Page 273 - Integrated Wireless Propagation Models

M i c r o c e l l P r e d i c t i o n M o d e l s 251

(a)

MS

Incident wave
(b)
FIGURE 4.5.5.3.1.1 Defin i tion of parameters for the NLOS1 case.

The NLOS path loss L Nws1 can be expressed as

for L,1 + L msd > 0
(4.5.5.3.1.1)
rts 0
for L + Lmsd :s;
The free space loss is given by

1
L b 1 = 32.4 + 20 log10 (� ) + 20 log 0 (j) (4.5.5.3.1.2)
000
where d = path length (m) andf = frequency (MHz).
The diffraction loss L,15 describes the loss after the wave propagating along the mul­
tiple-screen path and diffracted into the street where the mobile station is located. It
takes into account the width of the street and its orientation:

(4.5.5.3.1.3)