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A frequency hopping pattern inspired bionic underwater acoustic communication

机译：跳频模式启发了仿生水下声学通信

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摘要

The covert underwater acoustic communication realized from the perspective of bionics draws an increasing interest in recent researches. Inspired by the frequency hopping spectrogram pattern, a bionic underwater acoustic communication method is proposed by using cetacean whistle as communication carrier. The basic idea is to generate synthetic whistle with different spectrogram to transmit the information. The whistle is first modeled after extracting the whistle contour from the noise-polluted recordings. Then a synthetic whistle with a special spectrogram pattern which mimics the whistle spectral characteristic is generated to modulate the information. The bionic communication frame is the combination of the original whistle and the synthetic whistles which are used for synchronization and information modulation respectively. After synchronization, the each received symbol is extracted and correlated with the locally generated signals. The information demodulation is conducted by the correlation peak decision. Finally the bionic effect of communication signals is analyzed through time-frequency correlation coefficient and Mel frequency cepstrum coefficient. Simulation and sea trial verified the feasibility of the proposed method. Less than 10(-3) uncoded bit error rate is achieved with the correlation coefficient over 0.9 at a distance of 8.5km in the sea trial. (C) 2021 Elsevier B.V. All rights reserved.
机译：从仿生学角度实现的隐蔽水下声学通信在最近的研究中实现了越来越兴趣的兴趣。灵感来自跳频谱图模式，通过使用鲸类哨子作为通信载体提出了一种仿生水下声学通信方法。基本思想是生成具有不同频谱图的合成啸叫，以传输信息。在从噪声污染记录中提取哨子轮廓之后，首先建模哨子。然后，生成具有特殊谱图模式的合成哨，产生模拟哨子光谱特性以调制信息。仿生通信框架是原始哨子和合成口哨的组合，用于分别用于同步和信息调制。在同步之后，提取每个接收的符号并与本地生成的信号相关联。信息解调是由相关峰决策进行的。最后通过时间频率相关系数和MEL频率综合系数分析通信信号的仿生效应。仿真和海上试验验证了该方法的可行性。在海岛试验中，在距离8.5km的距离下的相关系数超过0.9的相关系数达到小于10（-3）未编码的误码率。 （c）2021 elestvier b.v.保留所有权利。

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