Propagation characteristics of WBAN channel in hospital scenarios at 10GHz

The propagation characteristics of wireless body area network (WBAN) under the hospital environments at 10GHz are studied for exploring the feasibility of indoor high frequency communication. Based on the extensive measured data in the hospital room and corridor scenarios, a new path loss (PL) model with the antenna angle factor (called as AAF) is proposed, where AAF is used to characterize the influence of angle change of a wearable or handheld device of the human body on the PL. Moreover, the expression of AAF is presented, which is a trigonometric functional of the angle of receiving antenna. In addition, the statistical characteristics of the time-domain root-mean-square delay spread (RMS-DS) are given under the two hospital scenarios, and a novel RMS-DS model is also presented. In the proposed model, the RMS-DS is expressed as a linear function of PL, and a normal random variable is employed to describe the deviation between the measured RMS-DS and the linear function. The validity of the proposed models is verified in the different hospital environments, and the simulation results show that the proposed models have higher accuracy and better adaptability than the existing models.