It's important to establish an effective UWB MIMO propagation indoor model for designing a system.In this paper

we developed a 3-D UWB MIMO channel model using the Ray Tracing method in the time domain

based on ray mechanisms of georrretrical optics(GO) and uniform geometrical theory of diffraction(UTD) in the time domain.Accading to the simulation results for the indoor channel

the following conclusions were obtained.The deep fading could be improved by using two transmitting antennas than one transmitting antenna

but the fast fading turns out worse.The receiving perforrrrance can be improved with multipath receiving rriethod.The vertical polarization receiving is stronger than other receiving directions when the transmitting antenna is vertically polarized.The correlation of the channels when the antenna is placed in the middle of a room is better than the correlation when the antenna is at one side of the room.Using two transmitting antennas could also improve the correlation than using one.