Table 2 Main OFDMA and frame parameters of IEEE 802.16 m
Parameter | Description | Value | |
|---|---|---|---|
| Â | Â | TDD | FDD |
BW | Total bandwidth | 20 MHz | 2 × 10 MHz |
N FFT | Number of points in full FFT | 2048 | 1024 |
F s | Sampling frequency | 22.4 MHz | 11.2 MHz |
Δ f | Subcarrier spacing | 10.9375 kHz | |
To = 1/Δ f | OFDMA symbol duration without cyclic prefix | 91.43 μs | |
CP | Cyclic prefix length (fraction of T0) | 1/16 | |
T s | OFDMA symbol duration with cyclic prefix | 97.143 μs | |
T f | Frame length | 5 ms | |
N F | Number of OFDMA symbols in frame (excluding switching gaps) | 50 | 51 |
R DL-UL | Ratio of DL to UL | Five DL subframes, three UL subframes | Eight DL subframes for DL and UL |
T duplex | Duplex time | TTG + RTG = 165.71 μs | N/A |