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University of Notre Dame
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Shivaprasad Kotagiri
Education
M.S.E.E., University of Missouri--Rolla, 2003.
B.S., Osmania University, Hyderabad
Research Summary
Information theory is a powerful tool in setting up theoretical bounds on rate at which information can be transmitted across point to point and multi user channels, and rate at which any source can be compressed. This motivated me to work in the field of Information theory. As a part of my PhD, I have been working on multi user channels with side information or state information known at encoders. This state or side information could be interference from other users, fading coefficients, or watermarking signal in watermarking applications. I would like to answer following questions as a part of my PhD.
- In the case of multi user channels with state information, if all users have access to state information prior to transmission of information, Can these users benefit in terms of achievable rates?
- If some of the users are strong enough to capture the information about state of the channel prior to transmission of information, Can these informed users help uninformed users in terms of achievable rates and decoder in estimating the state of the channel simultaneously or separately?
We know that there is a duality between channel coding and source coding in most of the cases. This motivates me to work on source coding problems dual to multi-user channels with side or state information known at the encoder.
Publications
| [1] | S. Kotagiri and J. N. Laneman, “Achievable Rates for Multiple Access Channels with State Information Known at One Encoder,” in Proc. Allerton Conf. Communications, Control, and Computing, Monticello, IL, Oct. 2004. [ PDF ] |
| [2] | S. Kotagiri and J. N. Laneman, “Reversible Information Embedding in Multi-user Channels,” in Proc. Allerton Conf. Communications, Control, and Computing, Monticello, IL, Sept. 2005. [ PDF ] |
| [3] | W. Zhang, S. Kotagiri, and J. N. Laneman, “Information Transmission over the Postal Channel with and without Feedback,” in Proc. IEEE Int. Symp. Information Theory (ISIT), Seattle, WA, July 2006, pp. 2749-2753. [ PDF ] |
| [4] | S. Kotagiri and J. N. Laneman, “Information Embedding in Degraded Broadcast Channels,” in Proc. IEEE Int. Symp. Information Theory (ISIT), Seattle, WA, July 2006, pp. 494-498. [ PDF ] |
| [5] | W. Zhang, S. Kotagiri, and J. N. Laneman, “Writing on Dirty Paper with Resizing and its Application to Quasi-Static Fading Broadcast Channels,” in Proc. IEEE Int. Symp. Information Theory (ISIT), Nice, France, June 2007. [ PDF ] |
| [6] | S. Kotagiri and J. N. Laneman, “Multiaccess Channels with State Information Known to One Encoder: A Case of Degraded Message Sets,” in Proc. IEEE Int. Symp. Information Theory (ISIT), Nice, France, June 2007. [ PDF ] |
| [7] | S. Kotagiri and J. N. Laneman, “Variations on Information Embedding in Multiple Access and Broacast Channels,” IEEE Trans. Inform. Theory, Nov. 2007, accepted for publication. [ PDF ] |
| [8] | W. Chang, S. Kotagiri, J. N. Laneman, S.-Y. Chung, and Y.-H. Lee, “Compress-Forward Relaying over Parallel Gaussian Channels,” in Proc. Comp. Adv. Mult-Sensor and Adaptive Processing, St. Thomas, US Virgin Islands, Dec. 2007. [ PDF ] |
| [9] | S. Kotagiri, “State-Dependent Networks with Side Information and Partial State Recovery,” Ph.D. dissertation, University of Notre Dame, Notre Dame, IN, Dec. 2007. [ PDF ] |
| [10] | S. Kotagiri and J. N. Laneman, “Multiple Access Channels with State Information Known to Some Encoders and Independent Messages,” EURASIP J. Wireless Comm. Net., vol. 2008, Feb. 2008. [ PDF ] |
| [11] | A. Zaidi, S. Kotagiri, J. N. Laneman, and L. Vandendorpe, “Cooperative Relaying with State Available at the Relay Only,” in Proc. IEEE Information Theory Workshop (ITW), Porto, Portugal, May 2008. [ PDF ] |
| [12] | A. Zaidi, S. Kotagiri, J. N. Laneman, and L. Vandendorpe, “Cooperative Relaying with State Available Non-Causally at the Relay,” IEEE Trans. Inform. Theory, Dec. 2008, accepted for publication. [ PDF ] |
| [13] | A. Zaidi, S. Kotagiri, , J. N. Laneman, and L. Vandendorpe, “Multiaccess Channels with State Known to One Encoder: Another Case of Degraded Message Sets,” in Proc. IEEE Int. Symp. Information Theory (ISIT), Seoul, Korea, July 2009. [ PDF ] |
| [14] | W. Zhang, S. Kotagiri, and J. N. Laneman, “On Downlink Transmission Without Transmit Channel State Information and With Outage Constraints,” IEEE Trans. Inform. Theory, vol. 55, no. 9, pp. 4240-4248, Sept. 2009. [ PDF ] |