A rotated QAM based DMT scheme for underwater optical wireless communication system

Jing He; Jing He

doi:10.1117/12.2616465

26 July 2022 A rotated QAM based DMT scheme for underwater optical wireless communication system

Jing He, Jing He

Proceedings Volume 12278, 2021 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing; 122780A (2022) https://doi.org/10.1117/12.2616465
Event: 2021 International Conference on Optical Instruments and Technology, 2022, Online Only

Abstract

In the paper, a rotated quadrature amplitude modulation (QAM) based discrete multi-tone (DMT) is proposed and experimentally demonstrated in underwater optical wireless communication (UOWC). After transmission over 2.4-m water channel and 10-m free space, the experimental results show that, compared with conventional 16-QAM DMT, the received optical power (ROP) is improved 3.3dB at the bit error rate (BER) of 10^-5 using the rotated QAM based DMT. In addition, for the rotated 32-QAM DMT, the receiver sensitivity can enhance 3.5dB compared with conventional 32 QAM DMT. And compared to DMT with bit loading, it is improved 1dB at the BER of 10^-3.

Citation Download Citation

Jing He and Jing He "A rotated QAM based DMT scheme for underwater optical wireless communication system", Proc. SPIE 12278, 2021 International Conference on Optical Instruments and Technology: Optical Communication and Optical Signal Processing, 122780A (26 July 2022); https://doi.org/10.1117/12.2616465

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KEYWORDS

Quadrature amplitude modulation

Digital signal processing

Modulation

Receivers

Ocean optics

Signal attenuation

Wireless communications

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