摘要
利用目标辐射噪声的调制信息可以实现对目标的高方位分辨。为了能够准确获取目标调制谱特征,提出了一种基于小波变换和多分辨率分析理论的辐射噪声调制信息提取方法。首先提取水下目标辐射噪声的调制包络信息,之后对动态调制包络进行112维谱分析,从而得到辐射噪声的谐波信息。最后对实测噪声数据进行了仿真研究,结果表明,该方法可以有效提取噪声中动态调制信息。
It can be achieved on target of high azimuth resolution using the modulated information of target radiated noise. In order to obtain the accurate features of target modulated spectrum, this paper put forward a method for extracting modulated information of the radiated noise based on wavelet transform and multi resolution analysis theory. Firstly the modulated envelops of the radiated noise were extracted. Secondly dynamic modulated envelops were analyzed by 3/2 dimensional spectrum and harmonic information was achieved. Finally the real measured date from radiated noise was simulated. The result indicates that dynamic modulated signals can be extracted by the method.
出处
《舰船电子工程》
2012年第9期147-149,155,共4页
Ship Electronic Engineering
关键词
辐射噪声
调制信息
小波变换
仿真
radiated noise
modulated information
wavelet transform
simulation
