现场可编程门阵列
失真(音乐)
计算机科学
千兆位
传输(电信)
信号(编程语言)
电子工程
数据传输
数字信号处理
计算机硬件
电信
工程类
带宽(计算)
放大器
程序设计语言
作者
Sheng Hu,Tianqi Zheng,Chengzhen Bian,Xiongwei Yang,Xinda Sun,Zonghui Zhu,Yumeng Gou,Yuanxiao Meng,Jie Zhang,Jingtao Ge,Yichen Li,Kaihui Wang
出处
期刊:Sensors
[MDPI AG]
日期:2024-12-09
卷期号:24 (23): 7872-7872
摘要
In this work, we implemented a short-reach real-time optical communication system using MLP for pre-distortion. Lookup table (LUT) algorithms are commonly employed for pre-distortion in intensity modulation and direct detection (IM/DD) systems. However, storage limitations typically restrict the LUT pattern length to 9, limiting its effectiveness in compensating for nonlinear effects. A multilayer perceptron (MLP) can overcome this limitation by predicting errors and generating pre-distorted signals, thus replacing the extensive storage requirements of LUTs with minimal computational resources. The MLP-based digital pre-distortion (MLP-DPD) technique enables the creation of long-pattern LUTs for improved nonlinear compensation. In this work, an MLP-DPD scheme was implemented on a field-programmable gate array (FPGA). The FPGA was used to generate a 14.7456 GBaud pre-distorted pulse amplitude modulation 4-level (PAM4) signal. This signal was then transmitted over 20 km of standard single-mode fiber (SSMF). At the receiver, the parallel constant modulus algorithm (PCMA) was applied for signal processing. The bit error rate (BER) achieved met the 2.4 × 10
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