We propose the first adaptive bit-and-power loading scheme for OFDM-NOMA-PON and demonstrate in a 54-Gbit/s 20-km PON that this scheme outperforms conventional OFDM- NOMA and DFT-S-OFDM-NOMA when ONUs have different transmission distances or different power loss.

We propose a novel orthogonal circulant multiplexing technique based on the chirp-like polyphase sequence and show in 115.8-Gbit/s IM/DD experiments with 10-GHz-class devices that this scheme outperforms OFDM, DFT-spread OFDM, OCT-precoded OFDM and OCDM.

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We propose a novel DCrT-S-ACO-OFDM based on chirp-like polyphase sequences. Experiments of a 34.4-Gbit/s direct-detection ACO-OFDM system under 10-GHz system bandwidth limitation show that the proposed scheme outperforms conventional ACO-OFDM, DFT-S-ACO-OFDM and OCT-precoded ACO-OFDM.

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