ction (LOS) (NLOS) 0-face (0-face = in-face) in-face FIGURE 6.4 The height of the transmitter is above the height of the obstacle and the receiver moves from NLOS to LOS. (6.15) The received field E, at the receiving point when the receiver RX is moved above LOS is given as (6.16) (6.17) All the parameters are defined in Case 1. Consideration of the three cases The above cases consider all of the possible scenarios for the prediction of the received field over a series of obstacles (namely, irregular terrain) using the UTD-PO approach. Also, during the prediction of the field over multiple obstacles, the received field at any intermediate points is considered as a point source or virtual transmitting point to predict the field further. In this way, we have considered all of the possible paths between the transmitting and the receiving point to compute the received fields when the receiver if moved vertically from NLOS to LOS. 5G Wireless Communication System in Healthcare Informatics Now, the path loss for using the UTD-PO approach to knife edge obstacles is given as L(dB)=-20.10gm (6.18) E'o is the free space electric field with no obstacles present between the transmitting and the receiving points. Now, we calculate the path loss over irregular terrain using the FKE approach. Prediction of path loss for radio propagation due to diffraction of radio waves over irregular terrain is difficult because it is complex in nature. Therefore, the irregular terrain is considered as a knife edge or single screen obstacles having equal 0th-face and nth-face. This way we reduce the structural complexity of the irregular terrain scenario to study the proposed approach. In this approach, we consider a knife edge obstacle of relative effective height hoeff with an infinite width such that no propa- gation takes place through the sides of the knife edge obstacles. Propagation only takes place through the rooftop of the knife edge obstacles. This obstacle is placed at geometric distance W1 and radial distance d from the transmitt