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首页> 外文会议>OCEANS 2016 MTS/IEEE Monterey >An underwater acoustic 64QAM OFDM communication system with robust Doppler compensation
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An underwater acoustic 64QAM OFDM communication system with robust Doppler compensation

机译：具有鲁棒多普勒补偿的水下声学64QAM OFDM通信系统

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摘要

This paper proposes an underwater acoustic OFDM communication system to transmit image or movie data from deep see AUV etc. to surface ship. In order to mitigate Doppler shift effect caused by transmitter and/or receiver movement, the OFDM receiver possesses additional time domain signal processing such as signal shrink-expansion processing and Doppler shift compensation capabilities. The outputs of the four OFDM receivers are further combined by frequency domain diversity combiner with Maximum-Ratio Combining (MRC) algorithm to improve Signal to Noise ratio. The proposed communication system is verified by Ocean measurement at Shizuoka prefecture in Japan. Our system utilized 20-28[KHz] ultrasonic OFDM channel and subcarrier spacing of 100[Hz]. Total number of sub-carriers is 81. QPSK / 16QAM / 64QAM modulations are used. By performing experiment in the ocean at depth of 1000m, BER of approximately less than 1E-2 has been successfully obtained using 64QAM without any error correction.
机译：本文提出了一种水下声学OFDM通信系统，用于将图像或电影数据从Deep See AUV等传输到地面船。为了减轻由发射机和/或接收器移动引起的多普勒换档效果，OFDM接收器具有额外的时域信号处理，例如信号收缩 - 扩展处理和多普勒频移补偿能力。四种OFDM接收器的输出通过频域分集组合器具有最大比率组合（MRC）算法来提高信噪比。拟议的通信系统由日本静冈县的海洋测量核实。我们的系统利用20-28 kHz超声波频道和100 [Hz]的子载波间距。子载波总数为81.使用QPSK / 16QAM / 64QAM调制。通过在1000米的深度下进行海洋进行实验，使用64QAM已经成功获得了大约小于1E-2的BER，而没有任何纠错。

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