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结合主动时间反转算法的短基线定位研究
引用本文:李壮, 乔钢, 何超, 赵海洋. 结合主动时间反转算法的短基线定位研究[J]. 声学学报, 2013, 38(3): 287-293. DOI: 10.15949/j.cnki.0371-0025.2013.03.006
作者姓名:李壮  乔钢  何超  赵海洋
作者单位:1.哈尔滨工程大学水声技术国家级重点实验室 哈尔滨 150001
基金项目:国防基础科研(B2420710007);国家863计划(2009AA093601-2)资助项目
摘    要:短基线声学定位技术是水下运动目标定位的重要研究内容。为了解决定位系统工作于浅水或近岸时多途扩展严重造成的时延估计误差和系统工作不稳定的问题,本文提出一种结合时间反转算法的短基线宽带应答定位技术,该方法利用短基线阵元发射宽带信号,通过应答器接收该信号时间反转处理后再返回给短基线阵元位置,实现信道多途的自适应聚焦,进而提高时延估计精度及信号检测的鲁棒性。仿真研究和湖上试验表明,该方法能够充分利用信道多途信息实现聚焦,减少信道多途对定位信号时延估计的影响,具有较强的抗噪声和多途干扰的能力。相对传统定位方法,该方法可以抑制短基线定位过程中误差及野点的产生,改善了物体定位导航的精度。

关 键 词:时间反转  短基线  应答器  多途信道  时延估计  算法  定位研究  水声定位系统  自适应聚焦  信号检测
收稿时间:2011-12-11
修稿时间:2012-04-17

The research of short baseline positioning integration of time-reversal mirror
LI Zhuang, QIAO Gang, HE Chao, ZHAO Haiyang. The research of short baseline positioning integration of time-reversal mirror[J]. ACTA ACUSTICA, 2013, 38(3): 287-293. DOI: 10.15949/j.cnki.0371-0025.2013.03.006
Authors:LI Zhuang  QIAO Gang  HE Chao  ZHAO Haiyang
Affiliation:1.National Laboratory of Underwater Acoustic Technology, Harbin Engineering University Harbin 150001
Abstract:The short baseline acoustic positioning technology is an important research of underwater moving target positioning.Considering the system usually worked in shallow water or in shore,in order to solve delay estimation error and system instability problem resulted in the multi-path channel,a SBL wideband method combining with timereversal technology is proposed in this paper,the method used short baseline element transmit the wideband signal to the transponder,which returned the signal to the SBL element location after time-reversal processing,the influence of multipath channel on response signal is reduced by using the adaptive focus on the channel multipath characteristic of the time reversal.Simulation and lake experiment indicate that the technology reduces the influence of multipath on the short baseline response signal time delay estimation and restrains the errors and outliers points in the navigation comparing with traditional position method,and finally the precision of underwater vehicle positioning and navigation is improved. 
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