文章摘要
杨伏洲,王海燕,申晓红,陈钊.水声多径单阵元主动时间反转检测性能研究[J].声学技术,2011,(4):359~363
水声多径单阵元主动时间反转检测性能研究
Active time reversal detection performance of a single transducer in acoustic multipath channel
投稿时间:2009-12-15  修订日期:2010-03-27
DOI:
中文关键词: 多径信道  时间反转  单阵元  收发合置  主动探测
英文关键词: ultipath  time reversal(TR)  single transducer  monostatic  active detection
基金项目:
作者单位E-mail
杨伏洲 西北工业大学航海学院, 西安 710072 zhuhong0825@tom.com 
王海燕 西北工业大学航海学院, 西安 710072  
申晓红 西北工业大学航海学院, 西安 710072  
陈钊 西北工业大学航海学院, 西安 710072  
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中文摘要:
      利用时间反转(Time Reversal,TR)良好的环境宽容性以及能量聚焦性,单阵元收发合置换能器通过主动时反信号对低信噪比下目标进行检测,以经典射线理论建立海洋中声多径信道传播模型,基于理论推导了单阵元主动TR信号目标检测的可行性。从理论上对单阵元收发合置换能器主动TR的处理增益进行详细分析,推导出单阵元主动TR的处理增益的提高与多径信道数目近似成正比的关系,为低信噪比下微弱信号的主动方式检测提供了可靠的理论依据。最后仿真以海洋声传播多径信道为背景,通过研究单频矩阵脉冲(CW)信号主动TR下单阵元收发合置换能器在微弱信号下检测目标的实验,成功验证了理论。
英文摘要:
      Due to favorable tolerance of environment and focusing of energy in time reversal,a single monostatic trans-ducer with active time reversal signal can be used to detect targets of low signal to noise ratio.With the acoustic multi-path model based on classic ray theory,the feasibility of active TR signal detection is conducted theoretically.Through the detailed analysis of the active TR processing gain of a single monostatic transducer,the approximately proportional relationship between processing gain and the number of multipath is developed,which provides a theoretic basis for weak signal detection.In the condition of acoustic multipath propagation,the theory proposed in this paper is verified by the simulation of the active TR target detection with CW signal.
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