Research on Orbital Angular Momentum Different Modes Networking Method in Wireless Communication

Abstract

Orbital angular momentum (OAM) has been a popular topic due to the natural orthogonality of OAM waves with different modes. It is expected to greatly improve the channel capacity of wireless communication systems. From the perspective of networking, this letter proposes an OAM-based different modes networking method (OAM DMN) that sets adjacent cells with OAM carriers of different modes, so as to improve the signal quality and spectrum efficiency of wireless network and better adapt to the high-density base station distribution scenario. This letter firstly analyzes the characteristics of atmospheric channel on OAM waves by regarding turbulent as random phase screen based on Kolmogorov turbulence theory. Combining with stochastic geometry, we get the outage probability function of wireless cells. Then two types of OAM DMN schemes are proposed to test the performance of the network under different channel conditions. Simulation shows that OAM DMN wireless network has lower outage probability compared with other OAMbased and conventional networks and better performance on high-density base station distribution.

Cooperative Orbital Angular Momentum Wireless Communications

“…The optimal uniform circular array (UCA) design was proposed to select the OAM mode and radius of receive UCA for OAM wireless backhaul communications [14]. To improve the spectrum efficiency, the authors of [15] proposed an OAM mode allocation method, which provided adjacent cells with different carriers of different OAM modes. To date, the research on OAM mode multiplexing has made great progress in wireless communications [16], [17].…”