一种水声通信信号调制模式识别方法

One Method of Standard Recognition of Underwater Acoustic Signal

研究了制式识别的特征参数提取方法,以小波变换为主,结合瞬时频率统计算法、高阶谱等多种识别算法,对现有水下通信信号调制方式进行类间、类内识别,包括多载波(OFDM)和单载波(MFSK、MPSK和QAM)。仿真结果表明,文章所采用的方法在低信噪比下的识别概率均能保持在82%以上,具有较好的识别性能。

This article did a research on themethod of characteristic parameter obtainment. Based on Wavelet Transform, instantaneous parameter extraction and higher-order cumulants are used to recognize the Underwater Sound Signal, including Single carrier（MFSK,MPSK, QAM） and multicarrier（OFDM）. Simulation results show that the rate of modulation identification is able to keep 82% above in the situation of low SNR, meaning that the proposed method has a good ability of identification.