Iteration SSII cancellation in DD-OFDM PON upstream scheme

Iteration interference cancellation algorithm is proposed in direct detection OFDM PON upstream scheme to mitigate subcarrier to subcarrier intermixing interference (SSII) caused by dispersion and square-law photo-detection. The receiver sensitivity is improved by 1 dB in 20-Gbps, 16-QAM OFDM PON upstream experiment after 100-km standard single mode fiber (SSMF) transmission.