水中目标辐射噪声调制信息提取方法研究

Study on underwater target radiated noise modulated information extraction method

讨论了应用小波分析从辐射噪声中提取调制信息的方法。首先利用多尺度分析方法将噪声信号在不同层次的空间上进行分解,实现调制信号与辐射噪声的分离;然后,利用小波变换提取其包络,求取功率谱得到调制信息.在此基础上,对实测辐射噪声数据进行仿真研究.结果表明,该方法用于噪声中调制信息检测是一种有效的手段.

This paper deals with the modulated information extraction based on the wavelet transform. First, the modulated information is separated from radiated noise by means of multi-resolution analysis. Second, the separated modulated information envelopment is extracted and the power spectrum is estimated by using the continuous wavelet transform. On the basis of the above research, the real data of radiated noise is simulated. The result indicates that the method is an effective way to extract the modulated information from radiated noise.