191 citations · 806 across the 53 of their papers we have counts for
6 papers · 1 filter
Interference Alignment for Secrecy
Onur Ozan Koyluoglu, Hesham El Gamal, Lifeng Lai +1
This paper studies the frequency/time selective -user Gaussian interference channel with secrecy constraints. Two distinct models, namely the interference channel with confident…
On the Secure Degrees of Freedom in the K-User Gaussian Interference Channel
Onur Ozan Koyluoglu, Hesham El Gamal, Lifeng Lai +1
This paper studies the K-user Gaussian interference channel with secrecy constraints. Two distinct network models, namely the interference channel with confidential messages and th…
Rateless Coding for MIMO Block Fading Channels
Yijia Fan, Lifeng Lai, Elza Erkip +1
In this paper the performance limits and design principles of rateless codes over fading channels are studied. The diversity-multiplexing tradeoff (DMT) is used to analyze the syst…
Optimal Medium Access Protocols for Cognitive Radio Networks
Lifeng Lai, Hesham El Gamal, Hai Jiang +1
This paper focuses on the design of medium access control protocols for cognitive radio networks. The scenario in which a single cognitive user wishes to opportunistically exploit…
Authentication over Noisy Channels
Lifeng Lai, Hesham El Gamal, H. Vincent Poor
In this work, message authentication over noisy channels is studied. The model developed in this paper is the authentication theory counterpart of Wyner's wiretap channel model. Tw…
Optimal Medium Access Control in Cognitive Radios: A Sequential Design Approach
Lifeng Lai, Hesham El Gamal, Hai Jiang +1
The design of medium access control protocols for a cognitive user wishing to opportunistically exploit frequency bands within parts of the radio spectrum having multiple bands is…