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

WINNER D5.4 v. 1.4
Heigh_Gain dB
= 0.7h m
(4.44)
where the gain is in dB and the height h
m is in meters. The Doppler modelling is made identical to that of
B5c.
Figure 4.6: Illustration of the considered scenario in B5 NLOS stationary feeder: rooftop to streetlevel.
Figure 4.7: Compensation term.
4.3 Coefficient generation approaches
We have selected two standardized spatial channel models as channel models for initial usage [D5.1],
namely the 3GPP SCM and the IEEE 802.11n model. The former model is only for outdoor and the latter
is only for indoor scenarios. Interestingly, these standards also represent two common but different
approaches to coefficient generation. In the following, we will evaluate the individual advantages and
disadvantages of these approaches. We also examine the issue of creating a model that is not restricted to
Kronecker type spatial correlation.
4.3.1 Stationary stochastic
Example: ETSI BRAN HIPERLAN/2, IEEE 802.11n
Advantages:
• Efficient coefficient generation by correlation of random variables.
Disadvantages:
• Calculation of spatial autocorrelation functions requires numerical integration.
• Two-dimensional filtering across antenna elements and time required.
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