In this paper, we will propose a novel approach to the radio propagation channels in complex indoor environments firstly. This technique is called the deterministic splitting method of ray tubes(DSMRT). The DSMRT is optimized for predicting indoor radio channel which can overcome the drawback of the ADRTT. At the same time, the DSMRT has the merits of less CPU time and higher computing efficiency, compared with two known methods of ray tubes on the condition of same prediction precision in.Meanwhile ,the prediction of received power in frequency-domain has been done with this method in indoor environment. Secondly, we will apply DSMRT to time-domain prediction of radio propagation characteristics. It is well known that a time-domain multipath channel model is developed based on TD-UTD technique. We choose the same typical office environments as to model. A good agreement is achieved between the simulated results and the published results.
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