摘要
揭示了时间反转技术的本质,指出时反不仅是一个物理过程,更是一种信号处理方法,进而提出"时反波束形成"的概念。针对时反空时聚焦特性受到环境不确实性限制的问题,研究了用模型探查源(MS)代替实探查源(PS)的发射时反波束形成实现发射聚焦,以及用对角线加载的宽容性MVDR接收时反波束形成实现接收聚焦,并最后用于目标检测。水池实验的结果表明了该发射聚焦和接收聚焦在不确实环境下用于目标检测及其距离估计的有效性。
The essence of the time reversal （TR） technique is investigated.TR is not only a physical process, but also a signal processing method. Thereby the concept time-reversal beamforming （TRBF） is come up with. To overcome the limitation of TR spatio-temporal focusing capability imposed by environmental uncertainty, transmitting TRBF with model instead of physical probe source is studied and robust minimum-variance receiving TRBF with diagonal loading is developed, and both of them are further applied to target detection. Tank experiment results show the availability of the methods in uncertain environment, where detection and distance estimation of the target are accomplished.
出处
《声学学报》
EI
CSCD
北大核心
2008年第6期534-541,共8页
Acta Acustica
基金
2007年浙江省科技厅院士基金资助项目
