Concept

Couche physique

Publications associées (436)

Power Control is Not Required for Wireless Networks in the Linear Regime

We consider the design of optimal strategies for joint power adaptation, rate adaptation and scheduling in a multi-hop wireless network. Most existing strategies control either power and scheduling, or rates and scheduling, but not the three together as we ...

2004

When Power Adaptation is Useless or Harmful

Jean-Yves Le Boudec

We consider the design of optimal strategies for joint power adaptation, rate adaptation and scheduling in a multi-hop wireless network. Most existing strategies for ad-hoc networks control either power and scheduling, or rates and scheduling, but not the ...

2004

On the Throughput of Ad-Hoc Networks using Connectivity Graphs

Christina Fragouli

In this paper we propose a set of necessary and sufficient conditions under which the throughput in an ad-hoc network can remain constant as the number of nodes n increases. Throughput refers to the minimum achievable rate between a source-destination pair ...

2004

SWARM-BOT: a New Distributed Robotic Concept

Dario Floreano, Francesco Mondada, André Guignard, Mirco Dorigo, Luca Maria Gambardella

The swarm intelligence paradigm has proven to have very interesting properties such as robustness, flexibility and ability to solve complex problems exploiting parallelism and self-organization. Several robotics implementations of this paradigm confirm tha ...

2004

Modeling techniques and verification methodologies for substrate coupling effects in mixed-signal system-on-chip designs

Michel Declercq, Adil Koukab

The substrate noise coupling problems in today's complex mixed-signal system-on-chip (MS-SOC) brings a new set of challenges for designers. In this paper, we propose a global methodology that includes an early verification in the design flow as well as a p ...

2004

Authentication of documents and articles by moire patterns

Roger Hersch, Sylvain Chosson

The present invention relies on the moiré patterns generated when superposing a base layer made of base band patterns and a revealing line grating (revealing layer). The produced moiré patterns comprise an enlargement and a transformation of the individual ...

2004

Reduction of the boron cross-contamination for plasma deposition of p–i–n devices in a single-chamber large area radio-frequency reactor

Christoph Hollenstein, Arvind Shah, Alan Howling, Cédric Bucher, Juliette Ballutaud, Stefano Benagli

In this article, a new treatment to reduce boron contamination of the interface between the p- and i- layer is presented. An ammonia flush, performed at 10 Pa for 1 min, after deposition of the p-layer considerably reduces the boron contamination at the p- ...

2004

Towards Analog and Mixed-Signal SOC Design with SystemC-AMS

Alain Vachoux

Systems-on-Chip (SoCs) are heterogeneous by nature as they may integrate digital, analog, RF hardware as well as software components or non electrical parts such as sensors or actuators. The increasing level of complexity for designing SoCs in a reasonable ...

2004

High modulus pavement design using accelerated loading testing (ALT)

André-Gilles Dumont, Mehdi Ould Henia

In anticipation of the introduction of high modulus materials in the Swiss standards, a research project has been carried out for the evaluation of these bituminous mixtures. Three full-size test sections were built in a test hall for ALT named Halle-fosse ...

2004

Assessment of Resistance to Rutting of High Modulus Bituminous Mixtures Using Full-Scale Accelerated Loading Tests.

André-Gilles Dumont

In anticipation of the introduction of high modulus materials in the Swiss standards, a research project has been carried out for the evaluation of these bituminous mixtures. These mixtures make possible to reduce rut in base courses. With a temperature of ...

2004

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