31 citations · 42 across the 4 of their papers we have counts for
4 papers
Lower Bounds on the Rate-Distortion Function of LDGM Codes
A. G. Dimakis, M. J. Wainwright, K. Ramchandran
A recent line of work has focused on the use of low-density generator matrix (LDGM) codes for lossy source coding. In this paper, wedevelop a generic technique for deriving lower b…
Bits through ARQs
Krishnan Eswaran, Michael Gastpar, Kannan Ramchandran
A fundamental problem in dynamic frequency reuse is that the cognitive radio is ignorant of the amount of interference it inflicts on the primary license holder. A model for such a…
Information-theoretic limits on sparse signal recovery: Dense versus sparse measurement matrices
Wei Wang, Martin J. Wainwright, Kannan Ramchandran
We study the information-theoretic limits of exactly recovering the support of a sparse signal using noisy projections defined by various classes of measurement matrices. Our analy…
Network Coding for Distributed Storage Systems
Alexandros G. Dimakis, P. Brighten Godfrey, Yunnan Wu +2
Distributed storage systems provide reliable access to data through redundancy spread over individually unreliable nodes. Application scenarios include data centers, peer-to-peer s…