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arXiv · 2503.02252

Real-Time Burst-Mode Digital Signal Processing for Passive Optical Networks

Ji Zhou·Kainan Wu·Haide Wang·Jinyang Yang·Weiping Liu·Junwen Zhang·Changyuan Yu·Xiangjun Xin·Liangchuan Li
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Abstract

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.

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Ji Zhou, Kainan Wu, Haide Wang, Jinyang Yang, Weiping Liu, Junwen Zhang, Changyuan Yu, Xiangjun Xin, Liangchuan Li. 2025-03-04. Real-Time Burst-Mode Digital Signal Processing for Passive Optical Networks. https://arxiv.org/abs/2503.02252

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