CAJ | 학술논문

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3/2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。
이용목표복사조성적조제신식가이실현대목표적고방위분변。위료능구준학획취목표조제보특정，제출료일충기우소파변환화다분변솔분석이론적복사조성조제신식제취방법。수선제취수하목표복사조성적조제포락신식，지후대동태조제포락진행3/2유보분석，종이득도복사조성적해파신식。최후대실측조성수거진행료방진연구，결과표명，해방법가이유효제취조성중동태조제신식。
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.