摘要
信号在水下可见光通信(UVLC)信道传输的过程中易受到非线性效应的影响,为了提高系统通信性能,对接收的信号进行均衡是至关重要的。提出了一种基于贝叶斯优化算法的双向门控循环单元(BO-BiGRU)模型作为UVLC系统中的后均衡器,其能够自动寻找模型最优超参数,以实现模型的最佳性能。BO-BiGRU模型应用于1.2 m水下实验平台,采用64正交调幅(QAM)-无载波幅相调制(CAPM),在系统的误码率(BER)低于3.8×10^(-3)的7%前向纠错(FEC)阈值的情况下,实现了3.10 Gbit/s的数据传输速率,比传统的后均衡方法提高了128 Mbit/s。
Signals are susceptible to nonlinear effects in the process of underwater visible light communication(UVLC)channel transmission.In order to improve the communication performance of the system,it is very important to recover the received signals.A bidirectional gated recurrent unit model based on Bayesian optimization algorithm(BO-BiGRU)was proposed as post equalizer in UVLC system,which could automatically find the optimal hyperparameters.BO-BiGRU model was applied to the 1.2 m underwater experimental platform.64 quadrature amplitude modulation(QAM)-carrierless amplitude-and-phase modulation(CAPM)was adopted,and 3.10 Gbit/s rate of data transfer was achieved under the condition that the bit error ratio(BER)of the system was less than 3.8×10^(-3)7%forward error correction(FEC),which is 128 Mbit/s higher than the traditional post equalization method.
作者
张昊宇
姚力
陈超旭
施剑阳
沈超
迟楠
ZHANG Haoyu;YAO Li;CHEN Chaoxu;SHI Jianyang;SHEN Chao;CHI Nan(Key Laboratory for Information Science of Electromagnetic Waves,Ministry of Education,Fudan University,Shanghai 200438,China)
出处
《电信科学》
2023年第5期11-19,共9页
Telecommunications Science
基金
国家重点研发计划项目(No.2022YFB2802803)
国家自然科学基金资助项目(No.61925104,No.62031011,No.62201157)。
关键词
水下可见光通信
非线性效应
波形级别后均衡器
贝叶斯优化
双向门控循环单元
underwater visible light communication
nonlinear effect
waveform level post equalizer
Bayesian optimization
bidirectional gated recurrent unit
