191 citations · 806 across the 53 of their papers we have counts for
29 papers · 1 filter
Minimax Optimal Estimation of KL Divergence for Continuous Distributions
Puning Zhao, Lifeng Lai
Estimating Kullback-Leibler divergence from identical and independently distributed samples is an important problem in various domains. One simple and effective estimator is based…
How did Donald Trump Surprisingly Win the 2016 United States Presidential Election? an Information-Theoretic Perspective (Clean Sensing for Big Data Analytics:Optimal Strategies,Estimation Error Bounds Tighter than the Cramér-Rao Bound)
Weiyu Xu, Lifeng Lai, Amin Khajehnejad
Donald Trump was lagging behind in nearly all opinion polls leading up to the 2016 US presidential election, but he surprisingly won the election. This raises the following importa…
Multi-Chart Detection Procedure for Bayesian Quickest Change-Point Detection with Unknown Post-Change Parameters
Jun Geng, Erhan Bayraktar, Lifeng Lai
In this paper, the problem of quickly detecting an abrupt change on a stochastic process under Bayesian framework is considered. Different from the classic Bayesian quickest change…
Compressed Hypothesis Testing: To Mix or Not to Mix?
Myung Cho, Weiyu Xu, Lifeng Lai
In this paper, we study the problem of determining anomalous random variables that have different probability distributions from the rest random variables. Instead of s…
Degraded Broadcast Channel with Secrecy Outside a Bounded Range
Shaofeng Zou, Yingbin Liang, Lifeng Lai +2
The -receiver degraded broadcast channel with secrecy outside a bounded range is studied, in which a transmitter sends messages to receivers, and the channel quality gra…
Precise Phase Transition of Total Variation Minimization
Bingwen Zhang, Weiyu Xu, Jian-Feng Cai +1
Characterizing the phase transitions of convex optimizations in recovering structured signals or data is of central importance in compressed sensing, machine learning and statistic…
Are Slepian-Wolf Rates Necessary for Distributed Parameter Estimation?
Mostafa El Gamal, Lifeng Lai
We consider a distributed parameter estimation problem, in which multiple terminals send messages related to their local observations using limited rates to a fusion center who wil…
An Information Theoretic Approach to Secret Sharing
Shaofeng Zou, Yingbin Liang, Lifeng Lai +1
A novel information theoretic approach is proposed to solve the secret sharing problem, in which a dealer distributes one or multiple secrets among a set of participants that for e…
The Capacity Region of the Source-Type Model for Secret Key and Private Key Generation
Huishuai Zhang, Lifeng Lai, Yingbin Liang +1
The problem of simultaneously generating a secret key (SK) and private key (PK) pair among three terminals via public discussion is investigated, in which each terminal observes a…
Quickest Search over Multiple Sequences with Mixed Observation
Jun Geng, Weiyu Xu, Lifeng Lai
The problem of sequentially finding an independent and identically distributed (i.i.d.) sequence that is drawn from a probability distribution by searching over multiple sequ…
Bayesian Quickest Change Point Detection with Sampling Right Constraints
Jun Geng, Erhan Bayraktar, Lifeng Lai
In this paper, Bayesian quickest change detection problems with sampling right constraints are considered. Specifically, there is a sequence of random variables whose probability d…
Quickest Change Point Detection and Identification Across a Generic Sensor Array
Di Li, Lifeng Lai, Shuguang Cui
In this paper, we consider the problem of quickest change point detection and identification over a linear array of sensors, where the change pattern could first reach any of t…
Non-Bayesian Quickest Detection with Stochastic Sample Right Constraints
Jun Geng, Lifeng Lai
In this paper, we study the design and analysis of optimal detection scheme for sensors that are deployed to monitor the change in the environment and are powered by the energy har…
Quickest Search Over Multiple Sequences with Mixed Observations
Jun Geng, Weiyu Xu, Lifeng Lai
The problem of sequentially finding an independent and identically distributed (i.i.d.) sequence that is drawn from a probability distribution by searching over multiple sequ…
Compressed Hypothesis Testing: to Mix or Not to Mix?
Weiyu Xu, Lifeng Lai
In this paper, we study the hypothesis testing problem of, among random variables, determining random variables which have different probability distributions from the rest…
Decoding the `Nature Encoded' Messages for Distributed Energy Generation Control in Microgrid
Shuping Gong, Husheng Li, Lifeng Lai +1
The communication for the control of distributed energy generation (DEG) in microgrid is discussed. Due to the requirement of realtime transmission, weak or no explicit channel cod…
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…
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…