水下声源匹配场定位强相关水面噪声抑制方法

对水下声源目标进行匹配场定位时,当存在强水面干扰声源,采用线性匹配场处理器和对角加载的最小方差无畸变响应匹配场处理器均无法正确定位水下目标声源,文章在对加权向量的讨论基础上,提出了最优加权向量,通过限制对干扰声源的响应,同时保持对目标声源的响应不变,求解该最优加权向量,并通过数据仿真验证了水面声源与水下声源强相关且声源级之比为10dB时,仍能准确定位水下弱声源目标。

When locating underwater sound source by using matched field processing,conventional matched field processing and diagonal loading minimum variance distortionless response can not locate underwater sound source correctly when there is strong surface interference.Based on the discussion of weighted vector,this paper proposes the optimal weighted vector,which can limit the response to the interference source and keep the response to the sound target stable at the same time.The optimal weighted vector is obtained,and it is verified by data simulation that the underwater weak sound source can be accurately located when the surface sound source is strongly correlated with the underwater sound source and the ratio of sound source level is 10dB.