Propagation at mmW Band in Metropolitan Railway Tunnels

Table 2

Path loss model parameters at the vertical and horizontal polarization directions.

	Vertical	Horizontal
Ref. attenuation,	64.8 dB	62.9 dB
Measurement	1.28	1.29
Simulation	1.8	1.9
Modal propagation model	1	1.1
Measurement	1.4 dB	1.3 dB
Simulation	1.2 dB	0.9 dB

The attenuation is at the reference point, , of 20 m. is referred to the parameters in (7), as and .