A geometry-based stochastic scattering model (GBSSM) based on geometrical multiple rings and ellipses is proposed for wideband multiple-input multiple-output (MIMO) mobile-to-mobile (M2M) fading channels.The proposed GBSSM is deployed with cross-polarized antennas and can be applied for the line-of-sight (LOS) and non-LOS (NLOS) scenarios by considering the single-bounced (SB) and double-bounced (DB) components.The channel realization is much more straightforward and concise to study the channel characteristics compared with the too complicated analytical solutions available so far.Based on the proposed GBSSM and realized channel,the channel characteristics and parameters at 2 GHz and 5 GHz with 100 MHz bandwidth are further investigated.The results can be used in the link and system level simulations in M2M radio systems.