Open AccessDemostration of 520 Gb/s/λ pre-equalized DFT-spread PDM-16QAM-OFDM signal transmission
Author(s) -
Fan Li,
Jianjun Yu,
Zizheng Cao,
Ming Chen,
Junwen Zhang,
Xinying Li
Publication year - 2016
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.24.002648
Subject(s) - orthogonal frequency division multiplexing , quadrature amplitude modulation , equalization (audio) , transmission (telecommunications) , fast fourier transform , electronic engineering , computer science , qam , signal (programming language) , multiplexing , bit error rate , channel (broadcasting) , telecommunications , optics , physics , algorithm , engineering , programming language
In this paper, we successfully transmit 8 × 520 Gb/s pre-equalized DFT-spread PDM-16QAM orthogonal frequency-division multiplexing (OFDM) signal over 840 km SMF with BER under 2.4 × 10(-2). We discuss how to obtain accurate tranceivers' response during pre-equalization for DFT-spread OFDM with coherent detection and we find conventional OFDM symbols training sequences (TSs) outperform DFT-spread OFDM symbols TSs in obtaining channel response for pre-equalization and equalization. Additionally, the optimal IFFT/FFT size is explored for the pre-equalized DFT-spread PDM-16QAM-OFDM transmission systems. It is the first time to realize 400 Gb/s/λ net rate OFDM signal transmission.