DOA Imaging Algorithm based on Time-Reversal Theory

摘要：

Time reversal method can be successfully used to locate the unknown targets in deterministic and uniform media. However, it is not appropriate for effective dealing with stochastic effects arising from inhomogeneities in a random medium that cause multipathing. In order to improve imaging effects in random media, an active-transducer array imaging approach motivated by time reversal mirrors is proposed. DOA imaging algorithm is based on the following steps:(1)an arrival time analysis of the echo received from the scatters, (2)the singular value decomposition of the array response matrix in the frequency domain. In comparison with traditional approach, this time-resolved imaging method compresses multipathing and realizes self-adaptive focusing. We illustrate the theory with the results of numeric simulations. The approach gives an effective estimate of the cross-range of the targets and has higher detection performance and statistical stability

关键词： time reversal mirrors random medium singular value decomposition DO A estimation

作者: Yongqing FU Yunlong XIA

作者单位: Harbin Engineering University, China

会议类型: 国际会议

会议名称: 2nd IEEE Conference on Industrial Electronics and Applications(ICIEA 2007)(第二届IEEE工业电子与应用国际会议)

会议地点: 哈尔滨

会议语种:英文

在线出版日期: 2007-05-23（万方平台首次上网日期，不代表论文的发表时间）