This thesis proposes a positioning strategy for a fleet of unmanned aerial vehicles (UAVs) airlifting wireless base stations. First, two schedulers that model the distribution of resources within a single cell are analyzed. ...

With the arrival of 5G networks, higher frequencies need to be used at the mmWave bands in order to find available and broad enough spectral bands. At these high frequencies, with very short wavelengths, any obstacle between ...

Nowadays, implementing cost-efficient mobile backhaul networks is becoming one of the main problems for mobile operators, especially in rural and isolated areas where wired backhaul solutions such as cooper and optical ...

[ANGLÈS] In wireless communications, there is a trend to deploy shorter-distance networks to cope with the high demanding necessities of bit-rate that current applications require. In such networks, the power needed for ...

This dissertation deals with the proper design of efficient feedback strategies for Multiple-Input Multiple-Output (MIMO) communication systems. MIMO systems outperform single antenna systems in terms of achievable throughput ...

Wireless communications have evolved quickly in the recent years due to the exponential growth of the capacity required by the users, mainly for the introduction of the smartphones. The widespread use of these devices has ...

La tecnología Reconfigurable Intelligent Surface (RIS) se postula como una clara candidata a revolucionar las comunicaciones inalámbricas a partir del 6G y las siguientes generaciones de comunicaciones móviles. Una RIS es ...

Smartphones are no longer used only for voice communication; instead, they are used for web surfing, GPS navigation, acquiring and watching videos and photos, gaming, and many other purposes. As consequence, these ...

In the era of ubiquitous connectivity, next generation mobile networks capacity will continuously increase in order to support a progressively higher volume of data traffic, providing low latency and high reliability. The ...