三星干扰源定位中ETDE时差算法的研究  

Research on the ETDE Algorithm of Three Stars Interference Sources Positioning

作　　者：牟庆丰 顾平[1] 张荣芬[1] MU Qingfeng GU Ping ZHANG Rongfen(College of Big Data and Information Engineering, Guizhou University, Guiyang 550025, Chin)

机构地区：[1]贵州大学大数据与信息工程学院,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2016年第4期57-63,共7页Journal of Guizhou University:Natural Sciences

基　　金：贵州大学引进人才科研项目资助(贵大人基合字(2014)30号);贵州省科技厅贵州大学联合资金项目资助(黔科合LH字[2014]7612)

摘　　要：在三星系统干扰源定位的时差(TDOA)估计中,ETDE约束算法不仅在不相关噪声情况下可以很好的估计时差值,在相关噪声情况也可以很好的估计时差值,但其存在着明显的缺点即只有在滤波器阶数趋于无穷或很大的情况下才能估计出时差值,而且在两路信号信噪比差变大的情况下,该算法对时差的估计效果也会下降。针对以上缺点本文提出改进的ETDE算法——ETDGE算法,该算法不仅可以在较小的滤波器阶数下对时差进行准确估计,在两路信噪比大幅度变化的情况也能达到准确估计时差的目的。In three stars system interference sources positioning,the time values of the time difference of arrival（ TDOA） can be estimated effectively based on ETDE constraint algorithm under relevant noise or non-relevant noise,but it works only in the filter when the order toward infinity or a large value and when the signal-to-noise ratio（ SNR） difference in two way signals gets bigger. In view of above shortcomings in TDOA,the improved ETDE algorithm-ETDGE algorithm was studied,which can accurately estimate the time difference not only in smaller filter order but also in the case with bigger SNR change of two way signals.

关 键 词：三星干扰源定位 TDOA ETDE算法 ETDGE算法 

分 类 号：TN97[电子电信—信号与信息处理]