Research Projects

Understanding the value of noisy and unreliable feedback

Anant Sahai and Stark Draper¹

National Science Foundation CCF-729122

Feedback is helpful in communication systems to reduce the delays as well as simplify implementation. However, the information-theoretic study of feedback in such contexts has focussed almost entirely on perfect noiseless and free feedback. We are extending information theory to address noisy and unreliable feedback to see if the gains are robust.

[1]

Stark Draper and Anant Sahai, "Variable-length coding with noisy feedback," European Transactions on Telecommunications special issue on New Directions in Information Theory, June 2008.

[2]

Anant Sahai, "Why do block length and delay behave differently if feedback is present?" IEEE Transactions on Information Theory. Pages 1860-1886, May 2008.

¹University of Wisconsin, Madison

More information: http://www.eecs.berkeley.edu/%7Esahai/uni.html#Noisy