Final report on link level and system level channel models - Winner

WINNER D5.4 v. 1.4
Figure 5.20: Rural LOS path loss at 5.25 GHz.
Now the equation for the rural LOS path loss was
PL(d) = 44.6 + 21.5 log 10 (d), s = 4.2 dB. (5.8)
where d is the distance and s is the standard deviation of the shadow fading.
The equation is valid from 30 m to the break-point value, see Section 5.6.1. From 1 m to 30 m, the freespace
loss formula should be used.
This is nearly equal to the results achieved in the campaign of the previous year. The final path-loss
model for D1 LOS environment as well as other path-loss models are discussed in Section 5.6.1.
Path-loss was also investigated for longer distances in a separate measurement, where the base station
antenna heights were higher, 19 – 25m, and a narrower bandwidth was used to achieve better sensitivity.
At the same time path losses for rural LOS and NLOS conditions were investigated. The path-loss result
for the longest route is shown in the Figure 5.21. The NLOS condition was defined so that the path loss
exceeded the free-space path loss by 10 dB or more. Three long routes of this kind were measured and
averaged to obtain the NLOS and over-all path-loss equations. LOS results were calculated from the
short-range measurements. However, the long-distance measurements show clearly that very long LOS
propagation conditions are possible in a flat environment like the one near Tyrnävä.
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