24 citations · 43 across the 5 of their papers we have counts for
6 papers · 1 filter
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…
Cognitive Medium Access: Exploration, Exploitation and Competition
Lifeng Lai, Hesham El Gamal, Hai Jiang +1
This paper establishes the equivalence between cognitive medium access and the competitive multi-armed bandit problem. First, the scenario in which a single cognitive user wishes t…
Secrecy Capacity of the Wiretap Channel with Noisy Feedback
Lifeng Lai, Hesham El Gamal, H. Vincent Poor
In this work, the role of noisy feedback in enhancing the secrecy capacity of the wiretap channel is investigated. A model is considered in which the feed-forward and feedback sign…
The Relay-Eavesdropper Channel: Cooperation for Secrecy
Lifeng Lai, Hesham El Gamal
This paper establishes the utility of user cooperation in facilitating secure wireless communications. In particular, the four-terminal relay-eavesdropper channel is introduced and…