Howtosignalprocessing
Subcarriers in cellphones, LTE 4G and 5G NR In LTE, each subcarrier is spaced 15 kHz apart. These subcarriers are combined in groups of 12 to form a single resource block.
- What is subcarrier spacing?
- What is subcarrier spacing SCS?
- Why are there different subcarrier spacing in 5G?
- Why subcarrier spacing is 15kHz?
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 subcarrier spacing SCS?
Subcarrier spacing (SCS),
It can be any value from 15/30/60/120/240/480 KHz based on 5G NR numerology parameter, μ which has value 0 to 5. For μ = 0, SCS of 15 KHz is used, for μ = 1, SCS of 30 KHz is used and so on.
Why are there different subcarrier spacing in 5G?
Wider subcarrier spacing would provide better resistance to such increased Doppler shifts at higher frequency bands. Furthermore, 5G NR provides a flexible solution to support various applications by choosing an appropriate configuration. For example, when higher Δf is used, it results in a shorter slot duration.
Why subcarrier spacing is 15kHz?
Simply, It is because 3G and LTE have the same clock timing for multi technology handsets.
