Channel Characteristics of Rail Traffic Tunnel Scenarios Based on Ray-Tracing Simulator

Table 5

Small scale parameters.

Parameter	Mean K-factor	Percentage of K25 dB	Mean; delay spread	95 % of delay spread range
Tunnel a	13.7	88%	0.47	0.31-0.76
Tunnel b	14.98	86%	0.37	0.09-0.75
Tunnel c	10.82	94.8%	0.33	0.17-0.66
Tunnel d	14.46	87%	0.40	0.16-0.80