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Distributed Source Coding for Interactive Function Computation in Sensor Networks:

• N. Ma, P. Ishwar, and P. Gupta, "Information-Theoretic Bounds for Multiround Function Computation in Collocated Networks," IEEE International Symposium on Information Theory (ISIT), Coex, Seoul, Korea, 28 June - 3 July, 2009, submitted January 2009, under review. [arXiv:0901.2356].
• N. Ma and P. Ishwar, "Distributed Source Coding for Interactive Function Computation," IEEE Transactions on Information Theory, submitted November 2008, under review. [arXiv:0801.0756].
• P. Ishwar and S. S. Pradhan, "A Relay-assisted Distributed Source Coding Problem," Proceedings of the 3-rd IEEE International Workshop on Information Theory and its Applications (ITA), San Diego, CA, 27 January - 1 February, 2008, pages 136-141. [pdf]

Sequential Rate-Distortion Theory for Video Coding:

• N. Ma and P. Ishwar, "On Delayed Sequential Coding of Correlated Sources," IEEE Transactions on Information Theory, submitted September 2008, under review.    [arXiv:cs/0701197]
• P. Ishwar and K. Ramchandran, "On Decoder-Latency versus Performance tradeoffs in Differential Predictive Coding," Proceedings of the IEEE International Conference on Image Processing (ICIP), 24-27 October, 2004, volume 2, pages 1097-1100. [pdf]

Distributed Sampling and Interpolation for Field Reconstruction in Sensor Networks:

• Y. Wang and P. Ishwar, "Distributed Field Estimation using Randomly Deployed, Noisy, Binary Sensors," IEEE Transactions on Signal Processing, volume 57, issue 3, March 2009, pages 1177-1189.   [arxiv:0706.0685]
• Y. Wang, P. Ishwar, and V. Saligrama, "One-bit Distributed Sensing and Coding for Field Estimation in Sensor Networks," IEEE Transactions on Signal Processing, volume 56, issue 9, September 2008, pages 4433-4445. [pdf]
• A. Kumar, P. Ishwar, and K. Ramchandran, "High-resolution Distributed Sampling of Bandlimited Fields with Low-Precision Sensors," IEEE Transactions on Information Theory, submitted August 2007, under review. [arXiv:0707.1063]

Video Summarization:

• Z. Li, P. Ishwar, and J. Konrad, "Video Condensation by Ribbon Carving," IEEE Transactions on Image Processing, accepted for publication February 2009. [pdf] [Demo-website]

Diversity-Multiplexing Tradeoffs in Multi-antenna Wireless Communication Systems

• M. Sharif and P. Ishwar, "Benefit of Delay on the Diversity-Multiplexing Tradeoffs of MIMO Channels with Partial CSI," Proceedings of the IEEE International Symposium on Information Theory (ISIT), Nice, France, 24-29 June, 2007, pages 2831-2835. [pdf]
• I. Stojanovic, M. Sharif, and P. Ishwar, "On the Diversity-Multiplexing Region of Broadcast Channels with Partial Channel State Information," Proceedings of the 44-th Annual Allerton Conference on Communication, Control, and Computing, Monticello, IL, September 2006, pages 322-329. [pdf]

Information Security:

• Y. Wang and P. Ishwar, "Bootstrapped Oblivious Transfer and Secure Two-Party Function Computation," IEEE International Symposium on Information Theory (ISIT), Coex, Seoul, Korea, 28 June - 3 July, 2009, submitted January 2009, under review. [arXiv:0902.0822]
• M. Johnson, P. Ishwar, V. M. Prabhakaran, D. Schonberg, and K. Ramchandran, "On Compressing Encrypted Data," IEEE Transactions on Signal Processing: Special supplement on SECURE MEDIA, volume 52, issue 10, part 2, October 2004, pages 2992-3006. [pdf]
• S. Draper, P. Ishwar, D. Molnar, V. Prabhakaran, K. Ramchandran, D. Schonberg, and D. Wagner, "An evaluation of PMF-based Tests for Detection of Least Significant Bit Image Steganography," Proceedings of the 7th International Workshop on Information Hiding (IH), Barcelona, Spain, 6-8 June, 2005, pages 327-341. [pdf]

Distributed Video Coding:

• R. Puri, A. Majumdar, P. Ishwar, and K. Ramchandran, "Distributed Video Coding in Broadband Wireless Sensor Networks," IEEE Signal Processing Magazine, Special Issue on Distributed Signal Processing in Sensor Networks, volume 23, no. 4, pages 94-106, July, 2006. [pdf]
• A. Majumdar, R. Puri, P. Ishwar and K. Ramchandran, "Complexity/Performance Trade-offs for Robust Distributed Video Coding," Proceedings of the IEEE International Conference on Image Processing (ICIP), Special session on Distributed Video Coding, Genova, Italy, 11-14 September, 2005, volume 2, pages 678-681. [pdf]
• P. Ishwar, A. Majumdar, R. Puri, and K. Ramchandran, "Analysis of Motion-complexity and Robustness for Video Transmission," Proceedings of the IEEE CommSoc/TCCC International Conference on Wireless Networks, Communications, and Mobile Computing (Wirelesscom), Maui, HI, 13-16 June, 2005, volume 2, pages 1261-1265. [pdf]
• P. Ishwar, V. M. Prabhakaran, and K. Ramchandran, "Towards a Theory for Video Coding using Distributed Compression Principles," Proceedings of the IEEE International Conference on Image Processing (ICIP), Barcelona, Spain, 14-17 September, 2003, volume 2, pages 687-690. [pdf]

Distributed Source Coding for Estimation and Classification in Sensor Networks:

• P. Ishwar, R. Puri, K. Ramchandran, and S. S. Pradhan, "On Rate-constrained Distributed Estimation in Unreliable Sensor Networks," IEEE Journal on Selected Areas in Communications (JSAC): Special issue on SELF-ORGANIZING DISTRIBUTED COLLABORATIVE SENSOR NETWORKS, volume 23, issue 4, April 2005, pages 765-775. [pdf]
• P. Ishwar, V. M. Prabhakaran, and K. Ramchandran, "On Joint Classification and Compression in a Distributed Source Coding Framework," Proceedings of the IEEE Statistical Signal Processing (SSP) Workshop Special session on Compression for Sensor Networks, St. Louis, MO, 28 September-1 October, 2003, pages 34-37. [pdf]
• P. Ishwar, V. Prabhakaran, and K. Ramchandran, "On Source Encoding with Side-information under Ambiguous State of Nature," Proceedings of the IEEE International Symposium on Information Theory (ISIT), Seattle, WA, 9-14 July, pages 479-483. [pdf]

Channel Coding for Ultra-low-power Standby SRAM Operation:

• A. Kumar, H. Qin, P. Ishwar, J. Rabaey, and K. Ramchandran, "Fundamental Data Retention Limits in SRAM Standby Experimental Results," Proceedings of the 9-th IEEE International Symposium on Quality Electronic Design (ISQED), San Jose, CA, 17-19 March 2008, pages 92-97. [pdf]
• A. Kumar, H. Qin, P. Ishwar, J. Rabaey, and K. Ramchandran, "Fundamental Bounds on Power Reduction during Data-Retention in Standby SRAM," Proceedings of the IEEE International Symposium on Circuits and Systems (ISCAS), New Orleans, LA, 27-30 May, 2007, pages 1867-1870. [pdf]

Statistical Signal Modeling and Estimation using Set-Theoretic and Maximum Entropy Methods:

• P. Ishwar and P. Moulin, "On the Existence and Characterization of the Maxent Distribution under General Moment Inequality Constraints," IEEE Transactions on Information Theory, volume 51, issue 9, September 2005, pages 3322-3333. [pdf]
• P. Ishwar and P. Moulin, "On the Equivalence of Set-theoretic and Maxent MAP Estimation," IEEE Transactions on Signal Processing, volume 51, issue 3, March 2003, pages 698-713. [pdf]
• P. Ishwar and P. Moulin, "Image Modeling and Restoration - Information fusion, Set-theoretic methods, and the Maximum Entropy Principle," Bayesian Inference and Maximum Entropy Methods in Science and Engineering: Proceedings of the 20th International Workshop, Gif-sur-Yvette, France, 2000. Editor: Ali Mohammad-Djafari, pages 204-215, American Institute of Physics, 2001.

Image Restoration using Wavelet-based Overcomplete Representations:

• P. Ishwar, K. Ratakonda, P. Moulin, and N. Ahuja, "Image Denoising using Multiple Compaction Domains," Proceedings of the IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP), Special Session on the Role of Sparsity in Signal Processing, Seattle, WA, USA, 12-15 May 1998, pages 1889-1892. [pdf]
• P. Ishwar and P. Moulin, "Multiple-Domain Image Modeling and Restoration," Proceedings of the IEEE International Conference on Image Processing (ICIP), Kobe, Japan, 24-28 October 1999, volume 1, pages 362-366. [pdf]
• P. Ishwar and P. Moulin, "Shift Invariant Restoration - An Overcomplete Maxent MAP Framework," Proceedings of the IEEE International Conference on Image Processing (ICIP), Vancouver, Canada, 10-13 September 2000, volume 3, pages 270-272. [pdf]
• M. Singh, P. Ishwar, K. Ratakonda, and N. Ahuja, "Segmentation based Denoising using Multiple Compaction Domains," Proceedings of the IEEE International Conference on Image Processing (ICIP), Kobe, Japan, 24-28 October, 1999, volume 1, pages 372-375. [pdf]

Adaptive Motion Compensation Algorithms for Video Coding:

• P. Ishwar and P. Moulin, "On Spatial Adaptation of Motion Field Smoothness in Video Coding," IEEE Transactions on Circuits and Systems for Video Technology, volume 10, issue 6, September 2000, pages 980-989. [pdf]