Journal of Computer Networks and Communications / 2010 / Article / Tab 1

Research Article

Capacity Evaluation for IEEE 802.16e Mobile WiMAX

Table 1

OFDMA parameters for Mobile WiMAX [3, 8, 9].

Parameters Values

System bandwidth (MHz) 1.25 5 10 20 3.5 7 8.75
Sampling factor 28/25 8/7
Sampling frequency (Fs,  MHz) 1.4 5.6 11.2 22.4 4 8 10
Sample time (1/Fs, nsec) 714 178 89 44 250 125 100
FFT size (NFFT) 128 512 1,024 2,048 512 1,024 1,024
Subcarrier spacing (Δf, kHz) 10.93 7.81 9.76
Useful symbol time (Tb=1/Δf, μs) 91.4 128 102.4
Guard time (Tg=Tb/8, μs) 11.4 16 12.8
OFDMA symbol time (Ts=Tb+Tg, μs) 102.8 144 115.2