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

WINNER D5.4 v. 1.4
5.4.5 Distribution of the azimuth angles of the multipath components
The distribution of the azimuth angle of arrivals and angle of departure for both LOS and NLOS
propagation conditions are calculated. Those results are based on superresolution path parameter
estimations or the beamform method. CDFs are presented as well as characteristic parameters as 10%,
50%, 90% and mean of the distribution are extracted.
5.4.5.1 Scenario B1
The azimuth angle of arrivals at the MS (receive) and angle of departure from the BS (transmitter) for
both LOS and NLOS propagation conditions has been extracted from measurement data using
beamforming techniques. It was noted that for LOS conditions there are two propagation mechanisms that
take place for signals arrive the MS. The forward propagation, i.e., direct propagation direction from BS
to the MS, and the backscattering for signals that travel beyond the MS and scatter back to the MS from
the opposite direction. These two sources of arriving signals at the MS make the modelling of the azimuth
arrivals to be different. Figure 5.36 shows the cumulative probability distribution function of arrival
angles at the MS from both directions. The logistic and normal distributions are closer in fitting with
measurement data from that with Laplacian distribution for signals that arrive due to backscattering. In
the forward propagation case, the normal distribution is not in good fit with measurements data. Laplacian
distribution is not in an excellent fitting with measurements but closer. For angle of departure from the
BS to both LOS and NLOS cases the logistic and Laplacian are in better agreement with measurement
data compared to normal distribution as can be seen in Figure 5.37.
(a) DoA due to Backscattering propagation
(b) DoA from forward propagation.
Figure 5.36: Azimuth direction of arrivals of multipath components in LOS cases.
(a) DoD LOS case
(b) DoD NLOS case.
Figure 5.37: Azimuth direction of departure of multipath components in LOS and NLOS cases.
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