Experimental Characterization of Ultra-Wideband Channel Parameter Measurements in an Underground Mine

Table 4

RMS delay spread in LOS and NLOS cases with directive Antenna.

Rms delay spread (ns)	Level 70			Level 40
	Mean	Std	Max	Mean	Std	Max
LOS	1.762	0.727	2.837	2.0182	1.101	3.419
NLOS	4.578	2.141	7.061	5.985	4.985	11.049