摘要
匹配干涉场被动定位方法具有较好的宽容性,对声场参数建模误差要求较低,但当声场失配程度较高,或目标信号信噪比较低时,基于干涉场结构匹配的相关峰值不明显,使得匹配性能降低。因此,在原始的匹配干涉场的基础上提出了一种基于Radon变换的改进方法,利用Radon变换对拷贝声场的干涉结构和实际声场的精细干涉结构进行图像处理后再对其作相关处理。仿真和实验数据表明,经此改进后,即使是在建模声场存在一定失配的条件下,在匹配相关峰值提高的同时,旁瓣也能得到有效抑制,能够有效地改进匹配干涉场的被动定位效果。
The original matching interference field method for passive localization has a good tolerance for sound field modeling errors.However,in case of serious sound field mismatch,or low signal-to-noise ratio target,the correlation peak based on interference field structure matching is not obvious,which makes the matching effect decreased Therefore,based on the original matching interference field,an improved method is proposed by using Radon transform to perform the image processing of the fine interference structures of the actual and calculated interference sound fields and the subsequent correlation processing.Simulation and experimental data show that after this improvement,even in case of some sound field mismatch,the matching correlation peak value is increased and the side lobes are effectively suppressed,thus the passive localization effect of the matching interference field can be effectively improved.
作者
肖海瀚
高源
周胜增
XIAO Hai-han;GAO Yuan;ZHOU Sheng-zeng(Shanghai Marine Electronic Equipment Research Institute,Shanghai 201108,China;Science and Technology on Underwater Acoustic Antagonizing Laboratory,Shanghai 201108,China)
出处
《舰船科学技术》
北大核心
2023年第6期140-145,共6页
Ship Science and Technology
关键词
匹配干涉场
RADON变换
图像处理
被动定位
matching interference field
radon transform
image processing
passive localization
