Raafat, Ahmed (Date of defense: 2020-07-22)
The rapid growth of wireless industry opens the door to several use cases such as internet of things and device-to-device communications, which require boosting the reliability and the spectral efficiency ...
Henarejos Hernández, Pol (Date of defense: 2017-07-19)
Radiocommunication systems have evolved significantly in recent years in order to meet present and future demands. Historically, time, frequency and more recently, spatial dimensions have been used to ...
Lagén Morancho, Sandra (Date of defense: 2016-12-21)
The envisioned rapid and exponential increase of wireless data traffic demand in the next years imposes rethinking current cellular networks due to the available spectrum scarcity. In this regard, 3 ...
Tabares Giraldo, Jeison (Date of defense: 2021-09-08)
Worldwide, the coherent technologies have revolutionized the optical communication systems, significantly increasing the capacity of the fiber channel owing to transmission of advanced modulation formats ...
Ardanuy Della, Antoni (Date of defense: 2020-12-14)
This thesis aims at exploring the limits of low peak-power, low-cost, all-semiconductor, compact lidars (laser radars) for range-resolved remote sensing of atmospheric aerosols and clouds. The systems ...
Figuerola Fernández, Sergi (Date of defense: 2016-01-25)
This work was developed during a period where most of the optical management and provisioning system where manual and proprietary. This work contributed to the evolution of the state of the art of optical ...
Rojas Hernández, Miguel Ángel (Date of defense: 2019-11-20)
Nowadays, the growing demand for frequency-free bands for new emerging wireless technologies and fixed frequency allocation policies in the use of the radio spectrum have resulted in a saturation of the ...
Blanco Botana, Luis (Date of defense: 2017-07-22)
This dissertation deals with different subset selection problems in wireless communications systems. These type of problems have a combinatorial nature, which makes them computationally intractable for ...
Yahyavi, Mehran (Date of defense: 2016-03-18)
Power amplifiers (PAs) are one of the most crucial elements in wireless standards becasue they are the most power hungry subsystems. These elements have to face an important issue, which is the power ...
Torrellas Socastro, Marc (Date of defense: 2016-02-10)
The emergence of very capable mobile terminals, e.g. smartphones or tablets, has dramatically increased the demand of wireless data traffic in recent years. Current growth forecasts elucidate that ...