基于远近场声传播特性的拖线阵声纳平台辐射噪声空域矩阵滤波技术  

Towed Line Array Sonar Platform Radiated Noise Spatial Matrix Filter Based on Far-Field and Near-Field Sound Propagation Characteristics

作　　者：韩东[1,2] 张海勇[2] 黄海宁[1] 李启虎[1] 

机构地区：[1]中国科学院声学研究所,北京100190 [2]海军大连舰艇学院通信系,辽宁大连116018

出　　处：《电子学报》2014年第3期432-438,共7页Acta Electronica Sinica

基　　金：国家自然科学基金(No.60532040;No.11374001);海军大连航艇学院科研发展基金(No.2009032)

摘　　要：针对拖线阵声纳平台噪声构成近场强干扰影响声纳弱目标探测的问题,利用近场平台噪声的多途传播特性及远场目标信号的平面波传播特性,将匹配场定位技术和平面波目标方位估计技术结合,利用平台噪声到达接收阵的拷贝向量以及平面波方向向量共同设计具有强干扰抑制功能的空域矩阵滤波器,实现了近场平台噪声抑制.设计两种最优化问题,获得不同的噪声抑制效果,给出它们的最优解,验证了解的正确性,找出解之间的关联.解释了平台辐射噪声在阵列端首方位附近构成强干扰的原因,同时解释了空域矩阵滤波后存在探测盲区的原因.由仿真可知,空域矩阵滤波处理可获得更小的探测盲区,同时获得盲区外更高的探测能力.The detection of far-field weak target is influenced by the strong near-field platform radiated noise interference in the towed line array sonar. The near-field sound is with multiple channel propagation, and the far-field sound is with plane wave propagation.By these propagation characteristics, the matched field processing technology and the direction of arrival estimation technology are combined together. The spatial malrix filters are designed by the near-filed platform noise copy vector and the far- field plane wave bearing vector. Two optimization programs are built to achieve different platform noise suppression effects. The op- timal solutions are deduced directly and their relationships are established. In the bearing course, the strong interferences exist without filtering, and the blind areas exist after filtering by the spatial maa＇ix filter. The reason is that there are relativities between the plat- form copy vector and the plane wave bearing vector. Simulations indicate that it can achieve less blind area and higher detection ca- pability with spatial matrix filter processing.

关 键 词：平台辐射噪声 空域矩阵滤波 矩阵滤波器 匹配场处理 波束形成 干扰抑制 噪声抵消 拖线阵声纳 

分 类 号：TP911.9[自动化与计算机技术]