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

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 OAM-based and conventional networks and better performance on high-density base station distribution.