Anti error and erasure coding for water-to-air visible light communication through wavy water surface with wave height up to 0.6 meters

Author:

Fu Chunfang1,Lin Tianrui1,Gong Chen1ORCID,Huang Nuo1,Wei Tianjian1,Liu Xinhui2,Tang Li2,Su Liang2,Luo Jianghua34,Xu Zhengyuan1ORCID

Affiliation:

1. University of Science and Technology of China

2. China Ship Scientific Research Center

3. Yangtze University

4. Zhongshan Zhongchuang Technology Research Institute of Opto-electronics Industry

Abstract

Considering large dynamic optical intensity range in a water-to-air (W2A) channel, we propose two promising channel coding schemes, namely the concatenated Reed Solomon-Low Density Parity Check (RS-LDPC) code and Raptor code, for W2A visible light communication (VLC). We establish a W2A-VLC link to verify the performance under different wavy water environments and different water depths with a green light emitting diode (LED). A wave generator is adopted to emulate the wavy water surface with wave height up to 0.6 m. The receiver is fixed 3.2 m above the water, and the transmitter varies from 2.5 m to 4.0 m under the water through a up-down-moveable platform. We test the coding schemes with different code lengths and code rates under 5 MSym/s air-interface symbol rate. Experimental results show that both schemes can reduce the bit error ratio (BER) and frame error rate (FER) of a W2A-VLC system, and thus can improve the reliability. Via comparing the two codes with the same overhead and approximately the same code length, it is demonstrated that Raptor code can generally outperform the concatenated RS-LDPC code. Our research provides promising channel coding methods without feedback for a W2A-VLC system.

Funder

National Key Research and Development Program of 354 China

National Natural Science Foundation of China

Key Program of National Natural Science Foundation of China

Key Research Program of Frontier Sciences of CAS

Fundamental Research Funds for the Central Universities

open research fund of National Mobile Communications Research Laboratory Southeast University

Publisher

Optica Publishing Group

Subject

Atomic and Molecular Physics, and Optics

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1. Cross-Water–Air Optical Wireless Communication Using Orthogonal Time–Frequency Space Modulation;Symmetry;2024-05-07

2. Non-Line-of-Sight Underwater Optical Wireless Communications with Wavy Surface;2023 Asia Communications and Photonics Conference/2023 International Photonics and Optoelectronics Meetings (ACP/POEM);2023-11-04

3. Performance Analysis of RS-Coded UOWC System under Gamma-Gamma Fading Channels for IoUT Applications;2023 4th IEEE Global Conference for Advancement in Technology (GCAT);2023-10-06

4. Real-Time Water Quality Monitoring Using Hybrid OCC and LoRa Communications;OCEANS 2023 - MTS/IEEE U.S. Gulf Coast;2023-09-25

5. Evolution of Short-Range Optical Wireless Communications;Journal of Lightwave Technology;2023-02-15

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