基于虚拟时间反转镜的短基线定位研究

海洋的多途效应是影响水声定位信号检测性能的主要因素。为了满足信号检测中的某种"最佳"准则,克服海洋水声信道的多途效应,本文基于信道的匹配滤波器-时间反转镜技术,提出虚拟时间反转结合匹配滤波器构造信号处理接收机的方法。通过计算机仿真和实验数据处理表明,经过基于虚拟时间反转处理的匹配滤波(TR-MF)接收机性能优于传统的匹配滤波(MF)接收机,并且将该技术应用在短基线水声定位系统中,提高了时延估计分辨力,改善了定位精度。

Short baseline positioning based on virtual time reversal mirror

The multi-path channels effects are the main factors that affect the performance of underwater acoustic signal receiver. In order to satisfy some kinds of criteria and to overcome the multi-path effects, the algorithm of the virtual time reversal mirror (VTRM) was proposed and applied to the underwater acoustic positioning based on the channel matched filter. The results of numerical simulations show that the receiver performance based on virtual time reversal mirror with matched filter processing (TR-MF) has performed better than the traditional matched filter (MF) receiver. The results of lake experiment show the application of VTRM improves the performance of underwater acoustic positioning accuracy for the short baseline positioning systems.