201 citations · 1.2k across the 107 of their papers we have counts for
9 papers · 2 filters
On the Fundamental Limits of Interweaved Cognitive Radios
G. Chung, S. Vishwanath, C. S. Hwang
This paper considers the problem of channel sensing in cognitive radios. The system model considered is a set of N parallel (dis-similar) channels, where each channel at any given…
On Degrees of Freedom Region of MIMO Networks without CSIT
Chiachi Huang, Syed A. Jafar, Shlomo Shamai +1
In this paper, we study the effect of the absence of channel knowledge for multiple-input-multiple-output (MIMO) networks. Specifically, we assume perfect channel state information…
On Algebraic Traceback in Dynamic Networks
Abhik Das, Shweta Agarwal, Sriram Vishwanath
This paper introduces the concept of incremental traceback for determining changes in the trace of a network as it evolves with time. A distributed algorithm, based on the methodol…
Hybrid Coding for Gaussian Broadcast Channels with Gaussian Sources
Rajiv Soundararajan, Sriram Vishwanath
This paper considers a degraded Gaussian broadcast channel over which Gaussian sources are to be communicated. When the sources are independent, this paper shows that hybrid coding…
On Models of Multi-user Gaussian Channels with Fading
Rony EL Haddad, Brian Smith, Sriram Vishwanath
An analytically tractable model for Gaussian multiuser channels with fading is studied, and the capacity region of this model is found to be a good approximation of the capacity re…
On the Secrecy Rate of Interference Networks using structured codes
Shweta Agrawal, Sriram Vishwanath
This paper shows that structured transmission schemes are a good choice for secret communication over interference networks with an eavesdropper. Structured transmission is shown t…
Ergodic Interference Alignment
Bobak Nazer, Michael Gastpar, Syed A. Jafar +1
This paper develops a new communication strategy, ergodic interference alignment, for the K-user interference channel with time-varying fading. At any particular time, each receive…
Pilot Contamination and Precoding in Multi-Cell TDD Systems
Jubin Jose, Alexei Ashikhmin, Thomas L. Marzetta +1
This paper considers a multi-cell multiple antenna system with precoding used at the base stations for downlink transmission. For precoding at the base stations, channel state info…
On the Stability Region of Amplify-and-Forward Cooperative Relay Networks
Jubin Jose, Lei Ying, Sriram Vishwanath
This paper considers an amplify-and-forward relay network with fading states. Amplify-and-forward scheme (along with its variations) is the core mechanism for enabling cooperative…