Search Results for author: Abla Kammoun

Found 10 papers, 1 papers with code

Precoding for High Throughput Satellite Communication Systems: A Survey

no code implementations17 Aug 2022 Malek Khammassi, Abla Kammoun, Mohamed-Slim Alouini

This survey presents an overview and a classification of the recent precoding techniques for HTS communication systems from two main perspectives: 1) a problem formulation perspective and 2) a system design perspective.

Vocal Bursts Intensity Prediction

Sharp Analysis of RLS-based Digital Precoder with Limited PAPR in Massive MIMO

no code implementations24 May 2022 Xiuxiu Ma, Abla Kammoun, Ayed M. Alrashdi, Tarig Ballal, Tareq Y. Al-Naffouri, Mohamed-Slim Alouini

We show that for this class of precoders, there is an optimal transmit per-antenna power that maximizes the system performance in terms of SINAD and bit error probability.

Weight Vector Tuning and Asymptotic Analysis of Binary Linear Classifiers

no code implementations1 Oct 2021 Lama B. Niyazi, Abla Kammoun, Hayssam Dahrouj, Mohamed-Slim Alouini, Tareq Al-Naffouri

Applying this method to a number of linear classifiers under a variety of data dimensionality and sample size settings reveals that the classification performance loss due to non-optimal native hyperparameters can be compensated for by weight vector tuning.

Dimensionality Reduction

A Precise Performance Analysis of Support Vector Regression

no code implementations21 May 2021 Houssem Sifaou, Abla Kammoun, Mohamed-Slim Alouini

In this paper, we study the hard and soft support vector regression techniques applied to a set of $n$ linear measurements of the form $y_i=\boldsymbol{\beta}_\star^{T}{\bf x}_i +n_i$ where $\boldsymbol{\beta}_\star$ is an unknown vector, $\left\{{\bf x}_i\right\}_{i=1}^n$ are the feature vectors and $\left\{{n}_i\right\}_{i=1}^n$ model the noise.

regression

High-Dimensional Quadratic Discriminant Analysis under Spiked Covariance Model

no code implementations25 Jun 2020 Houssem Sifaou, Abla Kammoun, Mohamed-Slim Alouini

Quadratic discriminant analysis (QDA) is a widely used classification technique that generalizes the linear discriminant analysis (LDA) classifier to the case of distinct covariance matrices among classes.

Classification General Classification +1

Improved Design of Quadratic Discriminant Analysis Classifier in Unbalanced Settings

no code implementations11 Jun 2020 Amine Bejaoui, Khalil Elkhalil, Abla Kammoun, Mohamed Slim Alouni, Tarek Al-Naffouri

The use of quadratic discriminant analysis (QDA) or its regularized version (R-QDA) for classification is often not recommended, due to its well-acknowledged high sensitivity to the estimation noise of the covariance matrix.

General Classification

Asymptotic Analysis of an Ensemble of Randomly Projected Linear Discriminants

no code implementations17 Apr 2020 Lama B. Niyazi, Abla Kammoun, Hayssam Dahrouj, Mohamed-Slim Alouini, Tareq Y. Al-Naffouri

Datasets from the fields of bioinformatics, chemometrics, and face recognition are typically characterized by small samples of high-dimensional data.

Face Recognition

A Model of Double Descent for High-dimensional Binary Linear Classification

no code implementations13 Nov 2019 Zeyu Deng, Abla Kammoun, Christos Thrampoulidis

We consider a model for logistic regression where only a subset of features of size $p$ is used for training a linear classifier over $n$ training samples.

Classification General Classification +2

Risk Convergence of Centered Kernel Ridge Regression with Large Dimensional Data

no code implementations19 Apr 2019 Khalil Elkhalil, Abla Kammoun, Xiangliang Zhang, Mohamed-Slim Alouini, Tareq Al-Naffouri

This paper carries out a large dimensional analysis of a variation of kernel ridge regression that we call \emph{centered kernel ridge regression} (CKRR), also known in the literature as kernel ridge regression with offset.

regression

A Large Dimensional Study of Regularized Discriminant Analysis Classifiers

1 code implementation1 Nov 2017 Khalil Elkhalil, Abla Kammoun, Romain Couillet, Tareq Y. Al-Naffouri, Mohamed-Slim Alouini

This article carries out a large dimensional analysis of standard regularized discriminant analysis classifiers designed on the assumption that data arise from a Gaussian mixture model with different means and covariances.

valid

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