一种基于时间反转处理的浅海目标监测方法

A Target Monitoring Method in Shallow Water Based on Time Reversal Processing

为了实现浅海环境中对入侵目标实时监测和判断的目的,基于时间反转技术,提出了一种利用时间反转镜在浅海环境中产生一条警戒线的水下目标监测方法,首次从理论上分析了入侵目标强度、深度和与时反阵水平距离等因素对基于时反镜的实时监测系统探测敏感度的影响。针对典型浅海声信道,通过计算机仿真和理论数据计算结果表明,采用时间反转技术的浅海水下目标监测方法的性能优于传统浅海警戒方法,该方法适用于探测小型目标或目标散射回波强度小的物体且不受浅海复杂声道及多途效应影响,具有较强的实用性。

A method to generate a cordon based on the time reversal processing for real-time target monitoring and judgment in shallow water is proposed. The effects of target strength and depth, the horizontal distance between the target and the source received array, and other factors on the sensitivity of the monitoring system are analyzed theo- retically. Numerical simulations and theoretical calculations for typical shallow water environment demonstrate that the proposed method is better than conventional alert method in shallow water. The proposed method is suitable for detect- ing small targets and the targets with small scattering echo intensity, and is not influenced by complex shallow water acoustic channel and multi-path effects.