Moving scanning emitter tracking by a single observer using time of interception:Observability analysis and algorithm  

作　　者：Yifei ZHANG Min ZHANG Fucheng GUO 

机构地区：[1]Information Engineering Department,Rocket Force University of Engineering [2]College of Electronic Science and Engineering,National University of Defense Technology

出　　处：《Chinese Journal of Aeronautics》2017年第3期1174-1183,共10页中国航空学报（英文版）

基　　金：co-supported by the Shanghai Aerospace Science and Technology Innovation Fund of China(No.SAST2015028);the Equipment Prophecy Fund of China(No.9140A21040115KG01001)

摘　　要：The target motion analysis（TMA） for a moving scanning emitter with known fixed scan rate by a single observer using the time of interception（TOI） measurements only is investigated in this paper.By transforming the TOI of multiple scan cycles into the direction difference of arrival（DDOA） model,the observability analysis for the TMA problem is performed.Some necessary conditions for uniquely identifying the scanning emitter trajectory are obtained.This paper also proposes a weighted instrumental variable（WIV） estimator for the scanning emitter TMA,which does not require any initial solution guess and is closed-form and computationally attractive.More importantly,simulations show that the proposed algorithm can provide estimation mean square error close to the Cramer-Rao lower bound（CRLB） at moderate noise levels with significantly lower estimation bias than the conventional pseudo-linear least square（PLS） estimator.The target motion analysis（TMA） for a moving scanning emitter with known fixed scan rate by a single observer using the time of interception（TOI） measurements only is investigated in this paper.By transforming the TOI of multiple scan cycles into the direction difference of arrival（DDOA） model,the observability analysis for the TMA problem is performed.Some necessary conditions for uniquely identifying the scanning emitter trajectory are obtained.This paper also proposes a weighted instrumental variable（WIV） estimator for the scanning emitter TMA,which does not require any initial solution guess and is closed-form and computationally attractive.More importantly,simulations show that the proposed algorithm can provide estimation mean square error close to the Cramer-Rao lower bound（CRLB） at moderate noise levels with significantly lower estimation bias than the conventional pseudo-linear least square（PLS） estimator.

关 键 词：Cramer-Rao lower bound Least squares Observability Scanning emitter Target motion analysis Time of interception 

分 类 号：TP242[自动化与计算机技术—检测技术与自动化装置]