Multi-mode communications in near field exploiting OAM properties


Autoria(s): Torcolacci, Giulia
Contribuinte(s)

Dardari, Davide

Decarli, Nicolò

Lotti, Marina

Data(s)

05/10/2022

Resumo

This dissertation analyzes the exploitation of the orbital angular momentum (OAM) of the electromagnetic waves with large intelligent surfaces in the near-field region and line-of-sight conditions, in light of the holographic MIMO communication concept. Firstly, a characterization of the OAM-based communication problem is presented, and the relationship between OAM-carrying waves and communication modes is discussed. Then, practicable strategies for OAM detection using large intelligent surfaces and optimization methods based on beam focusing are proposed. Numerical results characterize the effectiveness of OAM with respect to other strategies, also including the proposed detection and optimization methods. It is shown that OAM waves constitute a particular choice of communication modes, i.e., an alternative basis set, which is sub-optimum with respect to optimal basis functions that can be derived by solving eigenfunction problems. Moreover, even the joint utilization of OAM waves with focusing strategies led to the conclusion that no channel capacity achievements can be obtained with these transmission techniques.

Formato

application/pdf

Identificador

http://amslaurea.unibo.it/26655/1/Tesi_Magistrale_GT.pdf

Torcolacci, Giulia (2022) Multi-mode communications in near field exploiting OAM properties. [Laurea magistrale], Università di Bologna, Corso di Studio in Telecommunications engineering [LM-DM270] <http://amslaurea.unibo.it/view/cds/CDS9205/>

Idioma(s)

en

Publicador

Alma Mater Studiorum - Università di Bologna

Relação

http://amslaurea.unibo.it/26655/

Direitos

Free to read

Palavras-Chave #Holographic MIMO,Intelligent Surfaces,OAM,Wireless communications,Degrees of Freedom,Near-Field #Telecommunications engineering [LM-DM270]
Tipo

PeerReviewed

info:eu-repo/semantics/masterThesis