Khisti, Ashish, Wornell, Gregory
The MIMOME channel is a Gaussian wiretap channel in which the sender, receiver, and eavesdropper all have multiple antennas. We characterize the secrecy capacity as the saddle-value of a minimax...
Secure Transmission with Multiple Antennas: The MISOME Wiretap Channel (2007)
Khisti, Ashish, Wornell, Gregory
The role of multiple antennas for secure communication is investigated within the framework of Wyner's wiretap channel. We characterize the secrecy capacity in terms of generalized eigenvalues when...
Khisti, Ashish, Tchamkerten, Aslan, Wornell, Gregory
Wyner's wiretap channel is extended to parallel broadcast channels and fading channels with multiple receivers. In the first part of the paper, we consider the setup of parallel broadcast channels...
Coding Techniques for Multicasting (2006)
Thesis Supervisor: Gregory Wornell Title: Professor Thesis Supervisor: Uri Erez Title: Post Doctoral Scholar
Coding Techniques for Multicasting (2006)
Thesis Supervisor: Gregory Wornell Title: Professor Thesis Supervisor: Uri Erez Title: Post Doctoral Scholar
Fundamental Limits and Scaling Behavior of Cooperative Multicasting in Wireless Networks (2005)
Khisti, Ashish, Erez, Uri, Wornell, Gregory
A framework is developed for analyzing capacity gains from user cooperation in slow fading wireless networks when the number of nodes (network size) is large. The framework is illustrated for the...
Carbon Copying Onto Dirty Paper (2005)
Khisti, Ashish, Erez, Uri, Lapidoth, Amos, Wornell, Gregory
A generalization of the problem of writing on dirty paper is considered in which one transmitter sends a common message to multiple receivers. Each receiver experiences on its link an additive...
A Simple Cooperative Diversity Method Based on Network Path Selection (2005)
Bletsas, Aggelos, Khisti, Ashish, Reed, David P., Lippman, Andrew
Cooperative diversity has been recently proposed as a way to form virtual antenna arrays that provide dramatic gains in slow fading wireless environments. However most of the proposed solutions...