My research interests are in the areas of Digital Signal Processing and Wireless Communications and Networking. As such, my past and current work focuses on problems and topics that are at the intersection of these two areas. The main topics of my research are multimedia wireless communications, user cooperative communications, cognitive radio, multiple access to wireless networks, cross layer designs (especially joint source-channel coding and resource allocation), Digital Signal Processing algorithms and architectures, and speech and video processing for wireless communications.

Publications

Books


[1] K. J. R. Liu, A. K. Sadek, W. Su, A. Kwasinski, "Cooperative Communications and Networking", (650 pages), Cambridge University Press, 2009.

Journals


[1] A. El Sherif, A. Kwasinski, A. K. Sadek, K. J. Ray Liu, ``Content-Aware Cooperative Multiple Access Protocol for Packet Speech Communications'', IEEE Transactions on Wireless Communications, vol. 8, issue 2, pp. 995-1005, Feb. 2009.

[2] A. Kwasinski and K. J. R. Liu, ``Source-Channel-Cooperation Tradeoffs for Adaptive Coded Communications'', IEEE Transactions on Wireless Communications, vol. 7, issue 9, pp. 3347 -3358, Sept. 2008.

[3] A. Kwasinski and K. J. R. Liu, ``Towards a Unified Framework for Modeling and Analysis of Diversity in Joint Source-Channel Coding'', IEEE Transactions on Communications, vol. 56, issue 1, pp. 90-101, Jan. 2008.

[4] Z. Han, G-M. Su, A. Kwasinski, M. Wu, K. J. R. Liu, ``Multiuser Distortion Management of Layered Video over Resource Limited Multicode-CDMA'', IEEE Transactions on Wireless Communications, vol. 5, issue 11, pp. 3056-3067, Nov. 2006.

[5] Z. Han, A. Kwasinski and K. J. Ray Liu, ``Downlink Resource Allocation for Multimedia CDMA Networks Based on Real-Time Dynamic Joint Source Channel Coding'', IEEE Transactions on Communications, vol. 54, issue 9, pp. 1682-1692, Sept. 2006.

[6] A. Kwasinski, M. Alasti, K. J. R. Liu, N. Farvardin, ``A Low Complexity Source Encoding Assisted Multiple Access Protocol for Voice/Data Integrated Networks'', EURASIP Journal on Applied Signal Processing, vol. 2005, issue 2, pp. 193-206, 2005.

Conferences


[1] K. G. Seddik, A. Kwasinski and K. J. R. Liu, ``Asymptotic Distortion Performance of Source-Channel Diversity Schemes over Relay Channels'', in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC), pp. 1245-1250, March 2008.

[2] A. El Sherif, A. Kwasinski, A. K. Sadek and K. J. R. Liu, ``Content-Aware Cooperative Multiple Access Protocol for Packet Speech Communications'', in Proceeding of 2007 IEEE Global Telecommunications Conference (IEEE GLOBECOM 2007), pp. 2952-2956, Nov. 2007.

[3] A. Kwasinski and K. J. R. Liu, ``Characterization of Distortion-SNR Performance for Practical Joint Source-Channel Coding Systems'', in Proceeding of 2007 IEEE Global Telecommunications Conference (IEEE GLOBECOM 2007), pp. 3019-3023, Nov. 2007.

[4] K. G. Seddik, A. Kwasinski and K. J. R. Liu, ``Distortion Exponents for Different Source- Channel Diversity Achieving Schemes over Multi-Hop Channels'', in Proceedings of IEEE Intl. Conf. on Communications (ICC), vol. 3, pp. 969-974, Glasgow, Scotland, June 2007.

[5] J. Goldstein, A. Kwasinski, P. Kingsbury, R. Evans Sabin and A. McDowell, ``Annotating Subsets of the Enron Email Corpus'', Third Conference on Email and Anti-Spam, CEAS 2006, vol. 1, pp. 39-40.

[6] A. Kwasinski and K. J. R. Liu, ``Optimal Unequal Error Protection with User Cooperation for Transmission of Embedded Source-Coded Images”, IEEE International Conference on Image Processing (ICIP), pp. 717-720, Atlanta, GA, October, 2006.

[7] A. Kwasinski, H. V. Zhao, K. J. R. Liu, ``On QoS Constraints and Joint Source-Channel Coding for Real-Time Cooperative Multimedia Communications”, Proc. of 2006 IEEE Wireless Communications and Networking Conference, (WCNC), vol. 1, pp. 106-111, Las Vegas, NV, April, 2006.

[8] A. Kwasinski, Z. Han, K. J. R. Liu, ``Cooperative multimedia communications: Joint source coding and collaboration”, in 2005 Proceedings of IEEE Global Telecommunications Conference (GLOBECOM),, vol. 1, pp. 374-378, Saint Louis, MO, Nov.-Dec. 2005.

[9] A. Kwasinski, Z. Han, K. J. R. Liu, ``Joint Source Coding Diversity and Cooperative Diversity for Multimedia Communications”, in Proceedings of IEEE International Workshop on Signal Processing Advances for Wireless Communications (SPAWC), pp. 129-133, New York, NY, June 2005.

[10] A. Kwasinski, N. Farvardin, ``Optimal Resource Allocation for CDMA Networks Based on Arbitrary Real-Time Source Coders Adaptation with Application to MPEG4 FGS'', in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC), vol. 4, pp. 2010-2015, Atlanta, GA., March 2004.

[11] A. Kwasinski, Z. Han, K. J. R. Liu, ``Dynamic Real Time Distortion Management Over Multimedia Downlink CDMA'', in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC), vol. 4, pp. 2214-2219, Atlanta, GA., March 2004.

[12] G-M. Su, Z. Han, A. Kwasinski, M. Wu, K.J.R. Liu, ``Distortion Management of Real-time MPEG-4 FGS Video over Downlink Multicode CDMA Networks'', in Proceedings of IEEE Intl. Conf. on Communications (ICC), vol. 5, pp. 3071-3075, Paris, France, June 2004.

[13] A. Kwasinski, N. Farvardin, ``Extending Operation of a CDMA Network Beyond Congestion by Cross-Layer Resource Allocation for Real-Time Traffic in Fading Channels'', in Proceedings of Allerton Conference, pp. 1860 –1869, Monticello, IL, October 2004.

[14] A. Kwasinski, M. Alasti, N. Farvardin, K. J. R Liu ``Highly Efficient, Low Complexity Source-Assisted Multiple Access Protocol", in Proceedings of Allerton Conference, pp. 675- 684, Monticello, IL, October 2004.

[15] Z. Han, A. Kwasinski, K. J. Ray Liu and N. Farvardin, ``Pizza Party Algorithm for Real Time Distortion Management in Downlink Single-Cell CDMA Systems", in Proceedings of Allerton Conference, Monticello, IL, October 2004.

[16] A. Kwasinski, N. Farvardin, ``Resource Allocation for CDMA Networks Based on Real-Time Rate Adaptation'', in Proceedings of IEEE Intl. Conf. on Communications (ICC), vol. 5, pp. 3307-3311, Anchorage, AK, May 2003.

[17] A. Kwasinski, V. Chande, N. Farvardin, ``Delay-Constrained Joint Source-Channel Coding using Incremental Redundancy with Feedback'', in Proceedings of IEEE Information Theory Workshop, pp. 283-286, Paris, France, March-April 2003.

[18] A. Kwasinski, Z. Han, K. J. R. Liu, N. Farvardin, ``Power Minimization under Real-Time Source Distortion Constraints in Wireless Networks'', in Proceedings of IEEE Wireless Communications and Networking Conference (WCNC), vol. 1, pp. 532 -536 , New Orleans, LA, March 2003.

Other


[1] A. Kwasinski, ``Turbo Encoding/Decoding and Complexity/Performance Issues with Short Frames'', University of Maryland, Dept. of Electrical and Computer Engineering.

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