On the Feasibility of High Speed Railway mmWave Channels in Tunnel Scenario

Table 3

Channel fading characteristics statistics.

Setups	Direc.-Direc.		Direc.-Omni.		Omni.-Omni.
Path loss exponent ()
Min	1.06		1.06		1.07
Mean	1.10		1.10		1.11
Max	1.13		1.13		1.13
Shadow fading standard deviation () [dB]
Min	3.32		3.39		3.42
Mean	3.43		3.49		3.47
Max	3.49		3.54		3.51
Decorrelation distance [m]
10%	1.20	1.60	0.90	1.40	0.80	1.00
50%	2.03	2.75	1.89	2.60	1.73	2.30
90%	3.81	5.01	3.41	4.70	3.34	4.31
Mean	2.46	3.36	2.08	3.09	1.89	2.68
Rician -factor [dB]
Regions	Near	Far	Near	Far	Near	Far
10%	5.90	−7.79	5.78	−8.28	3.75	−8.29
50%	19.48	−6.98	10.59	−7.47	7.28	−7.48
90%	36.57	−2.29	20.85	−3.60	12.62	−4.64
Mean	20.31	−5.80	12.28	−6.54	7.80	−6.85
Root mean square delay spread [ns]
Regions	Near	Far	Near	Far	Near	Far
10%	0.11	0.40	0.67	0.44	2.62	0.44
50%	0.32	0.47	1.94	0.52	4.82	0.58
90%	5.72	0.54	5.72	0.69	5.72	1.20
Mean	2.12	0.47	2.97	0.54	4.42	0.70
Root mean square Doppler spread [kHz]
Regions	Near	Far	Near	Far	Near	Far
10%	0.40	0.40	0.41	0.40	0.50	0.40
50%	0.42	0.41	0.55	0.41	0.94	0.41
90%	2.46	0.42	2.46	0.42	2.45	0.42
Mean	0.95	0.41	1.04	0.41	1.20	0.41
[dB]
Regions	Near	Far	Near	Far	Near	Far
10%	10.44	−5.80	8.07	−6.47	5.44	−6.61
50%	28.45	3.00	18.72	2.20	14.17	2.26
90%	41.11	12.93	29.03	12.63	23.45	12.77
Mean	26.84	3.13	18.66	2.54	14.34	2.49
[dB]
Regions	Near	Far	Near	Far	Near	Far
10%	10.52	−7.99	8.28	−8.99	5.41	−8.98
50%	28.43	1.66	18.21	1.23	11.53	0.90
90%	41.21	10.81	28.52	10.43	20.10	10.11
Mean	26.90	1.38	18.33	0.80	12.23	0.63