Robust TDOA/FDOA estimation from emitter signals for hybrid localization using UAVs  

作　　者：Yu-bing Wang Xiao-long Liang Jia-qiang Zhang Bao-xiang Ren Ke Jin 

机构地区：[1]Air Trmffic Control and Navigation College,Air Force Engineering University,Xi'an,China [2]Shaanxi Key Labomtory of Meta-synthesis for Electronic&Information System,Xi'an,China [3]National Digital Switching System Engineering and Technological Research Center,Zhengzhou,China

出　　处：《Defence Technology（防务技术）》2022年第1期81-93,共13页Defence Technology

基　　金：The authors would like to acknowledge National Natural Science Foundation of China(Grant No.xxxxxx)。

摘　　要：This paper considers the time difference of arrival(TDOA)and frequency difference of arrival(FDOA)estimation problem for joint localization using unmanned aerial vehicles(UAVs),involving range migration(RM)and Doppler ambiguity within observation interval.A robust estimation method based on interpolation and resampling is proposed.Specifically,the interpolation artificially increases the pulse repetition frequency(PRF).After that,the resampling eliminates the coupling between range frequency and slow time.Finally,a coherent integration step based on inverse discrete Fourier transform(IDFT)is used to achieve parameter estimation and suppress the grating lobes caused by interpolation.The proposed method could be efficiently implemented by fast Fourier transform(FFT),inverse FFT(IFFT)and non-uniform FFT(NUFFT)without parameter searching procedures.Numerical experiments indicate that the proposed method has nearly optimal anti-noise performance but much lower computational complexity than the maximum likelihood estimator,which makes it more competitive in practical applications.

关 键 词：TDOA FDOA Parameter estimation Doppler ambiguity Hybrid localization 

分 类 号：V279[航空宇航科学与技术—飞行器设计] V249.1