Research Article
Adaptive Phase Rolling for Opportunistic Beamforming in OFDMA Systems with a Small Number of Users
Table 1
Simulation parameters.
| Parameters | Values |
| Sampling frequency | 1 MHz | FFT size | 128 | Cyclic prefix length | 16 samples | Number of users () | 1~24 | Number of resource blocks () | 16 | Number of OFDM symbols in RB () | 1 | Number of subcarriers in RB () | 8 | Carrier frequency | 2 GHz | Mobility of users | 3 Km/h | Channel power-delay-profile distribution | Exponential | Root-mean-square delay spread | 0.67 s | Channel signal-to-noise ratio | 10 dB | Phase rotation speed () | | Scheduling algorithm | Proportional fairness | Window size () | 4 | Weighting factor () | 0.1 |
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