| 马敬广,殷敬伟,惠俊英,姚直象.虚拟时反镜在水声被动测距中的应用[J].,2007,26(3):135-142 |
| 虚拟时反镜在水声被动测距中的应用 |
| Application of virtual time reversal mirror in underwater passive ranging |
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| 中文摘要: |
| 水声信道多途干涉使被动测距产生偏差,接收信号的自相关输出波形含有信道冲激响应结构的信息,本文提出通过简化模型可估计出信道冲激响应,并将其时间反转构造一前置预处理器,可实现虚拟时间反转镜(VTRM),虚拟时反镜可获得时间、空间上的自适应聚焦效果,克服多途干涉对被动测距的影响,并且实现简单,可实时对目标进行测距,通过计算机仿真研究,验证VTRM技术可匹配声信道,提高被动测距的精度． |
| 英文摘要: |
| The multipath channel causes distortion for passive ranging. The structure information of acoustic channel is contained in the auto-correlation of the received signal, and is estimated by a simplified model. The estimated channel is time reversed as a pre- processor which realizes the Virtual Time Reversal Mirror (VTRM). The VTRM can match the acoustic channel automatically and leads to an adaptive spatial focusing and a temporal compression as the conventional TRM, so it is used to mitigate the multi- path interference on passive ranging. The results of computer simulations show that the Virtual Time Reversal Mirror can adaptively match the acoustic channel, and effectively improve the precision of the passive ranging. |
| DOI：10.11684/j.issn.1000-310X.2007.03.002 |
| 中文关键词: 多途信道 被动测距 时延估计 虚拟时间反转镜 |
| 英文关键词: Multipath channel Passive ranging Estimation of time-delay Virtual time reversal mirror |
| 基金项目: |
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