Real-time burst-mode digital signal processing for passive optical networks

IF 4.3 2区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE

Journal of Optical Communications and Networking Pub Date : 2025-09-16 DOI:10.1364/JOCN.560191

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 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. This paper demonstrates a real-time BM-DSP for burst reception of a 25 Gbit/s on-off keying signal to meet the asymmetric-mode 50G PON demand. The real-time BM-DSP includes BM frequency-domain timing recovery and a BM frequency-domain equalizer, which can be fast converged based on the ${\sim}42\;\text{ns}$ 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% compared to the conventional implementation without optimization, enabling the loading of real-time BM-DSP in a field programmable gate array with 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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无源光网络的实时突发模式数字信号处理

在容量需求不断增长的推动下，50G无源光网络（PON）逐渐走向成熟。50G PON面临的主要挑战之一是对突发上行信号进行突发模式数字信号处理（BM-DSP）。为了满足50G非对称模式PON的需求，本文设计了一种实时的BM-DSP，用于突发接收25gbit /s的开关键控信号。实时BM- dsp包括BM频域定时恢复和BM频域均衡器，它们可以基于${\sim}42\；\text{ns}$设计的序言。同时，快速傅立叶变换、最小均方误差和决策导向最小均方误差算法的简化实现与未经优化的传统实现相比，减少了28.57%的DSP资源，使实时BM-DSP能够在DSP资源有限的现场可编程门阵列中加载。BM-DSP的实时实现可以指导50G PON专用集成电路的设计。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Optical Communications and Networking 工程技术-电信学

CiteScore

9.40

自引率

16.00%

发文量

104

审稿时长

4 months

期刊介绍： The scope of the Journal includes advances in the state-of-the-art of optical networking science, technology, and engineering. Both theoretical contributions (including new techniques, concepts, analyses, and economic studies) and practical contributions (including optical networking experiments, prototypes, and new applications) are encouraged. Subareas of interest include the architecture and design of optical networks, optical network survivability and security, software-defined optical networking, elastic optical networks, data and control plane advances, network management related innovation, and optical access networks. Enabling technologies and their applications are suitable topics only if the results are shown to directly impact optical networking beyond simple point-to-point networks.