Dr. V.R. Herath

Department of Electrical & Electronic Engineering
University of Peradeniya, Sri Lanka.
vijitha AT ee.pdn.ac.lk
vrherath AT gmail.com
+94-81-2393445

Research Publications


Conference / Journal / Technical report / Thesis


Optical Communication

Effect of Nonlinear Phase noise on the Performance of M-ary PSK in Optical Fiber Links”; N.Ekanayake, H.M.V.R. Herath; IEEE/OSA Journal of Lightwave Technology (under review)

"A study of Possible Modifications in 16 QAM Modulation Scheme to Compensate the Nonlinear Phase Noise in Long-haul Optical Communication System”; S.Tharranetharan, M.Saranraj, S.Sathyaram, and V.R.Herath; Transactions of the Institute of Engineers Sri Lanka, Oct. 2012.

"Optical transmission beyond 100 Gbps: techniques and challanges”; Vijitha R. Herath, S.Arulprasanth; Transactions of the Institute of Engineers Sri Lanka, 2011.

”Coherent Optical Communication : Towards Realtime Systems at 40 Gbit/s and Beyond”; T. Pfau, S. Hoffmann, O. Adamczyk, R. Peveling, V. Herath, M. Porrmann and R. Noé; Optics Express, Jan. 2008.

“A Review on the Recent Developments in WDM Based Optical Access Network”; P. Mookiah, and V. R. Herath; 2004 Annual Transactions of IESL.

Effect of Nonlinear Phase Noise on the Performance of M-ary DPSK Signals in Optical Fiber Links”; N. Ekanayake, H.M.V.R. Herath; ICCS 2012, Singapore, Nov. 2012 (accepted).

Performance Comparison of Optical Receivers Using Different Filtering Algorithms and Modulation Schemes”; Arunprasanth Sakthivel, Herath, V.R.,; ICIIS 2011, Kandy, Sri Lanka, Aug 2011.

“Simulation based analysis of 16-QAM constellations with five circular shells in long haul optical links”; S. Tharranetharan, M. Saranaraj, S.Sathyaram and V.R.Herath; Peradeniya University research sessions, December 2011.

Performance Comparison of Nonlinear Phase Noise Tolerant Constellation Diagrams”; S.Tharranetharan, M.Saranraj, S.Sathyaram and, V.R. Herath; ICIIS 2011, Kandy, Sri Lanka, Aug 2011.

“Noise suppression in optical coherent QPSK transmission systems using averaging filters”, S. Arulprasanth, H.M.N.D. Palapathwala, U.M. Amerasekara, V.R. Herath; Peradeniya University Research Sessions 2010, 16th December 2010, Peradeniya.

"Multiplier-Free Realtime Phase Tracking in Digital Synchronous QPSK Receiver for Coherent Optical Detection”; S. Hoffmann, V. Herath, M. El-Darawy, T. Pfau, C. Wördehoff, R. Peveling, U. Rückert, R. Noé; ICIIS 2009, Peradeniya, Sri Lanka, Dec 2009.

“Analysis of an ASIC-based Coherent Polarization-Multiplexed QPSK Receiver and Different Receiver Frontends”; Mohamed El-Darawy, Vijitha Herath, Timo Pfau, Sebastian Hoffmann, Ralf Peveling, Olaf Adamczyk, Christian Wördehoff, Ulrich Rückert, Reinhold Noé; ITG workshop (photonic networks) 2009, Leipzig, Germany.

”Towards Real-Time Implementation of Coherent Optical Communication”; T. Pfau, R. Peveling, V. Herath, S. Hoffmann, C. Wördehoff, M. Porrmann, O. Adamczyk; OFC 2009 ,San Diego, USA.

”Realtime Digital Polarization and Carrier Recovery in a Polarization-Multiplexed Optical QPSK Transmission”,R. Noé, S. Hoffmann, T. Pfau, O. Adamczyk, V. Herath, R. Peveling, M. Porrmann, in Proc. IEEE-LEOS Summer Topicals 2008, July 21-23, 2008, Acapulco, Mexico.

“Realtime Optical Synchronous QPSK Transmission with DFB lasers”; T. Pfau, O. Adamczyk,V. Herath, R. Peveling, S. Hoffmann, M. Porrmann and R. Noé; 2007 IEEE LEOS Summer Topicals.

“Real-time Digital Carrier & Data Recovery for a Synchronous Optical Quadrature Phase Shift Keying Transmission System”; R. Noé, T. Pfau, O. Adamczyk, R. Peveling, V. Herath, S. Hoffmann, M. Porrmann, S. Ibrahim, and S. Bhandare; 2007 IEEE MTT-S International Microwave Symposium Digest.

Intergrated Circuit Design

ASIC Design for a Coherent Optical Receiver DSPU”, Vijitha Rohana Herath, ISBN-13 9783844304190 (book)

High-Speed MOS ICs for a Signal Processor Input Interface of an Optical Synchronous QPSK Receiver and Related Clock Distribution Issues”; V. R. Herath; Dr. -Ing. Dissertation, March 2009

"A Simple Mean Clock Skew Estimation Algorithm for Clock Distribution Networks in Presence of Random Process Variations and Nonuniform Substrate Temperature”; Vijitha R. Herath, Reinhold Noé; ICIIS 2010, Mangalore, India, Aug 2010

“9.5 Gbit/s 20 Channel 1:8 DEMUX for a Coherent Optical Receiver DSPU ASIC Input Interface”; Vijitha R. Herath, Olaf Adamczyk, Ralf Peveling, Christian Wödehoff, Reinhold Noé; ICIIS 2009, Peradeniya, Sri Lanka, Dec 2009

”Chipset for a Coherent Polarization-Multiplex QPSK receiver”; V. Herath, R. Peveling, T. Pfau, S. Hoffmann, C. Wördehoff, M. Porrmann, O. Adamczyk, R. Noé; OFC 2009 ,San Diego, USA

“D17-Results of CMOS chip version B”, R. Peveling, V. Herath, R. Noé, Key components for synchronous optical quadrature phase shift keying transmission, EC SIXTH FRAMEWORK PROGRAMME, PRIORITY IST-2002-2.3.2.2 Optical, opto-electronic, & photonic functional components, 2008 (Technical report)

“D10b-Results of CMOS chip version A”, V. Herath, R. Noé, Key components for synchronous optical quadrature phase shift keying transmission, EC SIXTH FRAMEWORK PROGRAMME, PRIORITY IST-2002-2.3.2.2 Optical, opto-electronic, & photonic functional components, 2008 (Technical report)

“D6b-Report on tapeout of CMOS chip version A”, V. Herath, R. Peveling, O. Adamczyk, R. Noé, Key components for synchronous optical quadrature phase shift keying transmission, EC SIXTH FRAMEWORK PROGRAMME, PRIORITY IST-2002-2.3.2.2 Optical, opto-electronic, & photonic functional components, 2007 (technical report)

Control Systems

Stability of Distributed Sensor Networks”; V.R. Herath; 2002 MS Thesis, University of Miami

”Stabilizing Controller Design for Distributed Sensor Networks”; V.R. Herath, K. Premarathne, M. Dogruel,and P.H.Bauer; 2002 IEEE Sensors Conference, Orlando, USA

Other

"Review of Spectrum Sensing in Cognitive Radio”; L.N.T. Perera, and V.R. Herath; ICIIS 2011, Kandy, Sri Lanka, Aug 2011.

”Develop a Measuring System to Monitor Power Quality”; V.R. Herath, et. al.; 1998 IEE Younger Members Sessions, Sri Lanka.

Presentations

"Current trends in coherent optical transmission”, Seminar, SLT auditorium, November 2011.

"Coherent Optical Transmission Fundamentals and Implementation Issues”, WOCN 2010 Colombo Sri Lanka (Tutorial)

“Integrated circuit design issues at nanoscale”, Workshop on MEMS, ICIIS 2009, December 2009

“Coherent optical receiver design at nanoscale”; Workshop on Nanoscience and Nanotechnology: Some possibilities for research in Sri Lanka, Postgraduate Institute of Science, University of Peradeniya, December 2009