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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