Subcarrier spacing common nr

1. What are the subcarrier spacing available in NR?
2. Why subcarrier spacing is 15 KHz in LTE?
3. What is subcarrier spacing?
4. What is the sub frame duration in NR?

What are the subcarrier spacing available in NR?

Subcarriers in cellphones, LTE 4G and 5G NR

In LTE, each subcarrier is spaced 15 kHz apart.

Why subcarrier spacing is 15 KHz in LTE?

Simply, It is because 3G and LTE have the same clock timing for multi technology handsets.

What is subcarrier spacing?

Subcarrier spacing is equal to the reciprocal of the symbol time. As a result of the longer symbol time, the subcarrier size and spacing decreases from 312.5 KHz to 78.125 KHz. The narrow subcarrier spacing allows better equalization and therefore enhanced channel robustness.

What is the sub frame duration in NR?

In the time domain, the subframe length of NR is 1 ms, which is composed of 14 OFDM symbols using 15 kHz subcarrier spacing and normal CP. A subframe is composed of an integer number of slots, and each slot consists of 14 OFDM symbols.