Design and Evaluation of High-Sensitivity Underwater Optical Communication Transceiver Based on Digital Signal Processing

Tingrui Ren; Xiaonan Yu; Shoufeng Tong; Mingguang Tian; Tong Wang; Peng Zhang; Dashuai Wang; Ning An

doi:10.3788/CJL202249.0406005

Chinese Journal of Lasers, Volume. 49, Issue 4, 0406005(2022)

Design and Evaluation of High-Sensitivity Underwater Optical Communication Transceiver Based on Digital Signal Processing

Tingrui Ren^1,2, Xiaonan Yu², Shoufeng Tong^2、*, Mingguang Tian², Tong Wang², Peng Zhang², Dashuai Wang², and Ning An³

Author Affiliations

¹School of Optoelectronic Engineering, Changchun University of Science and Technology, Changchun, Jilin 130022, China

²National and Local Engineering Research Center of Space Optoelectronic Technology, Changchun University of Science and Technology, Changchun, Jilin 130022, China

³Changchun Observatory, National Astronomical Observatories, Chinese Academy of Sciences, Changchun, Jilin 130117, China

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Figures & Tables(12)

Fig. 1. Relationship between SNR and slot error rate of OOK modulation under different water quality conditions

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Fig. 2. Architecture of underwater digital receiving terminal

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Fig. 3. Frequency response curve of FIR filter

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Fig. 4. Adaptive threshold simulation of demodulation baseband waveform

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Fig. 5. Schematic diagram of moving average filter

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Fig. 6. Simulation of moving average filter module

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Fig. 7. General block diagram of underwater communication experiment

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Fig. 8. Experiment of underwater communication system in indoor pool. (a) Receiver; (b) transmitter; (c) indoor pool channel

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Fig. 9. Experiment of underwater communication system in real water environment. (a) Qiandao lake water channel; (b) outdoor pool channel

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Fig. 10. Test results of communication distance in water channel

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Table 1. Parameters of different water quality conditions

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Table 1. Parameters of different water quality conditions

Water type	Absorption coefficient a /m^－1	Scattering coefficient b /m^－1	Attenuation coefficient c /m^－1
Clear ocean	0.0405	0.0025	0.043
Coastal ocean	0.114	0.037	0.151
Harbor water	0.179	0.220	0.339
Turbid port	0.366	1.829	2.195

Table 2. Experimental results under different water quality environments
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Table 2. Experimental results under different water quality environments
Distance /m Attenuation coefficient /m^－1 Total link loss /dB Error rate Detection sensitivity /dBm
4.5 1.33 56.63 10^－6 －37.52
5 1.30 57.57 10^－5 －38.46
10 0.47 57.11 10^－6 －38.00
20 0.17 57.39 10^－6 －38.28

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Tingrui Ren, Xiaonan Yu, Shoufeng Tong, Mingguang Tian, Tong Wang, Peng Zhang, Dashuai Wang, Ning An. Design and Evaluation of High-Sensitivity Underwater Optical Communication Transceiver Based on Digital Signal Processing[J]. Chinese Journal of Lasers, 2022, 49(4): 0406005

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