81-GHz W-band 60-Gbps 64-QAM wireless transmission based on a dual-GRU equalizer
81-GHz W-band 60-Gbps 64-QAM wireless transmission based on a dual-GRU equalizer
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基于双 GRU 均衡器的 81 GHz W 频段 60 Gbps 64-QAM 无线传输
DOI：
10.1364/oe.448845
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发表时间：
2022-01-17
期刊：
影响因子：
3.8
通讯作者：
Yu, Jianjun
中科院分区：
文献类型：
--
作者：
Liu, Cuiwei;Wang, Chen;Yu, Jianjun
我们提出了一种基于非线性均衡器（双 GRU NLE）的双门循环单元神经网络，用于光纤无线电（ROF）通信系统。双均衡方案主要基于GRU算法，可以通过I-GRU和Q-GRU两个步骤进行训练。通过使用双 GRU 均衡器，可以在 81 GHz 的 10 公里 SMF 和 1.2 米无线链路上实现 60 Gbps 64-QAM 信号生成和传输。对于接收端的数字信号处理 (DSP)，演示了 CMMA 均衡器、Volterra 均衡器和双 GRU 均衡器之间的比较。结果表明，所提出的双 GRU NLE 显着减轻了非线性失真。双GRU均衡器在接收灵敏度方面比传统的CMMA和Volterra均衡器具有更好的BER性能。与 Volterra 均衡器相比，在 2x 10(-2) BER 下，接收器灵敏度可提高 1 dB，但代价是复杂性较高。据我们所知，这是首次提出一种新型双 GRU 均衡器，该均衡器有望促进 B5G 及其他应用的毫米波光子学的发展。 (C) 2022 Optica Publishing Group 根据 Optica 开放获取出版协议的条款
We propose a dual gated recurrent unit neural network based on nonlinear equalizer (dual-GRU NLE) for radio-over-fiber (ROF) communication systems. The dual equalization scheme is mainly based upon GRU algorithm, which can be trained via two steps including I-GRU and Q-GRU. By using the dual-GRU equalizer, 60-Gbps 64-QAM signal generation and transmission over 10-km SMF and 1.2-m wireless link at 81-GHz can be achieved. For the digital signal processing (DSP) at receiver, comparison between CMMA equalizer, Volterra equalizer, and dual-GRU equalizer are demonstrated. The results indicate that the proposed dual-GRU NLE significantly mitigates the nonlinear distortions. The dual-GRU equalizer has a better BER performance in receiver sensitivity than the traditional CMMA and Volterra equalizer. At the expense of large complexity, an improvement of receiver sensitivity can be achieved as much as 1 dB compared with Volterra equalizer at the BER of 2x 10(-2). To the best of our knowledge, this is the first time to propose a novel dual-GRU equalizer, which is promising for the development in millimeter-wave photonics for B5G applications and beyond. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement