B.3A HST-SFN scenario

36.521-13GPPEvolved Universal Terrestrial Radio Access (E-UTRA)Part 1: Conformance testingRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification

There is an infinite number of RRHs distributed equidistantly along the track with the same Cell ID as depicted in figure B.3A-1.

Figure B.3A-1: Deployment of HST-SFN

The location of RRH k is given as:

(B.3A.1)

where: , and is the distance between the RRHs and railway track, while is the distance of two RRHs, both in meters.

The train location is denoted as:

(B.3A.2)

where: and a means distance in meters, which means the train is right on the track.

The HST-SFN scenario for the test of the baseband performance is a non fading propagation channel with four taps, namely the four nearest RRHs. Thus RRH k is visible for the train only in the range:

(B.3A.3)

Power level (dB) for the signal from kth RRH, normalized to the total power received from all visible RRHs, is given by:

for (B.3A.4)

Doppler shift (Hz) from kth RRH is given by:

for (B.3A.5)

The relative delay (s) for the signal from kth RRH can be derived as:

for (B.3A.6)

In the above v (m/s) is the moving speed of the train, f_C (Hz) is the centre frequency, and C (m/s) is the velocity of light.

Power level, Doppler shift and relative delay are given by equations B.3A.4 ~ B.3A.6 respectively, where the required input parameters listed in table B.3A-1 and the resulting Doppler shift shown in Figure B.3A-3 are applied for all frequency bands.

Table B.3A-1: HST-SFN scenario

Parameter	Value
	1000 m
	50m
	350 km/h
	872 Hz

NOTE 1: Parameters for HST-SFN scenario in Table B.3A-1 includingand Doppler shift trajectories presented in Figure B.3A-2 were derived from Band 7 and are applied for performance verification in all frequency bands. And the trajectories of relative power, Doppler shifts and relative delay presented in Figures B.3A-2~ B.3A-4 are derived from the equations B.3A.4 ~ B.3A.6 respectively.

Figure B.3A-2: Relative power level trajectories

Figure B.3A-3: Doppler shifts trajectories

Figure B.3A-4: Relative delay trajectories

For 2×2 antenna configuration, the same h(t,τ) is used to describe the channel between every pair of Tx and Rx with phase shift according to .