oving vertically from NLOS (no line-of- sight) to LOS (line-of-sight) as shown in Figure 6.2. The received field E, at the receiving point when receiver Rx is below the NLOS is given as (6.2) (6.3) UTD-PO and FKE Models for Path Loss Prediction The received field E, at the receiving point when the receiver Rx is moved above the LOS is given as (6.4) (6.5) Where, (6.6) (6.7) (6.8) (6.9) Where: k represents the wave number, D represents the knife edge diffraction coefficient [18], Oi represents the incident angle from the 0th face of the knife edge obstacle, 0d represents the diffracted angle from the 0th face of the knife edge obstacle, L represents the distance parameter, R 1 1 represents the radial distance between the transmitter T and the receiver T1, W1 represents the geometric distance between the transmitter Tx and the knife edge obstacle, W2 represents the geometric distance between the knife edge obstacle and the receiverT W's represents the radial distance between the knife edge obstacle and the receiver Tx Case 2: When the height hix of the transmitter Tx is equal to the height of obstacle hobp and the receiving point RX of height hrx is moving vertically from NLOS to LOS as shown in Figure 6.3. The received field E, at the receiving point when receiver Rx is below the NLOS and is given as (6.10) 5G Wireless Communication System in Healthcare Informatics (LOS) (NLOS) 0-face (0-face = in-face) in-face FIGURE 6.3 The height of the transmitter is equal to the height of the obstacle, and the receiver moves from NLOS to LOS. (6.11) The received field E, at the receiving point when the receiver R is moved above the LOS and is given as (6.12) (6.13) All the parameters are defined in Case 1. Case 3: When the transmitter T of height hix is above the height of obstacle hobp and the receiving point Rx of height hrx is moving vertically from NLOS to LOS as shown in Figure 6.4. The received field E, at the receiving point when receiver RX is below the NLOS is given as (6.14) UTD-PO and FKE Models for Path Loss Predi