coherent optical ofdm modem design with the aid...
TRANSCRIPT
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
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: [email protected]
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: [email protected]
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 [email protected] 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 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