Driven by the ever-increasing capacity demands, the 50G passive optical network (PON) is maturing gradually. One of the main challenges for the 50G PON is implementing burst-mode digital signal processing (BM-DSP) for the burst upstream signal. In this paper, we demonstrate a real-time BM-DSP for burst reception of 25Gbit/s on-off keying signal to meet the asymmetric-mode 50G PON demand. The real-time BM-DSP includes the BM frequency-domain timing recovery and BM frequency-domain equalizer, which can be fast converged based on the 42ns designed preamble. Meanwhile, the simplified implementations for fast-Fourier-transform, minimum-mean-square-error, and decision-directed least-mean-square-error algorithms decrease the DSP resources by 28.57%, enabling the loading of real-time BM-DSP in the field programmable gate array with the limited DSP resources. The real-time implementation of BM-DSP can guide the design of application-specific integrated circuits for 50G PON.
@article{arxiv.2503.02252,
title = {Real-Time Burst-Mode Digital Signal Processing for Passive Optical Networks},
author = {Ji Zhou and Kainan Wu and Haide Wang and Jinyang Yang and Weiping Liu and Junwen Zhang and Changyuan Yu and Xiangjun Xin and Liangchuan Li},
journal= {arXiv preprint arXiv:2503.02252},
year = {2025}
}
Comments
This manuscript has been submitted to Journal of Optical Communications and Networking