Modeling and analysis of massive MIMO channel based on air-to-ground.

In order to study the channel transmission characteristics of three-dimensional massive multiple input multiple output (m-MIMO) antenna arrays in an air-to-ground (A2G) environment, an A2G MIMO channel model of unmanned aerial vehicle (UAV) and vehicles with spherical scatterers is proposed. Compared with the previous air ground m-MIMO models, fee influence of mutual coupling on antenna arrays is considered in the modeling process, and the non-stationay chaacteristics of m-MIMO antenna ae analyzed and modeled in the birth-death process. The cross-correlation function of the UAV and ca in different height, direction and time at any moving state and fee influence of different angle expansion on channel capacity ae derived. Simulation results ae compared with the measured data in previous literature. It is shown that fee characteristics of the channel model fit well wife the actual measurement results. By analyzing the fading channel data, increasing fee spacing and number of antennas and controlling the flight altitude and pitch angle of UAV can effectively improve fee channel capacity within limits, which lays a foundation for the design of advanced signal processing technology of antenna arrays in large-scale m-MIMO and directional antenna used in fee aviation communication link. [ABSTRACT FROM AUTHOR]