191 citations · 806 across the 53 of their papers we have counts for
3 papers · 1 filter
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 Wiretap Channel with Feedback: Encryption over the Channel
Lifeng Lai, Hesham El Gamal, H. Vincent Poor
In this work, the critical role of noisy feedback in enhancing the secrecy capacity of the wiretap channel is established. Unlike previous works, where a noiseless public discussio…