Experimental Characterization of LTE Wireless Links in High-Speed Trains

Table 4

Path loss parameters (, , and ) estimated for both north (N) and south (S) sectors and for each of the four receive antennas: two of them are placed inside the train car (“indoor ant. 1” and “indoor ant. 2”) and the other two are placed outdoors, on the train roof (“outdoor ant. 1” and “outdoor ant. 2”). The results are obtained considering a single active sector (north or south), that is, the sector whose antennas are transmitting. The column TX specifies the active sector, whereas the column RX denotes the sector along which the measurements are performed.

TX	RX	Outdoor ant. 1			Outdoor ant. 2			Indoor ant. 1			Indoor ant. 2
		N	N	3.20	135.61	3.84	2.53	113.34	4.08	3.33	120.88	3.18	3.17	115.93	2.85
S	2.23		78.63	2.76	1.80	64.94	1.83	1.20	36.94	4.38	0.74	26.75	1.06
S	N	2.06	78.44	1.91	2.23	78.70	1.78	1.82	58.16	2.09	1.89	60.96	1.56
	S	2.29	110.00	3.74	2.32	103.36	1.68	2.64	100.89	2.70	2.58	98.91	2.39