Chandra's Publications

Journal Publications

• M. Zhang, A. D. S, Jayalath, T. D. Abhayapala, D. Smith, C. R. N. Athaudage, “Compensation Decoding of Space-Time-Frequency Block Codes”, IEEE Communications Letters, Vol. 11, Issue 7, July 2007, pp. 610-612. [PDF file]

• W. Shieh and C. Athaudage, “Coherent optical orthogonal frequency division multiplexing”, IEE Electronics Letters, Vol. 42, Issue 10, 11 May 2006, pp. 587-589. [PDF file]

• C. R. N. Athaudage and R. R. V. Angiras, “Sensitivity of zero-padded OFDM systems to time and frequency synchronization errors”, IEE Proceedings – Communications, Vol. 152, Issue 6, December 2005, pp. 945-951. [PDF file]

• V. Krishnamurthy, C. R.N. Athaudage, and D. Huang, “Adaptive OFDM synchronization algorithms based on discrete stochastic approximation”, IEEE Transactions on Signal Processing, Vol. 53, Issue 4, April 2005, pp. 1561 – 1574. [PDF file]

• C. R. N. Athaudage and A. D. S. Jayalath, “Enhanced MMSE channel estimation using timing error statistics for wireless OFDM systems”, IEEE Transactions on Broadcasting, Vol. 50, Issue 4, December 2004, pp. 369 – 376. [PDF file]

• C. R. N. Athaudage and A. D. S. Jayalath, “Delay-spread estimation using cyclic-prefix in OFDM systems”, IEE Proceedings – Communications, Vol. 151, Issue 6, December 2004, pp. 559 – 566. [PDF file]

• A. D. S. Jayalath and C. R. N. Athaudage, “On the PAR reduction of OFDM signals using multiple signal representation”, IEEE Communications Letters, Vol. 8, No. 7, July 2004, pp. 425 – 427. [PDF file]

• C. R. N. Athaudage, A. B. Bradley, and M. Lech, “Model-based speech signal coding using optimized temporal decomposition for storage and broadcasting”, EURASIP Journal on Applied Signal Processing – special issue on Digital Audio for Multimedia Communications, Hindawi Publishing Corporation, Vol. 2003, No. 10, September 2003, pp. 1016 – 1026. [PDF file]

• Athaudage C. R. Nandasena, P. C. Nguyen, and M. Akagi, “Spectral stability based event localizing temporal decomposition", Journal of Computer Speech and Language (CSL),Academic Press Limited, Vol. 15, No. 4, October 2001, pp. 381 – 401. [PDF file]

Conference Proceedings [Fully Refereed]

• R. R. V. Angiras, C. R. N. Athaudage, L. Andrew and J. H. Manton, “Phase noise compensation for OFDM WLAN systems using superimposed pilots”, The 10th IEEE InternationalConference on Communication Systems (ICCS’06), 30 October – 2 November, 2006, Singapore. [PDF file]

• J. L. Ong, A. D. S. Jayalath, and C. R. N. Athaudage, “Adaptive time-frequency spreading of quasi-orthogonal block codes for MIMO-OFDM systems”, The 10th IEEE International Conference on Communication Systems (ICCS’06), 30 October – 2 November, 2006, Singapore. [PDF file]

• C. R. N. Athaudage, J. Wang, and A. D. S. Jayalath, “An efficient framework to exploit frequency diversity in OFDM: Precoding with adaptive subcarrier selection”, The 17th IEEEInternational Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’06), 11-14 September, 2006, Helsinki, Finland. [PDF file]

• C. R. N. Athaudage and K. Sathananthan, “Lower bound on probability of error of Alamouti ST-coded OFDM systems with frequency offset in Rayleigh fading channels”, The 17thIEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’06), 11-14 September, 2006, Helsinki, Finland. [PDF file]

• R. R. V. Angiras, C. R. N. Athaudage, L. Andrew and J. H. Manton, “Optimal superimposed pilot selection for OFDM channel estimation”, The 7th IEEE International Workshop onSignal Processing Advances for Wireless Communications (SPAWC’06), 2-5 July, 2006, Cannes, France.

• C. R. N. Athaudage and P. Morris, “Fairness based resource allocation for multi-user MIMO-OFDM systems”, The 63rd IEEE Vehicular Technology Conference (VTC’06 Spring), 7-10 May, 2006, Melbourne, Australia.

• C. R. N. Athaudage and K. Sathananthan, “Cramer-Rao lower bound on frequency offset estimation error in OFDM systems with timing error feedback compensation”, The 5th International Conference on Information, Communications & Signal Processing (ICICS’05), 6 – 9 December, 2005, Bangkok, Thailand.

• K. Sathananthan and C. R. N. Athaudage, “Low-complexity diversity enhanced OFDM for wireless communications”, IEEE Region 10 International Technical Conference (TENCON’05), 21-24 November, 2005, Melbourne, Australia. [PDFfile]

• C. R. N. Athaudage and A. D. S. Jayalath, “Blind estimation of residual timing error in OFDM systems: A non-data-aided maximum-likelihood approach”, The 16th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’05), 11-14 September, 2005, Berlin, Germany.

• C. R. N. Athaudage and R. R. V. Angiras, “Sensitivity of FFT-equalized zero-padded OFDM systems to time and frequency synchronization errors”, The 16th IEEE InternationalSymposium on Personal, Indoor and Mobile Radio Communications (PIMRC’05), 11-14 September, 2005, Berlin, Germany.

• C. R. N. Athaudage and K. Sathananthan, “Probability of error of space-time coded OFDM systems with frequency offset in frequency-selective Rayleigh fading channels”, The IEEEInternational Conference on Communications (ICC’05), May 16-20, 2005, Seoul, Korea, pp. 2593-2599.

• R. R. V. Angiras, J. H. Manton, C. R. N. Athaudage and L. Andrew, “Iterative algorithms for channel identification using superimposed pilots”, 6th Australian Communication TheoryWorkshop (AusCTW2005), February 2-4, 2005, University of Queensland, Brisbane, Australia, pp. 180-185.

• K. Sathananthan and C. R. N. Athaudage, “Adaptive transform scheme to reduce PAR of an OFDM signal”, The 15th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’04), 5-8 September, 2004, Barcelona, Spain, pp. 1722-1725.

• C. R. N. Athaudage, K. Sathananthan, and R. R. V. Angiras, “Enhanced frequency synchronization for OFDM systems using timing error feedback compensation”, The 15th IEEEInternational Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’04), 5-8 September, 2004, Barcelona, Spain, pp. 1988-1992.

• A. D. S. Jayalath and C. R. N. Athaudage, “Peak power reduction of space-time coded OFDM signals", The IEEE International Symposium on Spread Spectrum Techniques and Applications (ISSSTA’04), 30 August - 2 September, 2004, Sydney, Australia, pp. 797-801.

• K. Sathananthan, C. R. N. Athaudage, and B. Qiu, “A novel ICI cancellation scheme to reduce both frequency offset and IQ imbalance effects in OFDM”, The Ninth IEEE Symposium on Computers and Communications (ISCC2004), June 29 – July 1, 2004, Alexandria, Egypt, Vol. 2, pp.708-713.

• C. R. N. Athaudage and V. Krishnamurthy, “Adaptive symbol tracking using discrete stochastic approximation for wireless OFDM systems”, The IEEE International Conference onCommunications (ICC’04), June 20-24, 2004, Paris, France, Vol. 4, pp. 2457-2463.

• K. Sathananthan and C. R. N. Athaudage, “Exact probability of error of ST-coded OFDM systems with frequency offset in flat Rayleigh fading channels”, 6th Australian Communication Theory Workshop (AusCTW2005), February 2-4, 2005, University of Queensland, Brisbane, Australia, pp. 20-25.

• R. R. V. Angiras and C. R. N. Athaudage, “Analysis of inter-carrier-interference in zero-padded OFDM systems”, 5th Australian Communication Theory Workshop (AusCTW2004), February 4-6, 2004, Newcastle, New South Wales, Australia, pp. 142-148.

• C. R. N. Athaudage and A. D. S. Jayalath, “Enhanced MMSE channel estimation using symbol timing error statistics for wireless OFDM systems”, The 7th International Symposium on Digital Signal Processing for Communication Systems (DSPCS’2003), December 8-11, 2003, Gold Coast, Australia, pp. 281-286.

• C. R. N. Athaudage and A. D. S. Jayalath, “A novel RMS delay-spread estimation technique for wireless OFDM systems”, Fourth International Conference on Information, Communications & Signal Processing (ICICS’03), December 15-18, 2003, Singapore, CD-ROM Only.

• C. R. N. Athaudage and M. Lech, “On optimal modeling of speech spectral transitions”, Fourth International Conference on Information, Communications & Signal Processing (ICICS’03), December 15-18, 2003, Singapore, CD-ROM Only.

• A. D. S. Jayalath and C. R. N. Athaudage, “On the PAR reduction of OFDM signals using multiple signal representation”, Proceedings of the 14th IEEE International Symposium onPersonal, Indoor and Mobile Radio Communications (PIMRC’03), September 7-10, 2003, Beijing, China, Vol. 1, pp. 799-803.

• C. R. N. Athaudage and A. D. S. Jayalath, “Low-complexity channel estimation for wireless OFDM systems”, Proceedings of the 14th IEEE International Symposium on Personal, Indoor and Mobile Radio Communications (PIMRC’03), September 7-10, 2003, Beijing, China, Vol. 1, pp. 521-525.

• C. R. N. Athaudage and A. D. S. Jayalath, “Delay-spread estimation using cyclic-prefix in wireless OFDM systems”, Proceedings of the IEEE International Conference on Audio, Speech and Signal Processing (ICASSP’03), April 6-10, 2003, Hong Kong, pp. 668-671.

• C. R. N. Athaudage and V. Krishnamurthy, “Novel low-complexity OFDM synchronization techniques based on discrete stochastic approximation”, Proceedings of the 4th Australian Communication Theory Workshop (AusCTW2003), February 5-7, 2003, Melbourne, Australia, pp. 99-103.

• C. R. N. Athaudage, “Infinite series computation of probability of error in BPSK/QPSK-OFDM systems with post-FFT phase error”, Proceedings of the 8th IEEE InternationalConference on Communication Systems (ICCS-2002), November 25-28, 2002, Singapore, pp. 47-51.

• C. R. N. Athaudage, “BER sensitivity of OFDM systems to time synchronization error”, Proceedings of the 8th IEEE International Conference on Communication Systems (ICCS-2002), November 25-28, 2002, Singapore, pp. 42-46.

• C. R. N. Athaudage and V. Krishnamurthy, “A low complexity timing and frequency synchronization algorithm for OFDM systems”, Proceedings of the IEEE Global Communications Conference 2002 (Globecom’02), November 17-21, 2002, Taipei, Taiwan, pp. 244-248.

• C. R. N. Athaudage, “On computational complexity of optimized temporal decomposition algorithm for speech signal modeling”, Proceedings of the 6th International Conference on Signal Processing (ICSP-2002), August 26-30, 2002, Beijing, China, pp. 437-440.

• C. R. N. Athaudage, Alan B. Bradley, and Margaret Lech, "On performance evaluation of a temporal decomposition based speech coder", Proceedings of the 3rd InternationalConference on Information, Communications, and Signal Processing (ICICS-2001), October 15-18, 2001, Singapore, CD-ROM Only.

• C. R. N. Athaudage, A. B. Bradley and M. Lech, "Efficient compression of MELP spectral parameters using optimized temporal decomposition”, Proceedings of the 8th AustralianInternational Conference on Speech Science and Technology (SST-2000), December 4-7, 2000, Canberra, ACT, Australia, pp. 386-391.

• C. R. N. Athaudage, A. B. Bradley and M. Lech, "Optimization of a temporal decomposition model of speech", Proceedings of the 5th International Symposium on Signal Processing and its Applications (ISSPA’99), August 22-25, 1999, Brisbane, Queensland, Australia, pp. 471-474.

• Athaudage. C. R. Nandasena and M. Akagi, "Spectral stability based event localizing temporal decomposition", Proceedings of the IEEE International Conference on Audio, Speechand Signal Processing (ICASSP '98), May 12-15, 1998, Seattle, Washington, USA, pp. 957-960.

Conference Proceedings (Other)

• W. Shieh and C. Athaudage, “System Performance of Coherent Optical Orthogonal Frequency Division Multiplexing”, Optical Society of America (OSA) Topical Meeting, Coherent Optical Technologies and Applications (Paper CWC5), Whistler, Canada, June 2006.

• Athaudage C. R. Nandasena and M. Akagi, "Temporal decomposition of speech excitation parameters", Proceedings of the 1998 Spring Meeting of Acoustical Society of Japan,March 17-19, 1998 Yokohama, Japan, pp. 277-278.

• Athaudage C. R. Nandasena and M. Akagi, "SBEL temporal decomposition for efficient spectral coding", Proceedings of the 1997 Fall Meeting of Acoustical Society of Japan,September 17-19, 1997 Hokkaido, Japan, pp. 345-346.

• Athaudage C. R. Nandasena and M. Akagi, “A New approach to temporal decomposition of speech”, Proceedings of the 1997 Spring Meeting of Acoustical Society of Japan, March 17-19, 1997 Kyoto, Japan, pp. 227-228.

Thesis

• Chandranath R. N. Athaudage, Speech Compression Using Optimised Temporal Decomposition for Voice Storage Applications, PhD Thesis submitted to the School of Electrical and Computer Systems Engineering, Royal Melbourne Institute of Technology, Australia, July 2001. [PDF file]

• Athaudage C. R. Nandasena, A New Approach to Temporal Decomposition of Speech and its Application to Low-Bit-Rate Speech Coding, Master's Thesis submitted to theDepartment of Information Processing, Japan Advanced Institute of Science and Technology, Japan, September 1997.

• Athaudage C. R. Nandasena, D. Mudugamuwa and S. Perera, Design and Construction of an Arbitrary Waveform Generator, Bachelor's Minor Thesis submitted to Department ofElectronic and Telecommunication Engineering, University of Moratuwa, Sri Lanka, August 1991.