Publications by Olivier Lévêque

Assessing Computational Thinking: Development and Validation of the Algorithmic Thinking Test for Adults

Olivier Lévêque, Cécile Hardebolle, Marc Lafuente Martinez

This study describes the development and validation process of a computational thinking (CT) test for adults. The team designed a set of items and explored a subset of those through two qualitative pilots. Then, in order to provide validity evidence based ...

2022

On Generalized Weighted Hilbert Matrices

Olivier Lévêque

We study spectral properties of generalized weighted Hilbert matrices. In particular, we establish results on the spectral norm, the determinant, and various relations between the eigenvalues and eigenvectors of such matrices. We also study the asymptotic ...

Pacific Journal Mathematics2013

Spatial Degrees of Freedom of Large Distributed MIMO Systems and Wireless Ad Hoc Networks

Olivier Lévêque

We consider a large distributed MIMO system where wireless users with single transmit and receive antenna cooperate in clusters to form distributed transmit and receive antenna arrays. We characterize how the capacity of the distributed MIMO transmission s ...

Institute of Electrical and Electronics Engineers2013

Hierarchical Beamforming for Large One-Dimensional Wireless Networks

Olivier Lévêque, Alla Merzakreeva

We consider a wireless network with a large number of source-destination pairs distributed over a line. Under line-of-sight propagation, this network has only one degree of freedom for communication. At high SNR, this one degree of freedom can be readily a ...

Ieee2012

Information Theoretic Operating Regimes of Large Wireless Networks

Olivier Lévêque, Ayfer Özgür Aydin

In analyzing the point-to-point wireless channel, insights about two qualitatively different operating regimes --bandwidth- and power-limited-- have proven indispensable in the design of good communication schemes. In this paper, we propose a new scaling l ...

2010

Throughput-Delay Tradeoff for Hierarchical Cooperation in Ad Hoc Wireless Networks

Olivier Lévêque, Ayfer Özgür Aydin

Hierarchical cooperation has recently been shown to achieve better throughput scaling than classical multihop schemes under certain assumptions on the channel model in static wireless networks. However, the end-to-end delay of this scheme turns out to be s ...

Institute of Electrical and Electronics Engineers2010

Linear Capacity Scaling in Wireless Networks: Beyond Physical Limits?

Olivier Lévêque, Ayfer Özgür Aydin

We investigate the role of cooperation in wireless networks subject to a spatial degrees of freedom limitation. To address the worst case scenario, we consider a free-space line-of-sight type environment with no scattering and no fading. We identify three ...

2010

Diversity-Multiplexing Tradeoff for the MIMO Static Half-Duplex Relay

Olivier Lévêque

In this paper, we investigate the diversity-multiplexing tradeoff (DMT) of the multiple-antenna (MIMO) static half-duplex relay channel. A general expression is derived for the DMT upper bound, which can be achieved by a compress-and-forward protocol at th ...

Institute of Electrical and Electronics Engineers2010

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Olivier Lévêque

Assessing Computational Thinking: Development and Validation of the Algorithmic Thinking Test for Adults

On Generalized Weighted Hilbert Matrices

Spatial Degrees of Freedom of Large Distributed MIMO Systems and Wireless Ad Hoc Networks

Proof of a conjecture by Gazeau et al. using the Gould-Hopper polynomials

Hierarchical Beamforming for Large One-Dimensional Wireless Networks

A Probabilistic Approach of Sum Rules for Heat Polynomials

Information Theoretic Operating Regimes of Large Wireless Networks

Throughput-Delay Tradeoff for Hierarchical Cooperation in Ad Hoc Wireless Networks

Linear Capacity Scaling in Wireless Networks: Beyond Physical Limits?

Diversity-Multiplexing Tradeoff for the MIMO Static Half-Duplex Relay

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Proof of a conjecture by Gazeau et al. using the Gould-Hopper polynomials

A Probabilistic Approach of Sum Rules for Heat Polynomials

Diversity-Multiplexing Tradeoff for the MIMO Static Half-Duplex Relay

On Generalized Weighted Hilbert Matrices

Information Theoretic Operating Regimes of Large Wireless Networks

Linear Capacity Scaling in Wireless Networks: Beyond Physical Limits?

Hierarchical Beamforming for Large One-Dimensional Wireless Networks

Assessing Computational Thinking: Development and Validation of the Algorithmic Thinking Test for Adults

Spatial Degrees of Freedom of Large Distributed MIMO Systems and Wireless Ad Hoc Networks