Focusing with the decomposition of the time reversal operator method in noisy environments

作     者：Chun-xiao LI Jian-long LI Xian-yi GONG Ming-fei GUO 

作者机构：Department of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China Hangzhou Applied Acoustics Research Hangzhou 310012 China MOE Key Laboratory of Mechanical Manufacture and Automation Zhejiang University of Technology Hangzhou 310014 China 

出 版 物：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 (浙江大学学报（英文版）A辑（应用物理与工程）)

年 卷 期：2009年第10卷第7期

页      面：997-1008页

核心收录：

学科分类：0711[理学-系统科学] 07[理学] 070104[理学-应用数学] 0701[理学-数学] 

基　　金：Project supported by the National Natural Science Foundation of China (Nos. 60702022 and 60772094) the National Basic Re-search Program (973) of China (No. 5132103ZZT21B) 

主　　题：Decomposition of the time reversal operator (DORT) Time reversal mirror Retrofocusing performance 

摘      要：This paper presents a detailed analysis of the effects of noise (reverberation) on the focusing performance of de-composition of the time reversal operator (DORT) in a noise-limited case and in a reverberation-limited case, respectively. Quantitative results obtained from simulations and experiments are presented. The results show the DORT method can be effi-ciently applied to target detection with enough source level to yield significant backscatter. For a target placed on the bottom, the influence of the reverberation on the focusing performance is slight. However, distinguishing between a target and constant backscattering returning from strong local clutter on the bottom (false alarms) needs further research.