声屏蔽技术抗拖船干扰  

Tow-vessel noise suppressing using acoustic covering

作　　者：马敬广[1,2] 余赟 滕超[4] 李峰[4] 

机构地区：[1]浙江大学数字技术及仪器研究所,杭州310027 [2]海军驻杭州地区军事代表室,杭州310012 [3]哈尔滨工程大学,哈尔滨150001 [4]杭州应用声学研究所,杭州310012

出　　处：《应用声学》2010年第6期449-457,共9页Journal of Applied Acoustics

基　　金：水下测控技术国防科技重点实验室基金(YSOC260601)资助课题;哈尔滨工程大学基础研究基金(HEUFT07018)

摘　　要：提出了多途信道中的声屏蔽技术,并应用于抗拖船干扰,以克服传统的阵处理办法抑制拖船干扰时所存在的探测盲区问题。把拖曳线列阵接收的拖船干扰和同方位的目标信号在频域通过一个屏蔽聚焦权滤波器,在对干扰屏蔽的同时,对目标聚焦。针对聚焦权实用性差的缺点,又提出了屏蔽非聚焦权,并与常规波束形成做了比较。11元水平阵数据仿真结果表明,该技术提高了处理增益约5 dB;在抑制拖船干扰提高处理增益的同时,理论上也可以消除掉在该方向上强目标干扰形成的探测盲区。An acoustic covering technology in multi-path channel is proposed and applied to tow-vessel noise suppressing for the sake of eliminating the detection blind zone,which is impossible in the traditional technology of hydrophone array processing.The signals received by every element,contain the noise of tow-vessel,and the signals transmitted by the target in the same bearing,are weighted in the frequency domain according to their different channels. In this way,the focusing on the target and the covering to the noise of tow-vessel can be achieved simultaneously.Further more,a non-focusing covering weighting is proposed to overcome the application difficulty of focusing covering weighting,and compared with the conventional beam-forming.The simulation results indicate that,noise of tow-vessel can be suppressed and theoretically the detection blind zone can be eliminated at the same time.

关 键 词：屏蔽技术 拖船 干扰屏蔽 聚焦 处理增益 目标信号 常规波束形成 拖曳线列阵 抑制 探测 盲区问题 仿真结果 多途信道 处理办法 水平阵 滤波器 数据 频域 理论 接收 

分 类 号：O429[理学—声学]