一种新的利用时差相关性的时差分选配对方法  

New method for TDOA sorting and pairing using TDOAs' correlation

作　　者：任文娟[1,2] 胡东辉[1,2] 丁赤飚[1,2] 

机构地区：[1]中国科学院空间信息处理与应用系统技术重点实验室,北京100190 [2]中国科学院电子学研究所,北京100190

出　　处：《西安电子科技大学学报》2011年第6期89-96,共8页Journal of Xidian University

摘　　要：在时差无源定位系统中,为了消除3种常见的高重频信号的定位模糊,提出了一种新的时差分选配对方法.新方法定义了相关系数来表征两个配对时差的相关程度,通过计算相关系数把属于同一个辐射源的两个时差序列分选出来,即同时完成了时差序列的分选和配对;然后,对单一辐射源的配对时差序列的相关矩阵进行分析,并依据高重频信号的配对表现剔除虚假时差对.仿真结果表明新方法能够大大减少虚假时差对的数量,从而抑制了虚假目标的产生,有效改善了定位模糊问题.For eliminating location ambiguity of three familiar types of high PRF（pulse repetition frequency） signal in the TDOA（time difference of arrival） passive location system,a new method for TDOA sorting and pairing is put forward.The new method defines the correlation coefficient which describes the correlation between a pair of TDOAs.Firstly,two TDOA sequences of a certain target are sorted by calculating the correlation coefficient,so TDOA sequences＇ sorting and pairing is accomplished simultaneously,and then the correlation coefficient matrix of single target＇s pairing TDOA sequences is analyzed,and false pairs of TDOAs are eliminated according to the pairing representation of the high PRF signal.Simulation results show that the new method is able to reduce the number of false pairs of TDOAs,so it can reduce false locations and improve location ambiguity effectively.

关 键 词：定位 模糊 高重频 时差 分选 配对 相关性 

分 类 号：TN971[电子电信—信号与信息处理]