鲁棒性的水下高精度时延估计算法  

A high-precise time delay estimation algorithm with robustness for underwater acoustic channel

作　　者：李记龙[1] 王雪琰 翟玉爽 黄敏燕[1] 冯海泓[1] LI Jilong;WANG Xueyan;ZHAI Yushuang;HUANG Minyan;FENG Haihong(Shanghai Acoustics Laboratory,Chinese Academy of Sciences,Shanghai 201815,China;University of Chinese Academy of Sciences,Beijing 100032,China)

机构地区：[1]中国科学院声学研究所东海研究站,上海201815 [2]中国科学院大学,北京100032

出　　处：《导航定位学报》2020年第3期58-64,共7页Journal of Navigation and Positioning

基　　金：国家重点研发计划项目(2016YPB0501703);国家自然科学基金重点项目(61531018)。

摘　　要：为进一步提高水下目标定位和导航的精度,提出1种适用于时变多途衰落信道的高精度时延估计算法,包括2种核心算法:高精度时延估计算法,以广义互相关算法为基础,对相关峰包络做样条插值,在降低计算量的同时,实现时延的高精度估计;鲁棒性相关包络检测算法,在相关峰包络比特征参数的基础上,引入短时能量比和子带能量比2个特征参数,在保证相同检测概率的前提下,大大降低虚警概率。实验结果证明,该算法的计算量小、性能可靠、测时精度较高。In order to further improve the accuracy of underwater target positioning and navigation,the paper proposed a time delay estimation algorithm with high precision and robustness for time-varying and multipath fading channels,which includes two key methods:based on generalized cross correlation algorithm,the spline interpolation was performed for the correlation peak envelope by the high-precise time delay estimate,to realize the high-precise estimation while reduce the computation;based on the features of correlation peak envelope ratio,the short-term energy ratio and sub-band energy ratio were introduced by the robust correlation envelope detection,to greatly reduce the false alarm probability while keep the same detection probability.Experimental result showed that the proposed algorithm would have small calculation,reliable performance and high accuracy of time measuring.

关 键 词：水声定位 时延估计 短时能量比 子带能量比 

分 类 号：P228[天文地球—大地测量学与测量工程]