Carrier and Power Assignment for Flexible Broadband GEO Satellite Communications System

in PIMRC 2020 Proceedings (2020)

Current multi-beam GEO satellite systems operate under a limited frequency reuse configuration and considering uniform power assignment across beams. The latter has been shown to be inefficient in ... [more ▼]

Current multi-beam GEO satellite systems operate under a limited frequency reuse configuration and considering uniform power assignment across beams. The latter has been shown to be inefficient in matching the geographic distribution of the traffic demand. In this context, next generation of broadband GEO satellite systems will be equipped with more flexible and reconfigurable payloads, facilitating on-demand resource allocation. In this paper, we consider both carrier and power assignment to match the requested beam demands while minimizing the total transmit power and the total utilized bandwidth. A novel optimization problem is formulated and, given its non-convex structure, we divide the problem into two tractable sub-problems. First, we estimate the number of adjacent frequency carriers required for each beam to satisfy its demand and, subsequently, we optimize the power allocation based on the previously assigned carriers. We validate the proposed method with extensive numerical results, which demonstrate its efficiency with respect to benchmark strategies. [less ▲]

Small Scale CLTs for the Nodal Length of Monochromatic Waves

E-print/Working paper (2020)

Le dépaysement ou quand tremble l'écriture de Jean Portante

in Thiltges, Sébastian; Solte-Gresser, Christiane (Eds.) Écologie culturelle et cultures écologiques dans la Grande Région (2020)

Portante’s work develops a genuine poetics of space. On the one hand: the geo- graphical space, shaped by the back and forth between the Terres Rouges of Differdange, the host land, and the homeland of ... [more ▼]

Portante’s work develops a genuine poetics of space. On the one hand: the geo- graphical space, shaped by the back and forth between the Terres Rouges of Differdange, the host land, and the homeland of L’Aquila, the trembling land since the earthquake of 2009. On the other hand: the textual space thus generated, shaped by the symbolism of the in-between (French/Italian, fiction/non-fictionnal). The topoi of the earth and the (family) home, correlated to the matrices of the work, the mother tongue and family history, are constantly revisited by the author, and can therefore be re-read under the double prism of ecopoetics and material ecocriticism. The North/South tension (Luxembourg/Italy) can then be considered afresh for its poetic and narrative transformation. This article will thus try to formulate a hypothesis for an ecopoetic reading of Portante’s work centred on the pivot point that constitutes – for both writing and work – the L’Aquila earthquake, which engages the work in a new cycle. This trembling of the writing will then be addressed through the notion of “dépaysement”, in the polysemic richness that offers this term, or even motif: from a literal to a political and poetic meaning. [less ▲]

Zwischen neuem „Hör-Gefühl“ und „Psychoterror“: Die Debatte über die emotionale Wirkung der Kunstkopf-Stereophonie im Hörspiel der 1970er Jahre

in Heßler, Martina (Ed.) Technikemotionen (2020)

Kernel Selection in Nonparametric Regression

E-print/Working paper (2020)

In the regression model Y=b(X)+ε, where X has a density f, this paper deals with an oracle inequality for an estimator of bf, involving a kernel in the sense of Lerasle et al. (2016), selected via the PCO ... [more ▼]

In the regression model Y=b(X)+ε, where X has a density f, this paper deals with an oracle inequality for an estimator of bf, involving a kernel in the sense of Lerasle et al. (2016), selected via the PCO method. In addition to the bandwidth selection for kernel-based estimators already studied in Lacour, Massart and Rivoirard (2017) and Comte and Marie (2020), the dimension selection for anisotropic projection estimators of f and bf is covered. [less ▲]

Changing Trends in Gender Equality in Ethiopia

Report (2020)

Actually getting some satisfaction. Need-supply fit of fundamental motives at work

in Frontiers in Psychology (2020), 11

The Multidimensional Forced-Choice Format as an alternative for rating scales. Current state of research

in European Journal of Psychological Assessment (2020), 36

Single-cell transcriptomics reveals multiple neuronal cell types in human midbrain-specific organoids

in Cell and Tissue Research (2020)

Media Pluralism Monitor 2020: Country report Luxembourg

Report (2020)