摘要
浅海波导中目标辐射噪声LOFAR谱图存在明暗相间的干涉条纹,从中可以提取出目标距离特征量信息,它反映了目标运动过程中的距离变化率。低信噪比情况下,条纹特征不够清晰,提取的距离特征量值精度会降低。提出了对LOFAR谱图进行图像处理,使条纹特征更加明显。海试数据处理结果表明,去噪处理后提取出的距离特征量精度明显提高。
Striations have appeared in plots of Low Frequency Analysis Recording（LOFAR）spectrum in acoustic environment of the shallow water.The distance change ratio of target can be described by distance characteristic feature.It can be extracted from LOFAR spectrum striations.Low precision of distance characteristic feature has been obtained because of the low signal to noise ratio and striation pollution.In order to make the striations more clearly,an image denoising method has been put forward.The ocean experimental results show that the precision of distance characteristic feature is one times higher after LOFAR spectrum image processing.
出处
《舰船电子工程》
2015年第10期48-50,181,共4页
Ship Electronic Engineering
关键词
距离特征量
LOFAR谱
图像去噪
distance characteristic feature
LOFAR spectrum
image denoising
