This report addresses the problem of deriving fundamental trade-off bounds for wireless ad hoc networks when multiple performance criteria are of interest. It proposes a MultiObjective (MO) performance evaluation framework composed of a broadcast and interference-limited network model, a steady state performance metric derivation inspired by a discrete Markov chain formalism and formulates the ...

We conducted semi-natural experiments to measure the relative contribution of various environmental factors and intraspecific and interspecific competition with an exotic invader on the daytime and crepuscular activity levels of Atlantic salmon (Salmo salar) fry. We demonstrated that interspecific competition with the exotic rainbow trout (Oncorhynchus mykiss) significantly increases the daytim...

Inter-symbol interférence is the main obstacle in reliable digital communications. Except for the spécial partial response signaling system, ISI must be suppressed as much as possible in order to obtain reliable digital communications. In wideband digital com­ munication, equalization is one of the main techniques to reverse ISI channel. Décision feedback equalizer is a popular structure becaus...

Résumé Nous présentons des solutions algorithmiques pour deux problèmes liés à l’interférence de réseau sans fil. D’abord on propose de ordonnancer les liens d’un ensemble de routes données en vertu de l’hypothèse d’un modèle à fort trafic. Nous considérons un protocole TDMA qu’offre une source d’intervalles de temps synchronisés et cherchent à ordonnancer les itinéraires des liens afin de maxi...

Résumé The quality of communication in a wireless network is primarily determined by the wireless link signal quality expressed in term of signal-to-interference-plus-noise ratio. The fact that better signal quality enhances the communication quality incites to look for states where each receiver connects to a transmitter providing it with the best signal quality. Using stochastic geometry and ...

In this paper we define and study a call scheduling problem that is motivated by radio networks. In such networks the physical space is a common resource that nodes have to share, since concurrent transmissions cannot be interfering. We study how one can satisfy steady bandwidth demands according to this constraint. This leads to the definition of a call scheduling problem. We show that it can ...