B.3.1 Single Tap Channel Profile

38.521-43GPPNRPart 4: PerformanceRadio transmission and receptionRelease 17TSUser Equipment (UE) conformance specification

The high speed train condition for the test of the baseband performance is a non-fading propagation channel with one tap. Doppler shift is given by

(B.3.1.1)

where is the Doppler shift and is the maximum Doppler frequency. The cosine of angle is given by

, (B.3.1.2)

, (B.3.1.3)

, (B.3.1.4)

where is the initial distance of the train from gNB, and is gNB Railway track distance, both in meters; is the velocity of the train in m/s, is time in seconds.

Doppler shift and cosine angle are given by equation B.3.1.1 and B.3.1.2-B.3.1.4 respectively, where the required input parameters listed in table B.3.1-1 and the resulting Doppler shift shown in Figures B.3.1-1, B.3.1-2, B.3.1-3, B.3.1-4 are applied for all frequency bands.

Table B.3.1-1: High speed train scenario

Parameter	Value
	HST-750	HST-972	HST-1000	HST-1667
	300 m	300 m	300 m	300 m
	2 m	2 m	2 m	2 m
	300 km/h	500 km/h	300 km/h	500 km/h
	750 Hz for 15 kHz SCS test	972 Hz for 15 kHz SCS test	1000 Hz for 30 kHz SCS test	1667 Hz for 30 kHz SCS test

Note 1: Parameters for HST conditions in table B.3.1-1 including and Doppler shift trajectories presented on figures B.3.1-1 for 750 Hz and B.3.1-3 for 972 Hz for 15 kHz SCS and figures B.3.1-2 for 1000 Hz and B.3.1-4 for 1667 Hz for 30 kHz SCS are applied for performance verification in all frequency bands.

Note 2: The propagation conditions used for the performance requirements under high speed train condition are indicated as a combination of “HST” and Doppler shift, i.e. HST-<Doppler shift>, where ‘<Doppler shift>‘indicates the maximum Doppler shift (Hz).

Figure B.3.1-1: Doppler shift trajectory (= 750 Hz)

Figure B.3.1-2: Doppler shift trajectory (= 1000 Hz)

Figure B.3.1-3: Doppler shift trajectory (= 972 Hz)

Figure B.3.1-4: Doppler shift trajectory (= 1667 Hz)

For 1×2 antenna configuration, the same h(t,τ) is used to describe the channel between every pair of Tx and Rx.

For 1×4 antenna configuration, the same h(t,τ) is used to describe the channel between every pair of Tx and Rx.