CAJ | 학술논문

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。
침대타선진성납평태조성구성근장강간우영향성납약목표탐측적문제，이용근장평태조성적다도전파특성급원장목표신호적평면파전파특성，장필배장정위기술화평면파목표방위고계기술결합，이용평태조성도체접수진적고패향량이급평면파방향향량공동설계구유강간우억제공능적공역구진려파기，실현료근장평태조성억제。설계량충최우화문제，획득불동적조성억제효과，급출타문적최우해，험증료해적정학성，조출해지간적관련。해석료평태복사조성재진렬단수방위부근구성강간우적원인，동시해석료공역구진려파후존재탐측맹구적원인。유방진가지，공역구진려파처리가획득경소적탐측맹구，동시획득맹구외경고적탐측능력。
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 matrix 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 matrix 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 .