Full-Duplex Analog Photonic Fronthaul Link With Carrier Reuse at 25 GHz for 5G and beyond

IF 2.5 3区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Photonics Technology Letters Pub Date : 2025-07-18 DOI:10.1109/LPT.2025.3590478

J. Mora;J. Bohata;J. Vocilka;B. Ortega;S. Zvánovec

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引用次数: 0

Abstract

This letter proposes a full-duplex analog fronthaul seamless transmission system employing wavelength reuse for simultaneous downlink (DL) and uplink (UL) signal data streaming at 25 GHz frequency band. The proposed architecture integrates centralized optical sources at a central office (CO), an optical distribution network (ODN) comprising 10 km of standard single-mode fiber (SSMF) and a 1.9 m long free-space optical (FSO) link, and a remote radio head (RRH) utilizing 1.9 m long wireless radio links. Intensity modulation is used for DL, while phase modulation combined with optical filtering enables efficient carrier reuse and data modulation for UL. The system’s performance is assessed using orthogonal frequency-division multiplexing (OFDM) signals with 64-quadrature amplitude modulation (QAM) and quadrature phase shift keying (QPSK) modulation for DL and UL. Results demonstrate low error vector magnitude (EVM) across various input and received optical power levels, with minimal penalties from fiber dispersion and bidirectional reflections. The study also evaluates the impact of nonlinearities, phase noise, and intermodulation distortions, showcasing the system’s robustness. This scalable, efficient solution advances full-duplex optical fronthaul networks and supports millimeter-wave (mmW) applications beyond 25 GHz.

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25 GHz载波复用的全双工模拟光子前传链路，用于5G及以后

这封信提出了一种采用波长复用的全双工模拟前传无缝传输系统，用于同时在25 GHz频段进行下行链路（DL）和上行链路（UL）信号数据流。提出的架构集成了中央办公室（CO）的集中式光源，一个由10公里标准单模光纤（SSMF）和1.9米长的自由空间光（FSO）链路组成的光分配网络（ODN），以及一个利用1.9米长的无线无线电链路的远程无线电头（RRH）。DL采用强度调制，而相位调制与光滤波相结合，可实现高效的载波复用和UL的数据调制。采用正交频分复用（OFDM）信号对DL和UL进行64正交调幅（QAM）和正交相移键控（QPSK）调制，对系统性能进行了评估。结果表明，在不同的输入和接收光功率水平下，误差矢量大小（EVM）较低，光纤色散和双向反射的影响最小。该研究还评估了非线性、相位噪声和互调失真的影响，展示了系统的鲁棒性。这种可扩展、高效的解决方案推进了全双工光前传网络，并支持超过25 GHz的毫米波（mmW）应用。

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

IEEE Photonics Technology Letters 工程技术-工程：电子与电气

CiteScore

5.00

自引率

3.80%

发文量

404

审稿时长

2.0 months

期刊介绍： IEEE Photonics Technology Letters addresses all aspects of the IEEE Photonics Society Constitutional Field of Interest with emphasis on photonic/lightwave components and applications, laser physics and systems and laser/electro-optics technology. Examples of subject areas for the above areas of concentration are integrated optic and optoelectronic devices, high-power laser arrays (e.g. diode, CO2), free electron lasers, solid, state lasers, laser materials'' interactions and femtosecond laser techniques. The letters journal publishes engineering, applied physics and physics oriented papers. Emphasis is on rapid publication of timely manuscripts. A goal is to provide a focal point of quality engineering-oriented papers in the electro-optics field not found in other rapid-publication journals.