efficiencies) of 31.53 (4.85), 30.88 (4.75), 25.40 (3.90), 23.65 (3.60), 15.78 (2.40), 9.04 (1.40) Mb/s (b/s/Hz) can be achieved for the listed values of m, respectively. Access: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7112468&filter%3DAND%28p_IS_Number%3A7206775%29
Visible light communications is a technology with enormous potential for a wide range of applicat... more Visible light communications is a technology
with enormous potential for a wide range of
applications within next generation transmission
and broadcasting technologies. VLC offers
simultaneous illumination and data communica-
tions by intensity modulating the optical power
emitted by LEDs operating in the visible range
of the electromagnetic spectrum (~370–780
nm). The major challenge in VLC systems to
date has been in improving transmission speeds,
considering the low bandwidths available with
commercial LED devices. Thus, to improve the
spectral usage, the research community has
increasingly turned to advanced modulation for-
mats such as orthogonal frequency-division mul-
tiplexing. In this article we introduce a new
modulation scheme into the VLC domain; multi-
band carrier-less amplitude and phase modula-
tion (m-CAP) and describe in detail its
performance within the context of bandlimited
systems.
In this paper we experimentally demonstrate a 10 Mb/s error free visible light communications (VL... more In this paper we experimentally demonstrate a 10 Mb/s error free visible light communications (VLC) system using polymer light-emitting diodes (PLEDs) for the first time. The PLED under test is a blue emitter with ∼600 kHz bandwidth. Having such a low bandwidth means the introduction of an intersymbol interference (ISI) induced penalty at higher transmission speeds and thus the requirement for an equalizer. In this work we improve on previous literature by implementing a decision feedback equalizer, rather than a linear equalizer. Considering 7% and 20% forward error correction codes, transmission speeds up to ∼12 Mb/s can be supported.
Journal of Lightwave Technology, 2015
Visible light communications (VLC) is a new emerging technology, which provides both data transmi... more 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.
Optical Fiber Communication Conference, 2015
We demonstrate an effective decision-directed-free blind phase noise compensation method for CO-O... more We demonstrate an effective decision-directed-free blind phase noise compensation method for CO-OFDM transmission. By applying this technique, the common phase error can be accurately estimated using as few as three test phases.
Optical Fiber Communication Conference, 2015
A multi-band CAP system is experimentally demonstrated for the first time in VLC. We show that wi... more A multi-band CAP system is experimentally demonstrated for the first time in VLC. We show that with an 8-CAP testbed spectral efficiencies (~4.75 b/s/Hz) at a realistic distance of 1 m can be reached. O CIS codes: (060.2605) Free-space optical communication; (170.4090) Modulation techniques 1. Introducti on Severe bandwidth limitation introduced by light-emitting diodes (LEDs) is the major bottleneck in high-capacity visible light communications (VLC) [1]
Using Equalizers to Increase Data Rates in Organic Photonic Devices for Visible Light Communications Systems
Optical Fiber Communication Conference, 2014
The first 10 Mb/s real-time organic visible light communications system based on polymer light-em... more The first 10 Mb/s real-time organic visible light communications system based on polymer light-emitting diodes is demonstrated using a Virtex-6 FPGA-based LMS equalizer, with an improvement rate of 7 Mb/s compared to the current state-of-the-art.
Experimental Error Performance of Modulation Schemes Under a Controlled Laboratory Turbulence FSO Channel
Journal of Lightwave Technology, 2015
The field of organic visible light communications is rapidly gaining interest in the research com... more The field of organic visible light communications is rapidly gaining interest in the research community as a standalone technology in optical wireless communications. Organic small molecule and polymer photonic devices are the focus of wide ranging research due to fascinating characteristics such as mechanical flexibility and extremely low cost solution based processing. On the other hand, charge transport mobility in organic semiconductors is orders of magnitude lower than in inorganics, resulting in corresponding bandwidth limitations and generating a major challenge for increasing transmission speeds. Recently, however, data rates have been demonstrated at Ethernet speeds (10 Mb/s) for the first time. In order to reach such transmission speeds we reported several substantial steps of progress in the literature which will be reviewed in this work.
![Research paper thumbnail of Visible light communications: 375 Mbits/s data rate with a 160 kHz bandwidth organic photodetector and artificial neural network equalization [Invited]](https://attachments.academia-assets.com/53592985/thumbnails/1.jpg)
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2013 IEEE International Conference on Communications (ICC), 2013
This paper presents the first ever experimental demonstration of a multiple-input multiple-output... more This paper presents the first ever experimental demonstration of a multiple-input multiple-output (MIMO) visible light communications system employing four silicon (Si) light emitting diodes (LEDs) and four organic photodetectors (OPDs) as transmitters and receivers, respectively. The proposed link is relatively low cost and it employs the on-off keying (OOK) modulation format offering a data rate of 200 kb/s without the need for equalization, which is a significant increase compared with previous non-equalized systems. In order to speed up date rates further, we implement an artificial neural network (ANN) to classify the signal and correct the error induced by the matrix inversion at the receiver, allowing a gross bit rate of 1.8 Mb/s in the best case.
Online artificial neural network equalization for a visible light communications system with an organic light emitting diode based transmitter
Proceedings of the 2013 18th European Conference on Network and Optical Communications & 2013 8th Conference on Optical Cabling and Infrastructure (NOC-OC&I), 2013
Opt. Express, 2014
This paper presents new experimental results on a polymer light-emitting diode based visible ligh... more This paper presents new experimental results on a polymer light-emitting diode based visible light communications system. For the first time we demonstrate a 10 Mb/s link based on the on-off keying data format with real time equalization on a field programmable gate array. The 10 Mb/s transmission speed is available at a bit error rate less than 4.6 × 10 -3 , which is the limit for forward error correction. At a BER of 10 -6 a transmission speed of 7 Mb/s is readily achievable.
Development of visible light communication systems
Experimental Error Performance of Modulation Schemes Under a Controlled Laboratory Turbulence FSO Channel
Journal of Lightwave Technology, 2015
Numerical Analysis of Artificial Neural Network and Volterra-based Nonlinear Equalizers for Coherent Optical OFDM
Spectral Shape Impact of Nonlinear Compensator Signal in LTE RoF system
IEEE Photonics Technology Letters, 2015
ABSTRACT
5G networks have to offer extremely high capacity for novel streaming applications. One of the mo... more 5G networks have to offer extremely high capacity for novel streaming applications. One of the most promising approaches is to embed large numbers of co-operating small cells into the macro-cell coverage area. Alternatively, optical wireless based technologies can be adopted as an alternative physical layer offering higher data rates. Visible light communications (VLC) is an emerging technology for future high capacity communication links (it has been accepted to 5GPP) in the visible range of the electromagnetic spectrum (~370–780 nm) utilizing light-emitting diodes (LEDs) simultaneously provide data transmission and room illumination. A major challenge in VLC is the LED modulation bandwidths, which are limited to a few MHz. However, myriad gigabit speed transmission links have already been demonstrated. Non line-of-sight (NLOS) optical wireless is resistant to blocking by people and obstacles and is capable of adapting its’ throughput according to the current channel state information. Concurrently, organic polymer LEDs (PLEDs) have become the focus of enormous attention for solid-state lighting applications due to their advantages over conventional white LEDs such as ultra-low costs, low heating temperature, mechanical flexibility and large photoactive areas when produced with wet processing methods. This paper discusses development of such VLC links with a view to implementing ubiquitous broadcasting networks featuring advanced modulation formats such as orthogonal frequency division multiplexing (OFDM) or carrier-less amplitude and phase modulation (CAP) in conjunction with equalization techniques. Finally, this paper will also summarize the results of the European project ICT COST IC1101 OPTICWISE (Optical Wireless Communications - An Emerging Technology) dealing VLC and OLEDs towards 5G networks.
IEEE Journal on Selected Areas in Communications, 2015
We present recent progress on visible light communication systems using polymer light-emitting di... more We present recent progress on visible light communication systems using polymer light-emitting diodes as the transmitters and a commercial silicon photodetector as the receiver. In this work we use transmitters at red, green and blue wavelengths to investigate the maximum on-off keying link performance of each device type as the first steps towards a wavelength-division multiplexed link. We show that a total transmission speed of 13 Mb/s is achievable when considering the raw bandwidth of each of the RGB PLEDs. Such a rate represents a 30% gain over previously demonstrated systems. Further capacity improvement can be achieved using high performance artificial neural network equalizer offering a realistic prospect for transmission speeds up to 54.9 Mb/s.
A Multi-CAP Visible Light Communications System with 4.85 b/s/Hz Spectral Efficiency
IEEE Journal on Selected Areas in Communications, 2015
ABSTRACT In this paper we experimentally demonstrate a multiband carrier-less amplitude and phase... more ABSTRACT In this paper we experimentally demonstrate a multiband carrier-less amplitude and phase modulation format for the first time in VLC. We split a conventional carrier-less amplitude and phase modulated signal into m subcarriers in order to protect from the attenuation experienced at high frequencies in low-pass VLC systems. We investigate the relationship between throughput/spectral efficiency and m, where m = {10, 8, 6, 4, 2, 1} subcarriers over a fixed total signal bandwidth of 6.5 MHz. We show that transmission speeds (spectral efficiencies) of 31.53 (4.85), 30.88 (4.75), 25.40 (3.90), 23.65 (3.60), 15.78 (2.40), 9.04 (1.40) Mb/s (b/s/Hz) can be achieved for the listed values of m, respectively. Access: http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=7112468&filter%3DAND%28p_IS_Number%3A7206775%29
Visible light communications is a technology with enormous potential for a wide range of applicat... more Visible light communications is a technology
with enormous potential for a wide range of
applications within next generation transmission
and broadcasting technologies. VLC offers
simultaneous illumination and data communica-
tions by intensity modulating the optical power
emitted by LEDs operating in the visible range
of the electromagnetic spectrum (~370–780
nm). The major challenge in VLC systems to
date has been in improving transmission speeds,
considering the low bandwidths available with
commercial LED devices. Thus, to improve the
spectral usage, the research community has
increasingly turned to advanced modulation for-
mats such as orthogonal frequency-division mul-
tiplexing. In this article we introduce a new
modulation scheme into the VLC domain; multi-
band carrier-less amplitude and phase modula-
tion (m-CAP) and describe in detail its
performance within the context of bandlimited
systems.
In this paper we experimentally demonstrate a 10 Mb/s error free visible light communications (VL... more In this paper we experimentally demonstrate a 10 Mb/s error free visible light communications (VLC) system using polymer light-emitting diodes (PLEDs) for the first time. The PLED under test is a blue emitter with ∼600 kHz bandwidth. Having such a low bandwidth means the introduction of an intersymbol interference (ISI) induced penalty at higher transmission speeds and thus the requirement for an equalizer. In this work we improve on previous literature by implementing a decision feedback equalizer, rather than a linear equalizer. Considering 7% and 20% forward error correction codes, transmission speeds up to ∼12 Mb/s can be supported.
Journal of Lightwave Technology, 2015
Visible light communications (VLC) is a new emerging technology, which provides both data transmi... more 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.
Optical Fiber Communication Conference, 2015
We demonstrate an effective decision-directed-free blind phase noise compensation method for CO-O... more We demonstrate an effective decision-directed-free blind phase noise compensation method for CO-OFDM transmission. By applying this technique, the common phase error can be accurately estimated using as few as three test phases.
Optical Fiber Communication Conference, 2015
A multi-band CAP system is experimentally demonstrated for the first time in VLC. We show that wi... more A multi-band CAP system is experimentally demonstrated for the first time in VLC. We show that with an 8-CAP testbed spectral efficiencies (~4.75 b/s/Hz) at a realistic distance of 1 m can be reached. O CIS codes: (060.2605) Free-space optical communication; (170.4090) Modulation techniques 1. Introducti on Severe bandwidth limitation introduced by light-emitting diodes (LEDs) is the major bottleneck in high-capacity visible light communications (VLC) [1]
Using Equalizers to Increase Data Rates in Organic Photonic Devices for Visible Light Communications Systems
Optical Fiber Communication Conference, 2014
The first 10 Mb/s real-time organic visible light communications system based on polymer light-em... more The first 10 Mb/s real-time organic visible light communications system based on polymer light-emitting diodes is demonstrated using a Virtex-6 FPGA-based LMS equalizer, with an improvement rate of 7 Mb/s compared to the current state-of-the-art.
Experimental Error Performance of Modulation Schemes Under a Controlled Laboratory Turbulence FSO Channel
Journal of Lightwave Technology, 2015
The field of organic visible light communications is rapidly gaining interest in the research com... more The field of organic visible light communications is rapidly gaining interest in the research community as a standalone technology in optical wireless communications. Organic small molecule and polymer photonic devices are the focus of wide ranging research due to fascinating characteristics such as mechanical flexibility and extremely low cost solution based processing. On the other hand, charge transport mobility in organic semiconductors is orders of magnitude lower than in inorganics, resulting in corresponding bandwidth limitations and generating a major challenge for increasing transmission speeds. Recently, however, data rates have been demonstrated at Ethernet speeds (10 Mb/s) for the first time. In order to reach such transmission speeds we reported several substantial steps of progress in the literature which will be reviewed in this work.
2013 IEEE International Conference on Communications (ICC), 2013
This paper presents the first ever experimental demonstration of a multiple-input multiple-output... more This paper presents the first ever experimental demonstration of a multiple-input multiple-output (MIMO) visible light communications system employing four silicon (Si) light emitting diodes (LEDs) and four organic photodetectors (OPDs) as transmitters and receivers, respectively. The proposed link is relatively low cost and it employs the on-off keying (OOK) modulation format offering a data rate of 200 kb/s without the need for equalization, which is a significant increase compared with previous non-equalized systems. In order to speed up date rates further, we implement an artificial neural network (ANN) to classify the signal and correct the error induced by the matrix inversion at the receiver, allowing a gross bit rate of 1.8 Mb/s in the best case.
Online artificial neural network equalization for a visible light communications system with an organic light emitting diode based transmitter
Proceedings of the 2013 18th European Conference on Network and Optical Communications & 2013 8th Conference on Optical Cabling and Infrastructure (NOC-OC&I), 2013
Opt. Express, 2014
This paper presents new experimental results on a polymer light-emitting diode based visible ligh... more This paper presents new experimental results on a polymer light-emitting diode based visible light communications system. For the first time we demonstrate a 10 Mb/s link based on the on-off keying data format with real time equalization on a field programmable gate array. The 10 Mb/s transmission speed is available at a bit error rate less than 4.6 × 10 -3 , which is the limit for forward error correction. At a BER of 10 -6 a transmission speed of 7 Mb/s is readily achievable.