Table 1 Simulation parameters

Half power beamwidth of LED

60°

Transmit power (optical) (P)

1 W

Responsitivity of PD (R_pd)

0.63 [A/W]

Area of PD (A_pd)

150 mm²

Reflection coefficient of glass (n_g)

1.5

Feedback resistance of TIA (R_F)

6 kΩ

System bandwidth (B)

20 MHz

Temperature (T)

300 K

Background radiation (P_bg)

6 mW/cm²/nm

Bandwidth of optical filter (λ_of)

300 nm

Coding

3/4-rate convolutional

BPSK, QPSK, cross 8-QAM,

Modulation format

16-QAM, cross 32-QAM, 64-QAM,

cross 128-QAM and 256-QAM

SINR target (Γ) [dB]

2.2, 5.2, 9.1, 11.3, 14.4,16.6,

19.5, 22.5