Research Interests:
My areas of interest are communications,
control, and signal processing. Within that range, my focus is on the
communications theory side, particularly in the areas of wireless and
information theory. Within information theory, my main interest is in
developing the conceptual tools needed to understand feedback,
interaction, delay, reliability, and complexity. To that end, I am interested in
control and dynamical systems as they provide well understood
mathematical models that do not mesh with the classical notions from
information theory. They also tell us why delay is important. On the
wireless communication side, I am interested in power consumption and how multi-scale
heterogenous wireless systems can coexist peacefully. Cognitive radio
is of particular interest.
My research sits within the Wireless
Foundations center, where we study the fundamental basis for the
wireless technologies of the future. Click here for a list of
representative talks and their associated slides. Meanwhile, the following pages
give more details about some of my research interests, with links to additional
publications, etc.
A few recent research results: (Descriptions and much more can be found here and here.)
- G. Atia, A. Sahai, and V. Saligrama, "Spectrum Enforcement and Liability Assignment in Cognitive Radio Systems", Submitted to the 2008 IEEE Symposium on Dynamic Spectrum Access Networks (DySpAN).
- Kristen Ann Woyach and Anant Sahai, "A toy-model for the regulation of cognitive radios", Submitted to the 2008 IEEE Symposium on Dynamic Spectrum Access Networks (DySpAN).
- Mubaraq Mishra and Anant Sahai, "Multiband Sensing for Area Recovery", Submitted to the 2008 IEEE Symposium on Dynamic Spectrum Access Networks (DySpAN).
- Rahul Tandra and Anant Sahai, "Noise calibration, delay coherence and SNR walls for signal detection", Submitted to the 2008 IEEE Symposium on Dynamic Spectrum Access Networks (DySpAN).
- A. Gohari, A. Parsa, and A. Sahai "Exploiting Interference Diversity for Event-Based Spectrum Sensing", Submitted to the 2008 IEEE Symposium on Dynamic Spectrum Access Networks (DySpAN).
- P. Grover and A. Sahai, "Witsenhausen's counterexample as Assisted Interference Suppression", Submitted to a Special Issue on "Information Processing and Decision Making in Distributed Control Systems" in the International Journal of Systems, Control and Communications, 2008.
P. Grover and A. Sahai, "A vector version of Witsenhausen's counterexample: Towards the convergence of control, communication and computation," Submitted to the 2008 Conference on Decision and Control, 2008.
- R. Tandra, S. M. Mishra, and A. Sahai, "What is a spectrum hole and what does it take to recognize one?", Accepted to the Proceedings of the IEEE for a special issue on Cognitive Radio, 2008 (under minor revision)
- P. Grover and A. Sahai, "Little Green Codes: Energy-Efficient Short-Range Communication", Accepted to the 2008 International Symposium on Information Theory in Toronto
- C. Chang and A. Sahai, "Trade-off of lossless source-coding error exponents", Accepted to the 2008 International Symposium on Information Theory in Toronto
- A. Sahai and S. Draper, "The `hallucination' bound for the BSC", Accepted to the 2008 International Symposium on Information Theory in Toronto
- S. Draper and Anant Sahai, "Variable-length coding with noisy feedback," European Transactions on Telecommunications special issue on New Directions in Information Theory, June 2008.
- A. Sahai, "Why block length and delay behave differently if feedback is present," IEEE Transactions on Information Theory. Pages 1860-1886, May 2008.
Earlier Preprint: arXiv: cs.IT/0610138
- R. Tandra and Anant Sahai, "SNR Walls for signal detection," IEEE Journal on Special Topics in Signal Processing, pages 4-17, Feb 2008.
R. Tandra and Anant Sahai, "SNR walls for feature detectors," IEEE DySpAN 2007
- Anant Sahai and Pulkit Grover, "The price of certainty: `waterslide curves' and the gap to capacity". Submitted to the IEEE Transactions on Information Theory, 2007.
- H. Palaiyanur, C. Chang and A. Sahai, "The source coding game with a cheating switcher," Submitted to the IEEE Transactions on Information Theory, 2007.
"Lossy compression of active sources" Accepted to ISIT 2008
H. Palaiyanur and A. Sahai, "On the uniform continuity of the rate-distortion function" Accepted to ISIT 2008
Preliminary version presented at IEEE ISIT 2007
- K. Eswaran, A.D. Sarwate, Anant Sahai, and M. Gastpar, "Limited feedback achieves the empirical capacity," submitted to the IEEE Transactions on Information Theory, 2007.
Preprint: arXiv: arXiv:0711.0237
K. Eswaran, A.D. Sarwate, A. Sahai, and M. Gastpar, "Binary additive channels with individual noise sequences and limited active feedback," IEEE ISIT 2007
- Anant Sahai, "Balancing forward and feedback error correction for erasure channels with unreliable feedback," submitted to the IEEE Transactions on Information Theory, 2007.
Preprint: arXiv: 0712.0871
- C. Chang and A. Sahai, "Universal Quadratic Lower Bounds on Source Coding Error Exponents," CISS 2007
C. Chang and Anant Sahai, "Universal Fixed-Length Coding Redundancy," ITW 2007
- C. Chang and Anant Sahai, "The price of ignorance: the impact on side-information for delay in lossless source coding," submitted to the IEEE Transactions on Information Theory, 2007.
Preprint: arXiv:0712.0873
- P. Grover and Anant Sahai, "Writing on Rayleigh faded dirt: a computable upper bound to the outage capacity," IEEE ISIT 2007
P. Grover and Anant Sahai, "On the Need for Knowledge of the Phase in Exploiting Known Primary Transmissions," IEEE DySpAN 2007
- A. Sahai and S. Mitter, "Source
coding and channel requirements for unstable processes,"
submitted to IT Transactions. Revised.
Preprint:
arXiv: cs.IT/0610151
- A. Sahai and S. Mitter, "The
necessity and sufficiency of anytime capacity for control over a
noisy communication link: Part I" IT Transactions, Pages 3369 - 3395, Aug 2006 and
"Part II", submitted to
IT Transactions Revised.
preprints:
arXiv: cs.IT/0601007 and
arXiv: cs.IT/0610146
