Gaussian basis expansion-based phase noise suppression for polarization division multiplexing coherent optical UFMC system

IF 2.6 3区 计算机科学 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC
Xi Fang, Song Zhang, He Zhou, Ling yu Liu, Ding Ding
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引用次数: 0

Abstract

As a form of multi-carrier modulation, universal filter multicarrier (UFMC) combined with optical communication systems provides significant advantages for long-distance transmission, including large bandwidth, low attenuation, and flexible spectrum resource allocation. While polarization division multiplexing (PDM) enhances system capacity, it concurrently introduces various interference leading to signal distortion. Notably, phase noise has a profound impact on the performance of multi-carrier modulation systems. Phase noise results in stochastic variations to the signal, making the recovery of receiver signals challenging. In this paper, we propose a phase noise suppression method based on Gaussian Basis Expansion (GBE), specifically designed for PDM coherent optical universal filter multicarrier (CO-UFMC) system. We analyze the fundamental principles of phase noise suppression using GBE and validate its effectiveness in optical UFMC transmission systems. In comparison to traditional phase noise suppression methods, our approach exhibits superior phase noise robustness, while maintaining comparable computational complexity. The GBE method significantly enhances the system’s tolerance to laser phase noise and improves its robustness against phase noise. The theoretical analysis is corroborated through numerical simulations of a 16-quadrature amplitude modulation (QAM) optical UFMC system.

基于高斯基扩展的偏振分复用相干光 UFMC 系统相位噪声抑制技术
作为一种多载波调制方式,通用滤波器多载波(UFMC)与光通信系统相结合,为长距离传输提供了显著优势,包括大带宽、低衰减和灵活的频谱资源分配。偏振分复用(PDM)在提高系统容量的同时,也会引入各种干扰,导致信号失真。值得注意的是,相位噪声对多载波调制系统的性能有着深远的影响。相位噪声会导致信号的随机变化,使接收器信号的恢复面临挑战。本文提出了一种基于高斯基扩展(GBE)的相位噪声抑制方法,专门用于 PDM 相干光通用滤波器多载波(CO-UFMC)系统。我们分析了使用 GBE 抑制相位噪声的基本原理,并验证了它在光学 UFMC 传输系统中的有效性。与传统的相位噪声抑制方法相比,我们的方法在保持可比计算复杂度的同时,表现出了卓越的相位噪声鲁棒性。GBE 方法大大增强了系统对激光相位噪声的耐受性,提高了系统对相位噪声的鲁棒性。通过对 16 正交振幅调制(QAM)光学 UFMC 系统进行数值模拟,理论分析得到了证实。
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来源期刊
Optical Fiber Technology
Optical Fiber Technology 工程技术-电信学
CiteScore
4.80
自引率
11.10%
发文量
327
审稿时长
63 days
期刊介绍: Innovations in optical fiber technology are revolutionizing world communications. Newly developed fiber amplifiers allow for direct transmission of high-speed signals over transcontinental distances without the need for electronic regeneration. Optical fibers find new applications in data processing. The impact of fiber materials, devices, and systems on communications in the coming decades will create an abundance of primary literature and the need for up-to-date reviews. Optical Fiber Technology: Materials, Devices, and Systems is a new cutting-edge journal designed to fill a need in this rapidly evolving field for speedy publication of regular length papers. Both theoretical and experimental papers on fiber materials, devices, and system performance evaluation and measurements are eligible, with emphasis on practical applications.
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