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Harnessing Wireless Channels for Scalable and Privacy-preserving Federated Learning

Wireless connectivity is instrumental in enabling scalable federated learning (FL), yet wireless channels bring challenges for model training, in which channel randomness perturbs each worker's model update while multiple workers' updates incur …

Q-GADMM: Quantized Group ADMM for Communication Efficient Decentralized Machine Learning

In this article, we propose a communication-efficient decentralized machine learning (ML) algorithm, coined quantized group ADMM (Q-GADMM). To reduce the number of communication links, every worker in Q-GADMM communicates only with two neighbors, …

User Clustering for MIMO NOMA via Classifier Chains and Gradient-Boosting Decision Tree

In this paper, we propose a data-driven approach to group users in a Non-Orthogonal Multiple Access (NOMA) MIMO setting. Specifically, we formulate user clustering as a multi-label classification problem and solve it by coupling a Classifier Chain …

Efficient Importance Sampling for the Left Tail of Positive Gaussian Quadratic Forms

Estimating the left tail of quadratic forms in Gaussian random vectors is of major practical importance in many applications. In this paper, we propose an efficient and robust importance sampling estimator that is endowed with the bounded relative …

A CNN Based Structured Light Communication Scheme for Internet of Underwater Things Applications

Underwater optical wireless communication is an emerging field that can provide reliable connectivity for future generation internet of underwater things devices. In this paper, we propose a communication system based on single and superposition of …

Level Crossing Rate and Average Outage Duration of Free Space Optical Links

The level crossing rate (LCR) and the average outage duration (AOD) are two important second order statistics that allow a deeper understanding of the behavior of the channel. In this paper, we study these metrics in order to assess the performance …

On the Fast and Precise Evaluation of the Outage Probability of Diversity Receivers Over α−μ , κ−μ , and η−μ Fading Channels

In this paper, we are interested in determining the cumulative distribution function of the sum of α-μ, κ-μ, and η-μ random variables in the setting of rare event simulations. To this end, we present a simple and efficient importance sampling …

Efficient Simulation of the Outage Probability of Multihop Systems

In this paper, we present an efficient importance sampling estimator for the evaluation of the outage probability of multihop systems with amplify-and-forward channel state-information-assisted. The proposed estimator is endowed with the bounded …

A Generic Simulation Approach for the Fast and Accurate Estimation of the Outage Probability of Single Hop and Multihop FSO Links Subject to Generalized Pointing Errors

When assessing the performance of the free space optical (FSO) communication systems, the outage probability encountered is generally very small, and thereby the use of nave Monte Carlo simulations becomes prohibitively expensive. To estimate these …

On the Efficient Simulation of the Distribution of the Sum of Gamma–Gamma Variates With Application to the Outage Probability Evaluation Over Fading Channels

The Gamma-Gamma distribution has recently emerged in a number of applications ranging from modeling scattering and reverberation in sonar and radar systems to modeling atmospheric turbulence in wireless optical channels. In this respect, assessing …