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用于水下声学正交频分复用通信的实时自适应调制方案

Real-Time Adaptive Modulation Schemes for Underwater Acoustic OFDM Communication.

作者信息

Barua Suchi, Rong Yue, Nordholm Sven, Chen Peng

机构信息

School of Electrical Engineering, Computing and Mathematical Sciences (EECMS), Faculty of Science and Engineering, Curtin University, Bentley, WA 6102, Australia.

出版信息

Sensors (Basel). 2022 Apr 30;22(9):3436. doi: 10.3390/s22093436.

DOI:10.3390/s22093436
PMID:35591126
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9104906/
Abstract

Adaptive modulation received significant attention for underwater acoustic (UA) communication systems with the aim of increasing the system efficiency. It is challenging to attain a high data rate in UA communication, as UA channels vary fast, along with the environmental factors. For a time-varying UA channel, a self-adaptive system is an attractive option, which can choose the best method according to the channel condition to guarantee the continuous connectivity and high performance constantly. A real-time orthogonal frequency-division multiplexing (OFDM)-based adaptive UA communication system is presented in this paper, employing the National Instruments (NI) LabVIEW software and NI CompactDAQ device. In this paper, the received SNR is considered as a performance metric to select the transmission parameters, which are sent back to the transmitter for data transmission. In this research, a UA OFDM communication system is developed, employing adaptive modulation schemes for a nonstationary UA environment which allows to select subcarriers, modulation size, and allocate power adaptively to enhance the reliability of communication, guarantee continuous connectivity, and boost data rate. The recent UA communication experiments carried out in the Canning River, Western Australia, verify the performance of the proposed adaptive UA OFDM system, and the experimental results confirm the superiority of the proposed adaptive scheme.

摘要

自适应调制因旨在提高系统效率而在水下声学（UA）通信系统中受到了广泛关注。在UA通信中实现高数据速率具有挑战性，因为UA信道会随着环境因素快速变化。对于时变UA信道，自适应系统是一个有吸引力的选择，它可以根据信道条件选择最佳方法，以持续保证连接性和高性能。本文提出了一种基于实时正交频分复用（OFDM）的自适应UA通信系统，采用了美国国家仪器公司（NI）的LabVIEW软件和NI CompactDAQ设备。在本文中，接收信噪比被视为选择传输参数的性能指标，这些参数会被反馈回发射机进行数据传输。在这项研究中，开发了一种UA OFDM通信系统，该系统针对非平稳UA环境采用自适应调制方案，能够自适应地选择子载波、调制大小并分配功率，以提高通信可靠性、保证持续连接性并提高数据速率。最近在澳大利亚西部坎宁河进行的UA通信实验验证了所提出的自适应UA OFDM系统的性能，实验结果证实了所提自适应方案的优越性。

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本文引用的文献

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Impact of ocean variability on coherent underwater acoustic communications during the Kauai [corrected] experiment (KauaiEx).考艾岛实验（KauaiEx）期间海洋变化对相干水下声学通信的影响。 [已修正]
J Acoust Soc Am. 2008 Feb;123(2):856-65. doi: 10.1121/1.2828055.
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A high-frequency warm shallow water acoustic communications channel model and measurements.一种高频温暖浅水声学通信信道模型与测量
J Acoust Soc Am. 2007 Nov;122(5):2580-6. doi: 10.1121/1.2782884.
无线通信与网络的高级主题及智能系统
Sensors (Basel). 2023 Aug 3;23(15):6876. doi: 10.3390/s23156876.