Telecommunications Science ›› 2023, Vol. 39 ›› Issue (5): 11-19.doi: 10.11959/j.issn.1000-0801.2023107

• Topic: Visible Light Communication • Previous Articles     Next Articles

Application of BO-BiGRU based post equalizer in high-speed underwater visible light communication system

Haoyu ZHANG, Li YAO, Chaoxu CHEN, Jianyang SHI, Chao SHEN, Nan CHI   

  1. Key Laboratory for Information Science of Electromagnetic Waves, Ministry of Education, Fudan University, Shanghai 200438, China
  • Revised:2023-05-08 Online:2023-05-20 Published:2023-05-01
  • Supported by:
    The National Key Research and Development Program of China(2022YFB2802803);The National Natural Science Foundation of China(61925104);The National Natural Science Foundation of China(62031011);The National Natural Science Foundation of China(62201157)

Abstract:

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 3.8×10-37% forward error correction (FEC), which is 128 Mbit/s higher than the traditional post equalization method.

Key words: underwater visible light communication, nonlinear effect, waveform level post equalizer, Bayesian optimization, bidirectional gated recurrent unit

CLC Number: 

No Suggested Reading articles found!