摘要
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(D ITRM)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D ITRM结合可提高算法的处理增益。对矢量阵D ITRM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。
Passive multi-targets detecting in multipath and environmental noise conditions is one of the main functions for sonar signal processing. Passive selective focusing and locating method based on acous- tic vector sensor array＇s 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.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2010年第3期322-326,共5页
Acta Armamentarii
基金
水声技术国防科技重点实验室基金资助(9140C200305080C20)
关键词
声学
虚拟迭代
时间反转镜
声矢量传感器阵
acoustic
dummy iterative
time-reversal mirror
acoustic vector sensors array
