Three dimensional non stationary geometry based stochastic model for UAV MIMO Ricean fading channels
In this study, the authors propose a novel three dimensional (3D) non stationary geometry based stochastic model (GBSM) and the corresponding deterministic and stochastic simulation models for non isotropic unmanned aerial vehicle (UAV) multiple input multiple output (MIMO) Ricean fading channels. The proposed GBSM employs a two cylinder model, where the signal is a superposition of line of sight component, single bounced rays around the UAV, single bounced rays around the ground station (GS) single bounced rays on the ground, and double bounced rays. The non stationarity is reflected on the time varying angles of departure and angles of arrival. Since the authors consider the GS to be mobile, the proposed 3D GBSM is general and suitable for UAV aided vehicular communication scenarios. Based on the proposed model, some important channel statistical properties are derived and thoroughly investigated, including the space time correlation function, Doppler power spectral density, envelope level crossing rate and average fade duration. Moreover, the proposed model has the ability to investigate the influence of some unique UAV related parameters on channel characteristics and non stationarity. Finally, excellent agreement is achieved between the reference model and simulation models, demonstrating the feasibility of simulation models as well as the correctness of theoretical derivations.
IET Commun.