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- Samir Medina Perlaza, Nadia Fawaz, Samson Lasaulce, Mérouane Debbah
- IEEE Transactions on Signal Processing
- 2010

We describe a noncooperative interference alignment (IA) technique which allows an opportunistic multiple input multiple output (MIMO) link (secondary) to harmlessly coexist with another MIMO link (primary) in the same frequency band. Assuming perfect channel knowledge at the primary receiver and transmitter, capacity is achieved by transmiting along the… (More)

- Samir Medina Perlaza, Hamidou Tembine, Samson Lasaulce, Mérouane Debbah
- IEEE Journal of Selected Topics in Signal…
- 2012

This paper introduces a particular game formulation and its corresponding notion of equilibrium, namely the satisfaction form (SF) and the satisfaction equilibrium (SE). A game in SF models the case where players are uniquely interested in the satisfaction of some individual performance constraints, instead of individual performance optimization. Under this… (More)

- Julien Dumont, Walid Hachem, Samson Lasaulce, Philippe Loubaton, Jamal Najim
- IEEE Transactions on Information Theory
- 2010

In this paper, the capacity-achieving input covariance matrices for coherent block-fading correlated multiple input multiple output (MIMO) Rician channels are determined. In contrast with the Rayleigh and uncorrelated Rician cases, no closed-form expressions for the eigenvectors of the optimum input covariance matrix are available. Classically, both the… (More)

- Samson Lasaulce, Mérouane Debbah, Eitan Altman
- IEEE Signal Processing Magazine
- 2009

Non exhaustive methodologies for characterizing equilibria in wireless games in terms of existence, uniqueness, selection, and efficiency are provided. The paper will focus on technical problems arising at the physical and medium access layers of a wireless network, and not on economic aspects related to it, like the auction problem for spectrum, even… (More)

- Luca Rose, Samir Medina Perlaza, Samson Lasaulce, Mérouane Debbah
- IEEE Communications Magazine
- 2011

In this article, a survey of several important equilibrium concepts for decentralized networks is presented. The term decentralized is used here to refer to scenarios where decisions (e.g., choosing a power allocation policy) are taken autonomously by devices interacting with each other (e.g., through mutual interference). The iterative long-term… (More)

- Maël Le Treust, Samson Lasaulce
- IEEE Trans. Wireless Communications
- 2010

Decentralized multiple access channels where each transmitter wants to selfishly maximize his transmission energy-efficiency are considered. Transmitters are assumed to choose freely their power control policy and interact (through multiuser interference) several times. It is shown that the corresponding conflict of interest can have a predictable outcome,… (More)

We present two interference alignment techniques such that an opportunistic point-to-point multiple input multiple output (MIMO) link can reuse, without generating any additional interference, the same frequency band of a similar pre-existing primary link. In this scenario, we exploit the fact that under power constraints, although each radio maximizes… (More)

- Elena Veronica Belmega, Samson Lasaulce
- IEEE Transactions on Signal Processing
- 2011

The problem of energy-efficient precoding is investigated when the terminals in the system are equipped with multiple antennas. Considering static and fast-fading multiple-input multiple-output (MIMO) channels, the energy-efficiency is defined as the transmission rate to power ratio and shown to be maximized at low transmit power. The most interesting case… (More)

- Julien Dumont, Philippe Loubaton, Samson Lasaulce
- GLOBECOM
- 2006

We determine the capacity-achieving input covariance matrices for coherent block-fading correlated MIMO Rician channels. In contrast with the Rayleigh and uncorrelated Rician cases, no closed-form expressions for the eigenvectors of the optimum input covariance matrix are available. Both the eigenvectors and eigenvalues have to be evaluated by using… (More)

- Elena Veronica Belmega, Samson Lasaulce, Mérouane Debbah, Marc Jungers, Julien Dumont
- Telecommunication Systems
- 2011

We consider wireless networks that can be modeled by multiple access channels in which all the terminals are equipped with multiple antennas. The propagation model used to account for the effects of transmit and receive antenna correlations is the unitary-invariant-unitary model, which is one of the most general models available in the literature. In this… (More)