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
Subject
Atomic and Molecular Physics, and Optics
Cited by
7 articles.
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