Table 1 Simulation parameters

Transmission bit rate

10 Mbps

Modulation

QPSK

Number of subcarriers

64

Spreading sequences

Walsh-Hadamard

Channel model

As in (2) [8]

Equalization

Single-tap frequency domain

pre- and post-equalization

Digital-to-analog converter (DAC)

Rectangular pulse

H(0) (DC channel gain)

−60 dB [8]

N₀ (noise variance)

10 ⁻²³ A²/Hz [8]

D (rms delay spread)

10 ns [8]

R (photodetector responsivity)

1 A/W [8]

Transmit power calculation

As per multi-carrier optical

wireless communications