Low-Complexity Digital Equalizers for High-Speed Underwater Optical Wireless Communication

LI Chao; HU Zhijia

doi:10.1049/cje.2021.08.012

Volume 30 Issue 6

Nov. 2021

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Article Navigation > Chinese Journal of Electronics > 2021 > 30(6): 1167-1172

LI Chao and HU Zhijia, “Low-Complexity Digital Equalizers for High-Speed Underwater Optical Wireless Communication,” Chinese Journal of Electronics, vol. 30, no. 6, pp. 1167-1172, 2021, doi: 10.1049/cje.2021.08.012

Citation:

LI Chao and HU Zhijia, “Low-Complexity Digital Equalizers for High-Speed Underwater Optical Wireless Communication,” Chinese Journal of Electronics, vol. 30, no. 6, pp. 1167-1172, 2021, doi: 10.1049/cje.2021.08.012

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Low-Complexity Digital Equalizers for High-Speed Underwater Optical Wireless Communication

doi: 10.1049/cje.2021.08.012

LI Chao^{1
,
,},
HU Zhijia²

1. Information Materials and Intelligent Sensing Laboratory of Anhui Province, Institutes of Physical Science and Information Technology, Anhui University, Hefei 230601, China;
2. Information Materials and Intelligent Sensing Laboratory of Anhui Province, School of Physics and Materials Science, Anhui University, Hefei 230601, China

Funds:

This work is supported by the Anhui Provincial Natural Science Foundation of China (No.1808085MF186).

Received Date: 2020-12-16
Rev Recd Date: 2021-04-04

Available Online: 2021-09-23

Publish Date: 2021-11-05

Abstract

Abstract

Hundreds of Megabit per second (Mb/s) data transmission over a moderate range (10m) underwater optical wireless channel is implemented with 4-level pulse amplitude modulation scheme using an off-the-shelf light-emitting diode as the optical source and digital equalizers. In particular, the channel nonlinear distortion from light-emitting diode is considered and a matched model is developed. To mitigate these distortions under various 4-level pulse amplitude modulation signal baud rates, the Bit error rate (BER) and Signal-to-noise ratio (SNR) performances of the pre-, post- and matchedequalizers are evaluated and compared. The digital matched-equalizer bank is shown and verified to offer the best BER/SNR performance for 4-level pulse amplitude modulation signal using more than 200 MBaud rate. With the proposed equalizer, we have recorded the highest data rate of 600Mb/s at 20% FEC limit over 10m free-space underwater link.
- Underwater optical wireless communication,
- Light-emitting diode,
- Inter-symbol interference,
- Digital equalizer

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References(22)

References

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