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

WINNER D5.4 v. 1.4
The equation for the path loss can now be expressed as:
PL (d) = 38.8 + 36.8 log 10 (d), s = 3.5 dB (5.3)
where d is the distance and s is the standard deviation of the shadow fading.
The equation is valid from 3 m to 50 m. It is assumed that it can be used until 100 m, although this has
not been verified by measurements. From 1 m to 3 m free-space loss formula should be used.
Quite natural assumption is that most part of the path between the MS and BS the signal propagates in the
corridor. Therefore it is slightly surprising that the path loss is much steeper in this case than in the
corridor – corridor propagation. The reason must be in the mechanism by which the wave couples from
the corridor to the room, or vice versa.
5.4.1.2 Scenario B1
The received power is calculated by summing over all antennas and delay bins in power in each
measurement point. The calibration is done based on back to back measurement in anechoic chamber.
Antenna gains are not included in the received power. The fitting of the parameters is done using least
square error method. Path-loss model for LOS propagation condition is presented in Figure 5.15 with
measurements. Equation (5.4) is the path-loss model for LOS case and Equation (5.5) is for NLOS case.
The defined distance in both equations is the direct distance between transmitter and receiver terminals.
Figure 5.15: Path-loss modelling in LOS condition.
LOS path-loss model:
PL = 41.0 + 22.7⋅
log10 (d), σ = 2.3dB
(5.4)
NLOS path-loss model:
where
( d , d ) PL 10n
( d )
PL = +
, σ = 3.1 dB (5.5)
1 2 0
log10
2
PL = .096d
65 and n = −0 .0024 d + 1
2. 8
(5.6)
0
0
1
+
where d 1 and d 2 are shown in Figure 5.16. The model in Equation (5.5) is developed in WINNER project
based on measurement data fitted in [ZRKV04].
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