Analysis of underwater wireless optical communication system performance

Yi Yang; Fengtao He; Qiuping Guo; Min Wang; Jianlei Zhang; Zuoliang Duan

doi:10.1364/AO.58.009808

Applied Optics
Vol. 58,
Issue 36,
pp. 9808-9814
(2019)
•https://doi.org/10.1364/AO.58.009808

Analysis of underwater wireless optical communication system performance

Yi Yang, Fengtao He, Qiuping Guo, Min Wang, Jianlei Zhang, and Zuoliang Duan

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Yi Yang, Fengtao He, Qiuping Guo, Min Wang, Jianlei Zhang, and Zuoliang Duan, "Analysis of underwater wireless optical communication system performance," Appl. Opt. 58, 9808-9814 (2019)

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Related Topics
Table of Contents Category
- Fiber Optics, Fiber Sensors, and Optical Communications
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About this Article
History
- Original Manuscript: August 29, 2019
- Revised Manuscript: November 10, 2019
- Manuscript Accepted: November 11, 2019
- Published: December 11, 2019

Abstract

Because the underwater channel environment is complicated, it is difficult to do an actual experiment in the ocean to analyze the performance of underwater wireless optical communication (UWOC) systems. In this study, the spot-expansion characteristics and time-domain broadening characteristics of underwater wireless optical signals are simulated and analyzed by a Monte Carlo statistical method. Thus, what we believe is an improved underwater channel transmission-attenuation model and time-domain broadening model based on UWOC are proposed, so the transmission distance characteristics of the UWOC system are obtained by combining the system parameters, and the transmission-rate characteristics can be analyzed by using the Shannon-Hartley theorem. The results show that the transmission distance is linear with the receiver sensitivity, and the transmission rate decays exponentially with the transmission distance and is limited by the receiver sensitivity in the UWOC system.

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Transmitter Optical Power $80 m W$ , Receiver Sensitivity $- 30 d B m$ , $a_{t} = 5.5 m m$ , $a_{r} = 1.5 m m$ , $θ = 0.5 m r a d$
Water Quality	Model Calculation	Experimental Test
Lake water $c = 0.91 m^{- 1}$	8 m	8 m
Indoor pool $c = 0.25 m^{- 1}$	25 m	22 m

Transmitter Optical Power $80 m W$ , $a_{t} = 5.5 m m$ , $a_{r} = 1.5 m m$ , $θ = 0.5 m r a d$ , $c = 0.91 m^{- 1}$
Receiver sensitivity (dBm)	−20	−40	−60	−80
Transmission distance (m)	5.9	10.3	14.7	19.3

Serial Number	Absorption Coefficient ( $a$ , $m^{- 1}$ )	Scattering Coefficient ( $b$ , $m^{- 1}$ )	Attenuation Coefficient ( $c$ , $m^{- 1}$ )
1	0.2465	0.6688	0.9153
2	0.2561	0.8408	1.0969
3	0.2648	1.0018	1.2666
4	0.2730	1.1547	1.4277
5	0.2807	1.3015	1.5822
6	0.2880	1.4431	1.7312
7	0.2950	1.5806	1.8757

LD Transmit Power $80 m W$ , $a_{t} = 5.5 m m$ , $a_{r} = 1.5 m m$ , $θ = 0.5 m r a d$
$d$ (m)	14	15	16	17	18
B (MHz)	482	428	384	349	320
$P_{r}$ (dBm)	−54	−59	−63	−67.6	−71
S/N (dB)	−0.43	−4.47	−8.5	−12.5	−16.6
C (Mb/s)	448	189	73	27	10

LD Transmit Power $80 m W$ , $a_{t} = 5.5 m m$ , $a_{r} = 1.5 m m$ , $θ = 0.5 m r a d$
$d$ (m)	13	14	15	16	17
B (MHz)	478	424	382	347	318
$P_{r}$ (dBm)	−61	−65.7	−70.7	−76.2	−80.8
S/N (dB)	−6.6	−0.16	−16.3	−21.2	−26
C (Mb/s)	136	42	12.7	3.7	1.1

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Applied Optics