Modelling and Optimization of OAM-MIMO Communication Systems with Unaligned Antennas

Abstract

The orbital angular momentum (OAM) wireless communication technique is emerging as one of potential techniques for the Sixth generation (6G) wireless communication system. The most advantage of OAM wireless communication technique is the natural orthogonality among different OAM states.However, one of the most disadvantages is the crosstalk among different OAM states which is widely caused by the atmospheric turbulence and the misalignment between the transmitting and receiving antennas. Considering the OAM-based multiple-input multiple-output (OAM-MIMO) transmission system with unaligned antennas, a new channel model is proposed for performance analysis. Moreover, a purity model of the OAM-MIMO transmission system with unaligned antennas is derived for the non-Kolmogorov turbulence. Furthermore, the error probability and capacity models are derived for OAM-MIMO transmission systems with unaligned antennas. To overcome the disadvantage caused by the unaligned antennas and non-Kolmogorov turbulence, a new optimization algorithm of OAM state interval is proposed to improve the capacity of the OAM-MIMO transmission system. Numerical results indicate that the capacity of OAM-MIMO transmission system is improved by the proposed optimization algorithm. Specifically, the capacity increment of the OAM-MIMO transmission system adopting the proposed optimization algorithm is up to 28.7% and 320.3% when the angle of deflection between the transmitting and receiving antennas is -24 dB and -5 dB, respectively.

How to Game-theoretically Disentangle & Control the Efficiency of Orbital Angular Momentum

“…Step 7. Now, the irradiance is as [1]- [12] the absolute-value of the sume of the OAM beams − Laguerre Gaussian ones etc. Now, let us go in another zone by a transformation ap- plication.…”

“…I N 1992 and by Allen et al, the idea of optical vortex was combined to the issue of the orbital angular momentum (OAM) [1]- [12]. The OAM technique implemented according Manuscript received XX, 20YY; revised X XX, XXXX.…”