基于时反处理的主动声自导鱼雷定位方法

传统的定位方法只能进行距离的估计,不能给出目标的深度信息,而时间反转处理基于声场的空间互易性,充分利用信道的多途特性.使能量在声源点得到聚焦,不仅能得到目标的距离,还能得到目标的深度.对于定位主动声自导鱼雷,可以利用其发射的脉冲信号,通过信道建模进行时间反转处理,使之匹配于真实信道,从而得到目标的距离和深度.实验仿真结果表明,此方法可以对主动声自导鱼雷进行距离和深度上的准确定位,而利用水平阵的阵长和阵元数目的优势,还能提高对弱信号的检测.这对潜艇水下防御有着重要的意义.

Passive Localization of Active Homing Torpedo Based on Time-reversal Processing

Conventional localization only obtains range of the target,but time reversal processing based on the reciprocity of sound field makes the best use of the characteristic of multi-path channel,retransmits the reversed signal back to refocus on the sound source,and achieves the range of target and the depth of target.For active homing torpedo,the position of torpedo can be gained by using the received pulse of torpedo.Theoretical analysis and simulation show that using the pulse signal,time reversal processing...