|LINSALATA FRANCESCO||Cycle: XXXV |
Tutor: CESANA MATTEO
Advisor: MAGARINI MAURIZIO Major Research topic
:Physical Layer Performance Analysis and Novel Modulation Formats Investigation for Vehicular NetworksAbstract:
The main focus of this PhD research is to investigate potentials and performance limits of the physical layer blocks such as link paramters, modulation, coding, and waveforms design in scenarios with aerial and terrestrial vehicles, and moving users. From the perspective of waveforms design, many new solutions have been developed, but they cannot meet in a flexible way all the system requirements of this new Beyond fifth Generation (B5G) system. The current 5G-NR waveform, based on Orthogonal Frequency Division Multiplexing (OFDM), is characterized by low spectral efficiency and high Peak-To-Average Power Ratio (PAPR). Similar to OFDM, Discrete Fourier Transform (DFT) spreaded OFDM (DFT-s-OFDM) also poses challenges in the high mobility (Doppler impairments) scenarios such as, for example, Enhanced Vehicle-to-Everything (eV2X) communications and the Flying Ad-hoc Networks (FANETs). Hence, there is high interest in the development of new multi-carrier waveforms that are able to overcome the limits of OFDM. With this aim, new tuneable waveforms that are able to support variable and customizable pulse shaping filters, such that the air interface can be optimized to each individual application scenario, is one of the research priorities of this study. New proposals that are investigated in this PhD research are filtered multi-carrier waveforms, as Generalized Frequency Division Multiplexing (GFDM), and Orthogonal Time Frequency Space (OTFS). Pro and cons of both of them will be examined, defining a complete mathematical framework for the performance metrics analysis.