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 improve capacity and robustness. Paradoxically, radiocommunications that leverage the polarization dimension have not evolved at the same pace. In particular, these communications are widely used by satellites, where several streams are multiplexed in each orthogonal polarization.
Current communication trends advocate for simplifying and unifying different frameworks in order to increase flexibility and address future needs. Due to this, systems that do not require channel information are progressively gaining traction, as they help to improve the overall quality of the network instead of that of specific users only.
The search for new paradigms aimed at improving the quality of wireless communications is unstoppable. In order to increase the capacity of current communications systems, new horizons and physical dimensions must be explored.
This dissertation aims at challenging this perspective and promoting the use of polarization in new radiocommunication systems. Consequently, the goal of this thesis is twofold: first, we aim at increasing the current capacity of point-to-point and point-to-multipoint links. Secondly, we introduce new mechanisms to increase the robustness of communications in particularly hostile environments. In this context, this thesis advocates for the use of polarization as a dimension to be exploited in radiocommunications.
In addition to the use of polarization, index modulations help increase transmission rates whilst improving robustness against errors and imperfections with a low computational complexity. Thus, the study of polarization in these systems is essential. This dissertation explores primordial aspects in this area, such as channel capacity, transmitter and receiver design and performance benchmarking with current systems. Finally, we identify and discuss various characteristic aspects of polarization.
In this thesis, the reader will navigate the mathematical foundations of the proposed concepts as well as their implementation in real-life scenarios. After all, engineering excels at the intersection of the underlying physical principles with their real-life implementation.
Pol Henarejos received the Telecommunication Engineering degree from the Telecommunication Engineering High School from Barcelona (ETSETB) of Technical University of Catalonia (UPC) in May 2009. In 2012, he obtained the Master of Science in Research on Information and Communication Technologies from UPC. In 2017, he obtained the Ph.D. degree from UPC, with a distinction Cum Laude.
He joined the CTTC in January 2010 in Engineering area and he worked prototyping the physical layer communication technologies using software development. He also obtained a knowledge in LTE technologies thanks to industrial contracts for implementing the physical layer of LTE, BGAN and Li-Fi standards. He participated in European projects such as PHYDYAS and FANTASTIC-5G and with industrial contracts. Additionally, he participated in projects funded by the European Space Agency. He is also the promoter of the CASTLE Platform.
Currently he is researching on new technologies based on multimedia satellite communications with dual polarization, implementation of physical stack of many standards and enabling 5G technologies on flexible multicast and broadcast communications.
ORCID #: 0000-0002-6879-5693