Capacity Performance of Wireless Oam-Based Massive Mimo System

Abstract

Orbital angular momentum (OAM) as a powerful candidate to enhance the spectral efficiency and system capacity by providing the new degree of freedom for multiplexing has been recently advocated in wireless communications. In this paper, we propose an OAM-based massive multiple-input multiple-output (MIMO) scheme to significantly improve the transmission performance of wireless communication system in line-of-sight scene. The uniform rectangular arrays (URAs) are used as transceivers in our system model, and the ideal OAM antenna model that is capable of providing OAM-channel independently is used as the array element. Multiple reference coordinate systems based on per transmitting antenna and the cumulative phase of specific radio vortices are used to describe the OAM-MIMO channel model. The results of numerical analysis indicate that the proposed OAM-based massive MIMO system could obtain an overwhelming capacity gain against the conventional MIMO system.

Finite-aperture Microwave Bessel Beams with Vortex Twisting, Fracturing, and Dynamic Phase-shift Control

“…Optical tweezers for manipulation of microscopic objects are a prominent example. Optical communication is another area where the OAM beams can increase the capacity of channels [2,3], enhance the encoding, and provide other benefits [4]. Microwave vortex beams are also of interest for wireless communication [5][6][7] and radars [8][9][10].…”

Massive OAM‐MIMO transmission scheme for 5G networks and beyond

“…As the basis of channel matrix-based performance analysis, OAM-MIMO systems are so far mainly configured by UCA [29][30][31][32][33][34], uniform line array (ULA) [35][36][37][38], and uniform rectangular array (URA) [39]. System models of OAM-MIMO in the cases of line-of-sight (LoS) [40][41][42], non-LoS (NLoS) FIGURE 1 Uniform line array (ULA)-based massive orbital angular momentum and multiple-input multiple-output (OAM-MIMO) system in the multipath scene [38,43,44], alignment [29,45] and misalignment [33,34,44] were preliminarily analysed, which show many positive results about OAM-MIMO increasing the spectrum efficiency.…”