Howtosignalprocessing
- How to calculate FFT size in LTE?
- What is FFT size in OFDM?
- What is the relation between FFT size and number of sub carriers?
How to calculate FFT size in LTE?
A = 160 x (FFT size for 10 Mhz/FFT size for 20 Mhz) = 160 x (1024/2048) = 80. B = 144 x (FFT size for 10 Mhz/FFT size for 20 Mhz) = 144 x (1024/2048) = 72. C = 2048 x (FFT size for 10 Mhz/FFT size for 20 Mhz) = 2048 x (1024/2048) = 1024.
What is FFT size in OFDM?
For this version the FFT size is fixed at 256, which 192 subcarriers used for carrying data, 8 used as pilot subcarriers for channel estimation and synchronization purposes, and the rest used as guard band subcarriers.
What is the relation between FFT size and number of sub carriers?
The number of subcarriers = the size of the FFT.
