Capacity characterization of wireless relay networks

Speaker: Samar Agnihotri

Abstract

The information-theoretic capacity of general relay networks has been an open problem for more than the last fifty years. Numerous achievability schemes have been proposed. However, none of these schemes consistently provides tight characterization of the capacity or outperforms all other schemes in all scenarios. Further, the computational complexity of most of such schemes render their end-to-end performance characterization intractable. Toward our pursuit of constructing low-complexity schemes to tightly characterize the capacity of general relay networks, we analyze the performance of one of the simplest relaying schemes: amplify-and-forward in Gaussian relay networks. In this talk, we discuss some of the major results and insights that we obtained from this work and which we hope to be useful for addressing the general problem.

Bio

Samar Agnihotri is a faculty member in the School of Computing and Electrical Engineering at IIT Mandi. He holds M.Sc (Engg.) and Ph.D. degrees in Electrical Sciences from IISc. His research interests are in the areas of information theory and communications.