【摘要】 针对信号传播过程中"多径效应"引起的问题,提出时间反转的处理方法,采用经典射线理论,利用Bellhop工具箱模拟多径信道环境,研究了基于单阵元的主动时反探测及主动迭代时反的探测性能。通过计算比较时反前和时反后接收信号的信噪比情况,说明时反方法对于信噪比提升的有效性。仿真结果表明:当发射信号距离目标6 km时,采用单阵元主动时反探测方法,可有效提高接收信号的信噪比,但进一步采用单阵元主动迭代时反方法,效果提升并不明显。更多还原

【Abstract】 Aiming at the problems caused by the multipath effect in the propagation of the signals,time reversal processing method is proposed which uses the classical ray theory and Bellhop toolbox to simulate multipath channel environment,and the detection performance of active time reversal( ATR) and iterative time reversal( ITR) based on single element is studied. Through computing and comparing SNR of received signal before and after TR,the validity of the method is verified. Simulation results show that using the method of ATR based on single element can effectively improve the SNR when the distance between probe source and target is 6 km,whereas using ITR methods can’t further enhance the effect.更多还原