coherent optical ofdm modem design with the aid of...
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Coherent Optical OFDM Modem Design with the Aid of ANN Equalizers The research aim is to design and optimize a CO-OFDM and to study the
modem performance after utilizing ANN equalizer.
Publications
M.A. Jarajreh, Z. Ghassemlooy, W.P. Ng, Improving the chromatic dispersion
tolerance in long-haul fibre links using the coherent optical orthogonal
frequency division multiplexing, Microwaves, Antennas & Propagation, IET.
06/2010;
M. A. Jarajreh, J. L. Wei, J. M. Tang, Z. Ghassemlooy, W. P. Ng, Effect of number
of sub-carriers, cyclic prefix and analogue to digital converter parameters on
coherent optical orthogonal frequency division multiplexing modem's
transmission performance, Communications, IET. 01/2010; 4:213-222.
M.A. Jarajreh, Z. Ghassemlooy, W. P. Ng, Improving the chromatic dispersion
tolerance in long-haul fibre links using the coherent OOFDM, Mosharaka
International Conference on Communications, Propagation and Electronics (MIC-
CPE 2009); 01/2009
M A Jarajreh and J M Tang, Improved Transmission Performance of Coherent
Optical OFDM Signals by Increasing The Number of Sub-Carriers, Semiconductor
& Integrated Optoelectronics (IEE/SIOE), Cardiff, Wales, April 2008.
M. A. Jarajreh, E. Giacoumidis, and J. M. Tang, ―Quantization and Clipping
Effects on the Transmission Performance of Coherent Optical OFDM Signals over
AWGN Channels‖, Semiconductor & Integrated Optoelectronics (IEE/SIOE),
Cardiff, Wales, April 2007.
E. Giacoumidis, M. A. Jarajreh, and J. M. Tang, ―Effect of Analogue-to-Digital
Conversion on the Performance of Optical OFDM Modems in Coherent and
IMDD Transmission Links‖, Semiconductor & Integrated Optoelectronics
(IEE/SIOE), Cardiff, Wales, April 2007.
Mutsam Jarajreh
Mutsam Jarajreh is currently pursuing a
PhD degree at the school of Northumbria
Communications Research Lab (NCRLab)
at Computing, Engineering and
Information Sciences, Northumbria
University, UK,; where he is involved in
coherent optical OFDM for long haul
transmission, Fast-coherent optical
OFDM, equalization techniques for OFDM
optical system.
Mr. Jarajreh has obtained a BEng and
MSc Computer and Network Engineering
from Sheffield Hallam University in the
years 2004 and 2005 respectively.
R&D communications
Mr. Lei Liu
Ph.D. 3rd year Student
EBE409, Ellison Building, CEIS, Northumbria
University at Newcastle upon Tyne, UK.
NE1 8ST
Phone: 07883860657
Lei Liu received the BSc degree in
Computer Science from Nanjing
University of Posts and
Telecommunications at Nanjing, China in
2007 and the MSc degree in
Microelectronic and communication
engineering from Northumbria University
at Newcastle upon Tyne, UK in 2009.
Currently, he is a PhD student at the
School of Computing, Engineering &
Information Sciences, Northumbria
University at Newcastle upon Tyne, UK.
He is carrying out research on
optimisation of active integrated
antennas (AIA) using Genetic Algorithm.
He is also investigating into the design of
a RF link which is to be used as a backup
for an optical communication link.
Application of Genetic Algorithm to Obtain a High Efficient Active Integrated Antenna using an Aperture Coupled Microstrip Patch Antenna Researches concentrate on:
Radio Frequency communication
Aperture coupled slot antenna modeling and design
High efficiency power amplifier modeling and design (Class
F and inverse F)
Optimization method (Genetic Algorithm)
Main original contributions:
Practical test for turn ratio between feed and slot, slot and
patch
Single feed narrow and wideband microstrip slot antenna
design; dual freq. microstrip slot antenna design; circular
polarized microstrip slot antenna design
Research outputs:
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Indoor cellular optical wireless communication systems
Main original contributions Mathematical modelling cellular indoor OWC links.
Optimization of beam pattern.
Handover algorithm and practical implementation.
Main goals The main aim of this cellular indoor OWC system is to investigate those key challenges that need addressing including mobility and moving within and between cells without losing connection. In addition investigation of efficient modulation and coding schemes, improving BER, high data rate, eye safe, and coverage are desirable to enhance the performance of the system. Furthermore multiple access protocol and networking perspectives are essential for future development of this type of networks, which are currently in point-to-point configuration.
Publications (1). D. Wu, Z. Ghassemlooy, S. Rajbhandari, and H. Le Minh, “ Channel characteristics analysis and experimental demonstration of a diffuse cellular indoor visible light communication systems, " The Mediterranean Journal of Electronics and Communications , 2012. (accepted) (2). D. Wu, Z. Ghassemlooy, H. Le Minh, Sujan Rajbhandari, and Anthony C. Boucouvalas, “Improvement of the transmission bandwidth for indoor optical wireless communication systems using a diffused Gaussian beam, " IEEE Communication Letters, 2012. (accepted) (3). D. Wu, Z. Ghassemlooy, H. Le Minh, and S. Rajbhandari, "Power distribution investigation of a diffused cellular indoor visible light communications system," in PGNET2011, Liverpool , UK, 2011. (4). D. Wu, Z. Ghassemlooy, H. Le Minh, S. Rajbhandari, and Y. S. Kavian, "Power distribution and q-factor analysis of diffuse cellular indoor visible light communication systems," in European Conference on Networks and Optical Communications (NOC), Newcastle Upon Tyne UK, 2011. (5). D. Wu, Z. Ghassemlooy, H. Le Minh, S. Rajbhandari, and C. Lu, "Channel characteristics analysis of diffuse indoor cellular optical wireless communication systems," Proc. of SPIE, vol. 8309, 2011. (6). D. Wu, Z. Ghassemlooy, H. Le Minh, S. Rajbhandari , and W. Lim., , “Optimisation of transmission bandwidth for indoor cellular OWC systems using a dynamic handover dicision-making algorithm,“ Proceeding of the 8th Symposium on Communication Systems, Networks and Digital Signal Processing 2012 (CSNDSP 2012), Poznan, Poland, 2012; (Accepted)
Mr. Dehao Wu
Ph.D. 3rd year Student
[email protected] Room E409 Ellison Building Tel: +44 (0) 191 227 4331
He received the Bachelor’s degree in optical and information engineering from the Nanjing University of Post & Telecommunication, P.R. China in 2007 and the M.Sc. degree in microelectrical and telecommunication engineering from Northumbria University, Newcastle, U.K., in 2009. Now he is working towards the Ph.D. degree on indoor cellular optical wireless communication systems in Optical Communication Research Group at Northumbria University. His research interests include the area of optical wireless communications, indoor optical wireless and visible light communications.
R&D communications
Free-Space Optical Comm System -space optical (FSO) communications is poised to become a promising broadband wireless access candidate to resolve the existing “last mile” problems, due to its superior characteristics which include: no licensing requirements or tariffs for utilization, capability of achieving a very high aggregate capacity, reduced interference, high security, cost-effectiveness and simplicity of system design.
Aims and Objectives: Channel modelling, performance analysis and optimization of
FSO systems Optimization of hybrid FSO/RF systems Application of FSO communications for urban optical wireless
communications and green wireless backhauling in next generation Metrozones
Publications: [1] I. E. Lee, Z. Ghassemlooy, W. P. Ng, and S. Rajbhandari, “Fundamental analysis of hybrid free
space optical and radio frequency communication systems”, in Proc. Annual Post Graduate Symposium on the Convergence of Telecommunications, Networking and Broadcasting (PGNet2011), Liverpool , UK, 2011.
[2] I. E. Lee, M. L. Sim, and F. W. L. Kung, “A dual-receiving visible-light communication system under time-variant non-clear sky channel for intelligent transportation system”, in Proc. European Conference on Networks and Optical Communications (NOC2011), Newcastle Upon Tyne UK, 2011.
[3] I. E. Lee, Z. Ghassemlooy, W. P. Ng, and M. Uysal, “Performance analysis of free space optical links over turbulence and misalignment induced fading channels”, in Symposium on Communication Systems, Networks and Digital Signal Processing (CSNDSP 2012), Poznan, Poland, 2012, accepted.
[4] I. E. Lee, Z. Ghassemlooy, and W. P. Ng, “Effects of aperture averaging and beam width on Gaussian free space optical links in the presence of atmospheric turbulence and pointing error”, in International Conference on Transparent Optical Networks (ICTON 2012), Coventry, UK, 2012, accepted.
[5] I. E. Lee, Z. Ghassemlooy, W. P. Ng, and A. Khalighi, “Green-inspired hybrid FSO/RF wireless backhauling and basic access signalling for next generation Metrozones”, in International Symposium on Environment-Friendly Energies and Applications (EFEA 2012), Newcastle Upon Tyne UK, 2012, accepted.
[6] I. E. Lee, M. L. Sim, F. W. L. Kung, and Z. Ghassemlooy, “Statistical analysis and modelling of one-minute global solar irradiance for a tropical country”, in International Symposium on Environment-Friendly Energies and Applications (EFEA 2012), Newcastle Upon Tyne UK, 2012, accepted.
Single-input single-output FSO system
Hybrid FSO/RF system
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Ms. It Ee Lee
Ph.D. 2nd year Student
Room E411 Ellison Building School of Computing, Engineering & Information Sciences Northumbria University Newcastle upon Tyne, NE1 8ST, United Kingdom
It Ee Lee received the B.Eng. (Hons.) majoring in electronics and M.Eng.Sc. degrees from Multimedia University, Malaysia, in 2004 and 2009, respectively. Currently, she is working towards the Ph.D degree on FSO communication systems in the Optical Communication Research Group (OCRG) at Northumbria University.
Her research interests include channel modelling, performance analysis and optimization of FSO communication systems, hybrid FSO/RF systems, visible light communications (VLC) systems and optical wireless communications.
R&D communications
Modelling of free-space optical link for ground-to-train communications
In this work, mathematical modelling for ground-to-train
communications using free space optics technology is proposed
which enables high speed fibre like data connectivity for the train
passengers.
Main original contributions
Mathematical modelling using Gaussian/Lambertian source
Performance evaluation of the system
Prototype proof-of-concept demonstration
Eye-safety analysis for the system
Publications
PGNet 2010
IET Railway paper competition 2010
ConTel 2011
AH-ICI 2011
CSNDSP 2012
Rupak Paudel
PhD 3rd year Research Student
Received BEng in Electronics from
Tribhuvan University, Kathmandu,
Nepal in 2007.
Received MSc. in Optoelectronics and
Communications Engineering with
distinction from Northumbria
University in 2009.
Awarded Photon Fire Prize during his
MSc.
Joined the OCRG as a PhD student
with full studentship in 2010.
Awarded best poster, final year at the
University Conference 2012.
R&D communications
Experimental prototype
A novel wide area network model for mobile nodes supporting the fixed nodes in backbone photonic network Modern communication networks aim to deliver data at very high speed and low latency.
The project will investigate the novel WAN model of network migration where mobile nodes can be actively support the fixed nodes in routing.
It is including AI and green communication aspect.
Ms. Zina Abu Almaalie
PhD 1st year Student
Her scientific academic education is Master degree (M. Sc.) in Computer Engineering ,from University of Technology, Iraq in 2005 She is an Information Technology engineer, her experience in work make her the ability and potential to network management ,control the performance of networks and manage them compatible with the purpose of the requested. She has worked as an engineering in Iraqi Commission for Computer and Informatics, Baghdad .
R&D communications
High Speed Hybrid FSO/RF Communications
Research Interest
Free Space Optical (FSO) Systems
Millimeter Microwave (MMW) Systems
Hybrid RF/FSO communications
Numerical Methods in Electromagnetic and Wave Propagation
Photonic Crystal Structures
Artificial Intelligence
Mr. Mojtaba Mansour Abadi
PhD 1st year Student
LinkedIn: Mojtaba Mansour Abadi
Research Gate: Mojtaba Mansour Abadi
• BS degree in Electrical
Engineering, Branch of Electronics
from Islamic Azad University of
Fasa, Fasa, Iran in 2005
• MS degree in Telecommunication,
Branch of Microwave Engineering
from Khaje Nasir Toosi University,
Tehran, Iran in 2008
• Joining Northumbria University as
a PhD Student in 2012
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Mr. Thavamaran Kanesan
Ph.D. 3rd year student
Thavamaran.Kanesan @ northumbria.ac.uk
Thavamaran Kanesan received his
Bachelor’s Degree with Honours in
Electrical and Electronic from
Northumbria University, UK, in 2009,
where he is currently working
towards his PhD degree.
In the past two years of this PhD, he
has been prominently working on
3GPP Long Term Evolution (LTE) and
Radio-over-Fibre (RoF) system
integration.
4th Generation Long Term Evolution Mobile Network on Radio-over-Fibre Systems. Major Contributions
3GPP LTE-RoF Integration
Analytic Development of the impairment associated with laser
direct modulation.
Experimental Test-Bed for 3GPP LTE-RoF Integration
Selected Publications:
T. Kanesan, W. P. Ng, Z. Ghassemlooy, and J. Perez, “Optimization of Optical
Modulator for LTE RoF in Nonlinear Fibre Propagation”, IEEE Photonics
Technology Letters, vol. 24, pp. 617-619, 2012.
T. Kanesan, W. P. Ng, Z. Ghassemlooy, and C. Lu, “FFT Size Optimization for
LTE RoF in Nonlinear Fibre Propagation”, in IEEE 8th International
Symposium on Communication Systems Networks and Digital Signal
Processing (CSNDSP), 2012.
Experimental Setup:
Below is the LTE-RoF test-bed developed in the Agilent Photonics Laboratory located within the Northumbria University.
R&D communications
Adaptive Routing Protocol for Mobile Ad-hoc Networks
Description
The project aims to develop a routing protocol which adapts to the
change of mobile ad-hoc networks, improves the network
performance by applying the Artificial Intelligence integrated to the
protocol to make it more intelligent when routing.
Main original contributions
The main original contribution is applying the feedback mechanism
to help the Neuro-Fuzzy System or Dynamic Bayesian Networks to
control the routing protocol when routing the packet
Main goals
The goal is to improve the network performance in terms of
throughput and end-to-end delay. Moreover, it also helps to
manage the broadcast area efficiently.
System model
Mr. Tran The Son
PhD 1st year student
He was an engineer in Vietnam Telecom
International (VTI), 1998 – 2004.
Since 2004, he is a lecturer in Vietnam-
Korea IT College, VN.
My research interest are related to
Ad-hoc Networks,
Network Security.
Web Design
R&D communications
Mr Paul Anthony HAIGH PhD Candidate
Email: [email protected]
LinkedIn: http://uk.linkedin.com/pub/paul-anthony-haigh/28/489/685
Address: E409 Ellison Building, Northumbria University, NE1 8ST
Paul received the BEng (Hons) degree from Northumbria in ‘10 and from ‘10-’11 Paul was a Marie Curie Fellow (ACEOLE) at the European Organization for Nuclear Research (CERN). He worked on the ATLAS and CMS experiments researching methods to provide multi-gigabit communications in the presence of a large magnetic field. Paul is currently working towards obtaining the PhD degree and has initiated numerous international collaborations with a number of the world’s top institutions including Siemens AG Corporate Technology, Hong Kong Polytechnic University and University College London.
Member of Professional Institutions
Marie Curie Fellows Association SIEEE SOSA
Increasing Data Rates in Organic Optoelectronic Devices Original Contributions
Implementing simple and complex equalization schemes for organic optoelectronic devices to increase data rates.
Application of advanced signal processing techniques such as OFDM to enhance data rates in organic optoelectronics.
Parallel data transmission such as MIMO/MISO/SIMO in order to improve data rates in organic VLC.
First person to demonstrate all organic visible light communications system.
Real time processing using FPGA/LabVIEW.
Selected Publications P. A. Haigh, Z. Ghassemlooy, H. Le Minh, S. Rajbhandari, F. Arca, S. F. Tedde, O.
Hayden, and I. Papakonstantinou, "Exploiting Equalization Techniques for
Improving Data Rates in Organic Optoelectronic Devices for Visible Light
Communications," Journal of Lightwave Technology, IEEE, vol. [submitted], 2012.
P. A. Haigh, Z. Ghassemlooy, S. Rajbhandari, F. Arca, S. F. Tedde, O. Hayden, H. Le
Minh, and I. Papakonstantinou, "A 1 Mb/s Visible Light Communications Link with
a Low BW Organic Photodetector and Artificial Neural Network Equalization
Scheme," Optics Letters, OSA, [Submitted] 2012.
A. Burton, P. A. Haigh, H. Le Minh, Z. Ghassemlooy, S. Rajbhandari, and S. K.
Liaw, "A Comparative Investigation of Modulation and Equalization Techniques
for White Organic Light Emitting Diodes," IEEE Communications Magazine, vol.
[submitted], 2012.
R&D communications
Smart White LED Based Lighting and Communications My research involves the design and analysis of a smart visible light
communications receiver for enhanced mobility and guarding from
loss of signals through shadowing.
Main original contributions
New receiver layout and design
Using diffuse links in combination with line of sight in VLC to
overcome shadowing and blocking
Publications 1. A. Burton, C. Amiot, H. Le Minh and Z. Ghassemlooy, “Design of an integrated optical receiver for mobile visible light communications” 12th Annual Symposium on the Convergence of Telecommunications, Networking and Broadcasting, Liverpool, 2011, pp.286-289
2. H. Le Minh, Z. Ghassemlooy, A. Burton, and P. A. Haigh, "Equalization for organic Light Emitting Diodes in Visible Light Communications," accepted at the IEEE Global Communications Conference 2011 (IEEE GLOBECOM 2011), Workshop on Optical Wireless Communications in Houston, USA, 2011.
3. A. Burton, H. Le Minh , Z. Ghassemlooy, P. A. Haig “Smart Receiver for Visible Light Communications: Design and Analysis” CSNDSP 2012, Poland
4. A. Burton, H. Le Minh, Z. Ghassemlooy “Performance analysis for 180o receiver
in Visible Light Communications” IEEC 2012, Vietnam
5. A. Burton, P. A. Haigh, H. Le Minh, Z. Ghassemlooy, S. Rajbhandari, and S. K.
Liaw, "A Comparative Investigation of Modulation and Equalization Techniques
for White Organic Light Emitting Diodes," IEEE Communications Magazine, vol.
[submitted], 2012.
Mr. Andrew Burton
PhD Candidate
E409 Ellison Building
Northumbria University
NE1 8ST
Research Interests
Optical wireless communications Visible light communications Electronic hardware design Organic electronics
Andrew R. Burton received his Bachelor’s
degree in Electronics and
Communications Engineering from
Northumbria University in 2007.
Subsequently he was awarded an EPRSC
studentship to do an MSc in
Optoelectronics and Communications
Engineering to which he achieved a
distinction. In 2010 Andrew returned to
the school of engineering under to
undertake a fully funded PhD degree
through Northumbria University in the
field of optical wireless communications
(OWC).
R&D Communications
Efficient Modulation Technique for High Speed Radio over Fibre (RoF) Communication Systems Radio-over-Fibre (RoF) refers to a technique where by light is modulated
by a radio signal and transmitted over an optical link to facilitate wireless
access. It is in fact designed to improve the performance of a radio
system by providing higher bandwidth for mobile communications.
The significance of RoF systems is due to the fact that the RF spectrum is
congested with a significant number of communications channels.
Consequently, in order to respond to ever increasing demand for higher
data rate, using a higher frequency range is inevitable. Millimetre-wave
cannot be propagated in the air due to a significant fading effect, nor can
it be used in coaxial cables because of serious attenuation. RoF
systems are the perfect solution for future communication systems
since they bridge the gap between RF and Fibre optic communications.
My research topic is to propose a modulation scheme which can
modulate the light source in mm-wave frequency range in an efficient
and in a high speed manner.
Original contribution
Using Single drive MZM to generate optical MMW.
Investigating the effects of shot noise and thermal noise on RoF
Signal.
Investigating the effect of CD effects on the optical MMW signal.
Compensating the effects of the non-linear fibre model on the signal
using electrical equalization method.
Publications
PGNet 2010
London Communications Symposium 2010 (LCS)
NOC 2011
CSNDSP 2012
Mr. Arash Bahrami
PhD 3rd year Student
Arash Bahrami received his BEng (Hons)
in Electronic Communication Engineering
and MSc in Communication and Signal
Processing in 2007 and 2008 respectively
from Newcastle University, UK.
He joined the Optical Communication
Research group (OCRG), Northumbria
University in December 2009 and
currently on third year of his PhD
programme.
His supervision team are: Dr. Wai Pang
Ng, Prof. Z. Ghassemlooy, and Prof. C.
Qiao from University at Buffalo The State
University of New York, USA.
Research interest Optical Millimeter-wave generation Radio-over-Fibre systems High speed hybrid RF-Optical
Systems.
R&D communications
Muhammad Ijaz
Final year PhD student
Muhammad Ijaz has received his BSc (Hons)
Physics degree from Punjab University,
Lahore Pakistan in 2006. He has obtained his
M.Sc. in optoelectronic and communication
engineering degree from Northumbria
University, Newcastle, UK in 2009. After the
successful completion of his M.Sc., he has
been awarded partial Northumbria university
studentship to pursue his Ph.D. He is also a
part time lecturer at CEIS, Northumbria
University.
Partial Northumbria Studentship
Best performing 2nd –year PhD student at CEIS
Best Conference paper award (NOC 2011)
Research Interests
Free space optical communications Channel modeling for FSO Atmospheric effects on FSO Hybrid RF/FSO communications Digital Signal processing
Modulation Schemes
Mitigation of Fog and Scintillation Effects in Free Space Optics (FSO)
Communication Free space optics (FSO) communication uses visible or infrared (IR) wavelength energy to broadcast high data rates through the atmospheric channel. The advantages of FSO including a large un-regulated and license free transmission bandwidth spectrum, consumption of low power, low deployment cost, security as well as immunity to the electromagnetic interference. However, the constitutes of atmosphere particularly fog and turbulence hinders the FSO performance and availability due to the scattering, absorption and fluctuations of photon energy. In practice, it is very challenging to measure the effect of the atmosphere constituents like fog and turbulence under diverse conditions and locations. This is mainly due to the long waiting time to observe and experience reoccurrence of same atmospheric conditions. Therefore, we have developed a dedicated laboratory atmospheric chamber to investigate the effects of fog, smoke, temperature induced turbulence and wind on the propagating optical beam.
Main original contributions
Mitigation of Fog and turbulence effect by employing different optical communication power and different modulation schemes such as NRZ, RZ and PPM. The study and investigate the performance of the empirical fog models in the literature and to modify the existing models to a single model.
Publications
GLOBECOM 2010 , LCS 2010, IST 2010 NOC 2011 , CONTEL 2011 IEEE EL 2012, CSNDSP 2012, IEEE JLT 2012
Fans
Air Outlet
Fog Machine
Fan
Air Outlet
Power meters
Receiver End (Rx)
Laser End
(Tx)
The chamber with the controlled
amount of fog
(c)
R&D communications
System block diagram
Experimental setup