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Table 1 1024-FFT/IFFT parameters in 20 MHz bandwidth

From: Spectral broadening effects of high-power amplifiers in MIMO–OFDM relaying channels

Parameter Value
Channel bandwidth 20 MHz
Modulation 4-QAM
Number of DC subcarriers 1
Number of guard subcarriers, left 80
Number of guard subcarriers, right 79
Number of data subcarriers 864
Subcarrier frequency spacing, Δf 19.53125 KHz (= 20 MHz/1024)
IFFT/FFT period, TFFT 51.2 μs
Cyclic prefix duration, TCP 6.4 μs (TFFT/8)
Total OFDM symbol duration, TS 57.6 μs