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
Mutsam Jarajreh
frequency division multiplexing, Microwaves, Antennas & Propagation, IET.
Mutsam.jarajreh@northumbria.ac.uk
06/2010;
 M. A. Jarajreh, J. L. Wei, J. M. Tang, Z. Ghassemlooy, W. P. Ng, Effect of number
Mutsam Jarajreh is currently pursuing a PhD
of sub-carriers, cyclic prefix and analogue to digital converter parameters on
degree
coherent
at
the
Communications
school
of
Research
Lab
Northumbria
(NCRLab)
at
Computing, Engineering and Information Sciences,
Northumbria University, UK,; where he is involved
in
coherent
transmission,
optical
OFDM
Fast-coherent
for
long
optical
haul
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.
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 (MICCPE 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.
R&D communications
Application of Genetic Algorithm to Obtain a High
Efficient Active Integrated Antenna using an Aperture
Coupled Microstrip Patch Antenna
Researches concentrate on:




Lei Liu (PhD)

Address: EBE409, Ellison Building,
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
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.
R&D communications
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 Algorism)
Setups and photos, descriptions
Indoor cellular optical wireless communication systems
Main original contributions



Mathematical modelling cellular indoor OWC links.
Optimization of beam pattern.
Handover algorithm and practical implementation.
Mr. Dehao Wu
Main goals
3rd Year Ph.D Student
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.
Room E409 Ellison Building
Northumbria Communications Research lab
School of Computing,
Information Sciences,
Engineering
&
University of Northumbria, Newcastle upon
Tyne, NE1 8ST, UK.
Tel: +44 (0) 191 227 4331
Email: dehao.wu@northumbria.ac.uk
Bio and Research Interest
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
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 qfactor 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 dicisionmaking algorithm,“ Proceeding of the 8th Symposium on Communication Systems, Networks and
Digital Signal Processing 2012 (CSNDSP 2012), Poznan, Poland, 2012; (Accepted)
Free-Space Optical Communication System
The evolution of the wireless communications standards into the fourth
generation has witnessed recent rapid progress in information and
communication technologies, which resulted in severe congestion of the radio
frequency (RF) spectrum and wireless traffic bottleneck. Free-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:



It Ee Lee
Publications:
PhD Student (Year 2)
[1]
Contact Details:
[2]
Room E411 Ellison Building
School of Computing, Engineering &
Information Sciences
Northumbria University
Newcastle upon Tyne, NE1 8ST, United
Kingdom
Tel: +44 (0) 191 227 4331
Email: it.ee.lee@northumbria.ac.uk
Biography:
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.
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
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.
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.
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.
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.
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.
I. E. Lee, M. L. Sim, F. W. L. Kung, and Z. Ghassemlooy, “Statistical analysis and modelling of oneminute global solar irradiance for a tropical country”, in International Symposium on
Environment-Friendly Energies and Applications (EFEA 2012), Newcastle Upon Tyne UK, 2012,
accepted.
[3]
[4]
[5]
[6]
Finite
Gaussian
Lens
Optical
Laser
Input
OOK
Modulation
w0
wL
OOK
Demodulation
D
Output
Atmospheric
Channel h  hl ha hp
L
Single-input single-output FSO system
FSO Link
m1
s
Channel
Encoder
c1
OOK
Modulation
x1
Sub-Channel 1 py 1 x1 ;a1 
Information
Source
m2
y1
OOK
Demodulation
ĉ1
Channel
Decoder
Channel
Encoder
c2
Direct Digital
Modulation
x2
Sub-Channel 2 py 2 x 2 ; a2 
m̂1
Information
Sink
RF Link
Hybrid FSO/RF system
R&D communications
Photo
detector
y2
Direct Digital
Demodulation
ĉ 2
Channel
Decoder
m̂ 2
ŝ
A novel wide area network model
for mobile nodes supporting the
fixed nodes in backbone photonic
network
Mrs Zina Abu Almaalie
PhD Student (Year 1)
Contact Details:
Room E411 Ellison Building
School of Computing, Engineering &
Information Sciences
Northumbria University
Newcastle upon Tyne, NE1 8ST, United
Kingdom
zina.almaalie@northumbria.ac.uk
Biography:
The scientific academic education is Master
degree (M. Sc.) in Computer Engineering,
from University of Technology, Iraq in 2005
I’m an Information Technology engineer,
my experience in work make me the ability
and potential to network management,
control the performance of networks and
manage them compatible with the purpose of
the requested. I have worked as engineering
in Iraqi Commission for Computer and
Informatics, Baghdad.
R&D communications
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.
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

Thavamaran Kanesan
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
Final year PhD student
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
E411, Ellison Building,
a dedicated laboratory atmospheric chamber to investigate the effects of fog, smoke,
Northumbria University, NE1 8ST,
temperature induced turbulence and wind on the propagating optical beam.
Newcastle upon Tyne, United Kingdom.
Main original contributions
Thavamaran.Kanesan @ northumbria.ac.uk

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
System block diagram and experimental setup
Receiver End (Rx)
Fan
Air Outlet
Power meters
Air Outlet
Fog Machine
Fans
Laser End
(Tx)
System block diagram
R&D communications
The chamber with the controlled
amount of fog
(c)
Experimental setup
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,
Muhammad Ijaz
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
Final year PhD student

Muhammad.ijaz@northumbria.ac.uk
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
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
System block diagram and experimental setup
Receiver End (Rx)







Free space optical communications
Channel modeling for FSO
Atmospheric effects on FSO
Hybrid RF/FSO communications
Digital Signal processing
Modulation Schemes
Fan
Power meters
Air Outlet
Fog Machine
Fans
Laser End
(Tx)
System block diagram
R&D communications
Air Outlet
The chamber with the controlled
amount of fog
(c)
Experimental setup