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— In ad-hoc radio networks, mechanisms on how to access the radio channel are extremely important in order to improve network efficiency and, when needed, to guarantee QoS. Traditionally, Medium Access Control (MAC) protocols in ad hoc networks have been designed to face off the well known collision resolution problem. However, when using advanced signal(More)
— In this paper, the problem of resource allocation in multiuser single-antenna wideband OFDM(A) systems is considered from a cross-layer point of view. The main motivation is to show advantages of such systems with respect to narrowband systems. Despite the maximum normalized average throughput is not increased with respect to that in a narrowband system,(More)
— The paper has two parts: First, we present an overview of the IST WIreless DEployable Network System (WIDENS) Project. This project aims to define an easily deploy-able communication system to be used by emergency services and public safety in general. In this context, users require a communication system that should not depend on pre-existent(More)
Traditional works rely on the use of complete Channel State Information (CSI) at the base station to take space-time scheduling decisions in the uplink of multiuser MIMO wireless systems. However, this might be a complex and costly solution. On the other hand, the simplest scheduler is the Round Robin (RR) scheduler that schedules terminals one after the(More)