基于时间反转处理的空—时逆滤波聚焦研究  

Research on Spatio-Temporal Inverse Filter Focusing Based on Time Reversal Processing

作　　者：潘翔[1] 李超[1] 

机构地区：[1]浙江大学信息与电子工程系,杭州310027

出　　处：《传感技术学报》2006年第6期2603-2606,共4页Chinese Journal of Sensors and Actuators

基　　金：海洋"973"资助项目(5132103ZZT21B);海洋重点实验室基金资助(51446050105JW0401;51446060105JW0403)

摘　　要：由于传播介质损耗的存在,在复杂的浅海波导中应用时间反转处理对目标进行检测和定位效果不佳.在分析空—时逆滤波和时反处理关系的基础上,提出了一种迭代时反的方法.将源信号与时反发射后再接收的信号作差值,将差值作为信号进行时间反转后再发射,用这次接收的信号修正前一次时反发射后接收的信号,不断重复这个过程直至恢复源信号.实验结果表明将迭代时反处理用于逆声源问题在有损耗介质中可以实现空—时逆滤波聚焦的效果.When time reversal is used to detect and localize the underwater object, dissipation in the medium degrades the quality. The relation between spatio-temporal inverse filter and time reversal is analyzed, and the iterative time reversal is presented. The difference between the focusing pattern and the desired spatiotemporal objective is then computed. This difference is time reversed and transmitted. The received signal can be considered as a correction signal to improve the focusing pattern. This process can be repeated iteratively up to the attainment of the optimal focusing. Experimental data demonstrates the feasibility of this iterative technique.

关 键 词：迭代时反处理 逆滤波 聚焦 声纳 

分 类 号：TB566[交通运输工程—水声工程]