CAJ | 학술논문

克服水下多途干扰,在噪声背景中实现多目标被动定位是声纳信号处理的主要功能之一.本文提出了利用矢量阵的迭代时间反转镜被动选择聚焦方法.利用虚拟迭代时间反转镜(DITRM)可综合多途信息,对信号进行时间、空间被动聚焦的同时,在信道输出总能量强的目标处实现选择性聚焦.声矢量水听器阵与DITRM结合可提高算法的处理增益.对矢量阵DITRM选择聚焦原理进行了理论分析,仿真结果表明了所提算法的正确性和工程适用性.
극복수하다도간우,재조성배경중실현다목표피동정위시성납신호처리적주요공능지일.본문제출료이용시량진적질대시간반전경피동선택취초방법.이용허의질대시간반전경(DITRM)가종합다도신식,대신호진행시간、공간피동취초적동시,재신도수출총능량강적목표처실현선택성취초.성시량수은기진여DITRM결합가제고산법적처리증익.대시량진DITRM선택취초원리진행료이론분석,방진결과표명료소제산법적정학성화공정괄용성.
Passive multi-targets detecting in multipath and environmental noise conditions is one of the main functions for sonar signal processing. Passive iterative time-reversal mirror (TRM) technique was studied and dummy iterative time-reversal mirror (DITRM) was presented. The outputs of acoustic vector sensor array DITRM can refocus the incident acoustic field back on the origin of a probe signal regardless of the complexity of the medium and selectively focus on the less transmission loss target. The validity of the method was verified in the simulation experiments. The simulated results show that the technology has higher performance and precision because of TRM vector array processing, and is more robust than pressure-only DITRM.