  In this paper, a three-dimensional (3-D) non-stationary wideband
multiple-input multiple-output (MIMO) channel model based on the WINNER+
channel model is proposed. The angular distributions of clusters in both the
horizontal and vertical planes are jointly considered. The receiver and
clusters can be moving, which makes the model more general. Parameters
including number of clusters, powers, delays, azimuth angles of departure
(AAoDs), azimuth angles of arrival (AAoAs), elevation angles of departure
(EAoDs), and elevation angles of arrival (EAoAs) are time-variant. The cluster
time evolution is modeled using a birth-death process. Statistical properties,
including spatial cross-correlation function (CCF), temporal autocorrelation
function (ACF), Doppler power spectrum density (PSD), level-crossing rate
(LCR), average fading duration (AFD), and stationary interval are investigated
and analyzed. The LCR, AFD, and stationary interval of the proposed channel
model are validated against the measurement data. Numerical and simulation
results show that the proposed channel model has the ability to reproduce the
main properties of real non-stationary channels. Furthermore, the proposed
channel model can be adapted to various communication scenarios by adjusting
different parameter values.
