Some of the future wireless networks are related tothe provision of higher data rates and lower energy consumption.In contrast to the clear increasing spectrum demand, bandwidthis a limited resource. Cooperative ...

In digital communication systems the use of filters that fulfill the first Nyquist criterion (Nyquist-I), guarantees that a sequence of pulses will not be affected by inter-symbol interference (ISI) if the receiver ...

Direct-to-satellite Internet of Things (IoT) solutions have attracted a lot of attention from industry and academia recently, as promising alternatives for large scale coverage of a massive number of IoT devices. In this ...

Cognitive radio (CR) has emerged as a key technology to deal with the frequency spectrum scarcity. The efficient and opportunistic use of the spectrum requires rapid coordination between the secondary users (SUs). Besides, ...

En escenarios vehiculares, y en particular en las intersecciones urbanas, la línea de vista entre los vehículos a menudo se ve afectada por obstáculos como edificios, vehículos estacionados o en movimiento o inclusive de ...

Vehicularad hocnetworks (VANETs) have emergedas a paradigm for sharing information among vehicles andinfrastructure that has the potential to provide road safety andtravellers comfort. The bandwidth limitation is one of ...

Jamming attacks in wireless sensor networks (WSNs) scenarios are detrimental to the performance of these networks and affect the security and stability of the service perceived by users. Therefore, the evaluation of the ...

This work presents the proposal and evaluation of network size estimation mechanisms for media access protocols in a satellite IoT scenario. The study scenario is a wireless network of sensors deployed on the Earth's surface ...