A MAC protocol for Ultra Wide Band (UWB) radio networks named (UWB) 2 is proposed. The algorithm exploits typical features of impulse radio such as large processing gain, and is conceived in conjunction with a synchronization strategy which foresees the presence of a synchronization sequence in each transmitted packet. (UWB) 2 adopts a pure Aloha approach;… (More)
Modeling MultiUser Interference (MUI) is crucial in the design of wireless networks. In the case of Impulse Radio (IR)-Ultra Wide Band (UWB) networks, most of the adopted models are inspired by the legacy of the reference literature on spread spectrum communications, and do not address specific features for IR systems, where spectrum spreading is basically… (More)
We formalize a model for a self-organizing network of nodes that operate according to the UWB principle based on hybrid modelling formalism. We design the rules that lead to the formation of the network and in particular an admission control procedure that is capable to handle both continuous and discrete perturbations, while maintaining the network in a… (More)
— When considering applications requiring QoS it is crucial to adopt in the MAC adaptive resource allocation strategies in order to reduce system load. This paper proposes an analytical procedure for optimizing resource allocation in the case of mobile Ultra Wide Band (UWB) users in an indoor environment. The proposed analysis incorporates both the user… (More)
networks is finally proposed and evaluated by means of simulations.
pulses by a quantity that is quantized over the inter-pulse interval range. In this paper, we relax the hypothesis of a discrete value for the time shift introduced by the TH code, by considering the possibility of generating real-valued codes that introduce time hopping in a fluid way. The effect on the power spectral density of generated signals is… (More)
– Modeling Multi User Interference (MUI) in Impulse Radio (IR) – Ultra Wide Band (UWB) networks is addressed in this paper. The reference scenario consists of multiple asynchronous users transmitting IR-UWB signals using Pulse Position Modulation (PPM) in combination with Time Hopping (TH) coding. We provide a novel analytical expression for the average BER… (More)
— Introducing cognitive principles in the design of a wireless network appears as an attractive option when considering the emerging scenario of coexisting networks. In this paper we introduce cognitive features in a network of IEEE 802.15.4a devices, and show that significant improvements in terms of network lifetime can be achieved by allowing the devices… (More)