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.

从仿生学的角度实现隐蔽的水下声通信引起了越来越多的研究兴趣。受到跳频频谱图模式的启发，提出了一种以鲸类口哨作为通信载体的仿生水下声通信方法。基本思想是生成具有不同频谱图的合成口哨以传输信息。在从受噪声污染的录音中提取哨声轮廓后，首先对哨声建模。然后，产生具有特殊频谱图模式的合成哨声，该哨声图模仿哨声谱特征，以调制信息。仿生通信帧是原始哨声和合成哨声的组合，分别用于同步和信息调制。同步之后，提取每个接收到的符号并将其与本地生成的信号相关。信息解调是通过相关峰判定来进行的。最后通过时频相关系数和梅尔频率倒谱系数分析了通信信号的仿生效应。仿真和海试验证了该方法的可行性。少于$\mathrm{1个}{0}^{-3}$ 在海试中，在距离8.5 km处相关系数超过0.9时，实现了未编码的误码率。