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@northumbria.ac.uk

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

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 Algorism)

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

Setups and photos, descriptions

Lei Liu (PhD)

Address: 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.

R&D communications

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

3rd Year Ph.D Student

Room E409 Ellison Building

Northumbria Communications Research lab

School of Computing, Engineering & Information Sciences,

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

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:

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

pal hhhh

OOKModulation

Optical Laser

Finite Gaussian

LensPhoto

detector

OOK Demodulation

Input Output

Atmospheric

Channel

L

0w Lw D

Channel

EncoderSub-Channel 1 1;ap 11 xy

Sub-Channel 2 2;ap 22 xy

1x

2x

1y

2y

s

1m

2m

s

FSO Link

RF Link

OOK

Modulation

1c

Direct Digital

Modulation

2c

1c

2c

Channel

Decoder

Information

Source

1m

2m

OOK

Demodulation

Direct Digital

Demodulation

Information

Sink

Channel

Encoder

Channel

Decoder

It Ee Lee

PhD Student (Year 2)

Contact Details:

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.

R&D communications

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.

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

Thavamaran Kanesan

Final year PhD student

E411, Ellison Building,

Northumbria University, NE1 8ST,

Newcastle upon Tyne, United Kingdom.

Thavamaran.Kanesan @ northumbria.ac.uk

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

System block diagram and experimental setup

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

Muhammad Ijaz

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

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

System block diagram and experimental setup

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