Design and Analysis of High-Capacity MIMO System in Line-of-Sight Communication

The phase of the channel matrix elements has a significant impact on channel capacity in a mobile multiple-input multiple-output (MIMO) communication system, notably in line-of-sight (LoS) communication. In this paper, the general expression for the phase of the channel matrix at maximum channel capacity is determined. Moreover, the optimal antenna configuration of the 2 x 2 and 3 x 3 transceiver antenna array is realized for LoS communication, providing methods for nxn optimal antenna placement, which can be used in short-range LoS communication and non-scattering environment communication, such as coupling train communication and inter-satellite communication. Simulation results show that the 2 x 2 rectangular antenna array is more suitable for the communication of coupling trains, while the 3 x 3 circular arc antenna array is more suitable for virtual coupling trains according to antenna configurations. Moreover, the 2 x 2 antenna rectangular configuration proposed in this paper has reached the optimal channel in inter-satellite communication, which lays a foundation for the deployment of communication systems.

Automated summary

The phase of channel matrix elements greatly affects channel capacity, especially in line-of-sight communication. This paper determines the general expression for the channel matrix phase at maximum channel capacity and proposes optimal antenna configurations for LoS communication. Simulation results show that different antenna configurations are suitable for different communication scenarios.