Table 1 OFDMA network model

Carrier frequency

2 GHz

Transmission bandwidth

10 MHz

OFDMA subcarrier spacing

15 kHz

Number of useful subcarriers

600

Number of points of FFT

1024

Cyclic prefix length

72 samples

TTI duration (simulation step)

1 ms

Sampling frequency

15.36 MHz

Number of OFDM symbols per TTI

14

Inter-site distance

2 km

Path loss exponent

3.5

Std of shadow fading

8 dB

Channel model

ITU typical urban 20 paths

Mobile speed

3 km/h

Base station transmission power

40 W

Number of interfering cells

12

Antenna rx scheme

2-rx MRC

Bandwidth granularity of scheduling assignments

1 subcarrier