Passive localization by a single moving observer using TOA only with unknown SRI:Observability analysis and algorithm  

作　　者：Min ZHANG Yuhao PEI Xi LI Fucheng GUO 

机构地区：[1]College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China

出　　处：《Chinese Journal of Aeronautics》2023年第6期318-331,共14页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.61901494).

摘　　要：Passive localization by a single moving observer using Time of Arrival(TOA)only with an unknown Signal Repetition Interval(SRI)is investigated in this paper.Observability analysis is performed first.The observability condition for uniquely determining the emitter position and SRI is derived.The conditional Cramer-Rao Lower Bound(CRLB)is also analyzed.It is found that the ambiguity of the SRI integer of the first TOA does not affect the theoretical estimation precision of the emitter position and SRI.A Reference-Fixed Differential TOA(RFDTOA)-based Iterative Maximum Likelihood Estimator(IMLE)is proposed,which only needs O(M)computational operations.Theoretical analysis and simulation results show that the Mean Square Error(MSE)of the proposed algorithm could attain the CRLB with moderate Gaussian measurement noise.

关 键 词：Cramer-Rao lower bound Maximum likelihood estimation Observability analysis Passive localization Signal Repetition Interval(SRI) Time of Arrival(TOA) 

分 类 号：TN911.7[电子电信—通信与信息系统]