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This part of the example shows the response of a multipath fading channel to a constant input. The MULTIPATH_FADING block is configured to simulate a standard GSM Rural Area channel profile with 6 paths. The vehicle velocity is set to an unrealistically large value of 400e3 km/h in order to be able to observe the shape of the channel output spectrum. The GSM Rural Area profile contains a Rice fading tap with the specular component at 70% of the maximum Doppler spread, and 5 Rayleigh fading components, all with pre-determined delay/attenuation values. The temporal and spectral responses at the output of the channel are shown.
The GSM channel profiles are defined in the following reference:
 3GPP TS 45.005 V6.7.0 (2004-11), "Radio Access Network; Radio transmission and reception (Release 6)"
This part of the example illustrates an antenna array at the receiver. Array element locations are defined in a two-dimensional plane as a function of the wavelength. The channel imposes a simple frequency shift FO on the input signal, which is assumed to be received from an angle of incidence AOI. The values FO and AOI are swept over a range of values and the temporal and frequency response at each array element is shown in the two corresponding graphs.
This part of the example illustrates a MIMO channel with two inputs and two outputs. Fading between each of the TX and RX antennal elements is assumed to be independent. The fading profile for each TX/RX antenna element pair is modeled as a GSM Rural Area 6 path profile. Again, the vehicle velocity is set to an unrealistically large value to be able to observe the spectral response of the channel.