Research Article

BER Performance of Stratified ACO-OFDM for Optical Wireless Communications over Multipath Channel

Table 1

Major simulation parameters.

OFDM parameters
 IFFT/FFT size2048
 Cyclic prefix length64
 Sampling frequency ()100 MHz
 Channel delay spread ()10 ns, 20 ns
Modulation techniques
 STACO-OFDM/eU-OFDMStratum-1Stratum-2Stratum-3
16-QAM8-QAM4-QAM
32-QAM16-QAM16-QAM
64-QAM64-QAM16-QAM
 ACO-OFDM64, 256, 1024-QAM
 DCO-OFDM8, 16, 32-QAM
 Spectral efficiency≈1.5, 2, and 2.5 bits/s/Hz
 Bit rate145 Mbs, 194 Mbs, 242 Mbs