Orthogonal Circulant Multiplexing based on the Chirp-Like Polyphase Sequence in Short-Reach IM/DD Systems

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.