201 citations · 1.2k across the 107 of their papers we have counts for
7 papers · 2 filters
On the Capacity of a Class of MIMO Cognitive Radios
Sriram Sridharan, Sriram Vishwanath
Cognitive radios have been studied recently as a means to utilize spectrum in a more efficient manner. This paper focuses on the fundamental limits of operation of a MIMO cognitive…
Relay Subset Selection in Wireless Networks Using Partial Decode-and-Forward Transmission
Caleb K. Lo, Sriram Vishwanath, Robert W. Heath
This paper considers the problem of selecting a subset of nodes in a two-hop wireless network to act as relays in aiding the communication between the source-destination pair. Opti…
Scheduling and Pre-Conditioning in Multi-User MIMO TDD Systems
Jubin Jose, Alexei Ashikhmin, Phil Whiting +1
The downlink transmission in multi-user multiple-input multiple-output (MIMO) systems has been extensively studied from both communication-theoretic and information-theoretic persp…
The Impact of Channel Feedback on Opportunistic Relay Selection for Hybrid-ARQ in Wireless Networks
Caleb K. Lo, Robert W. Heath, Sriram Vishwanath
This paper presents a decentralized relay selection protocol for a dense wireless network and describes channel feedback strategies that improve its performance. The proposed selec…
Rate Bounds for MIMO Relay Channels
Caleb K. Lo, Sriram Vishwanath, Robert W. Heath
This paper considers the multi-input multi-output (MIMO) relay channel where multiple antennas are employed by each terminal. Compared to single-input single-output (SISO) relay ch…
Generation of Efficient Codes for Realizing Boolean Functions in Nanotechnologies
Ashish Kumar Singh, Adnan Aziz, Sriram Vishwanath +1
We address the challenge of implementing reliable computation of Boolean functions in future nanocircuit fabrics. Such fabrics are projected to have very high defect rates. We over…
Opportunistic Relay Selection with Limited Feedback
Caleb K. Lo, Robert W. Heath, Sriram Vishwanath
It has been shown that a decentralized relay selection protocol based on opportunistic feedback from the relays yields good throughput performance in dense wireless networks. This…