Channel Estimation and Peak-to-Average Power Ratio Analysis of Narrowband Internet of Things Uplink Systems

Table 2

Characterization of resource unit (RU).

Subcarrier spacing	No. of subcarriers	No. of slots	No. of SC-FDMA symbols	Tx time interval (TTI)
3.75 kHz	1	16	112	32 ms
15 kHz	1	16	112	8 ms
	3	8	56	4 ms
	6	4	28	2 ms
	12	2	14	1 ms