This paper focuses on the trusted vessel position acquisition using passive localization based on the booming low-earth-orbit (LEO) satellites.As the high signal-to-noise ratio (SNR) reception can-not always be guaranteed at LEO satellites,the re-cently developed direct position determination (DPD)is adopted.For LEO satellite-based passive localiza-tion systems,an efficient DPD is challenging due to the excessive exhaustive search range leading from broad satellite coverage.In order to reduce the com-putational complexity,we propose a time difference of arrival-assisted DPD (TA-DPD) which minimizes the searching area by the time difference of arrival mea-surements and their variances.In this way,the size of the searching area is determined by both geomet-rical constraints and qualities of received signals,and signals with higher SNRs can be positioned more ef-ficiently as their searching areas are generally smaller.Both two-dimensional and three-dimensional passive localization simulations using the proposed TA-DPD are provided to demonstrate its efficiency and valid-ity.The superior accuracy performance of the pro-posed method,especially at low SNRs conditions,is also verified through the comparison to conventional two-step methods.Providing a larger margin in link budget for satellite-based vessel location acquisition,the TA-DPD can be a competitive candidate for trusted marine location service.

Shijie Li;Qianyun Zhang;Boyu Deng;Biyi Wu;Yue Gao

School of Cyber Science and Technology,BeiHang University,Beijing 100191,China;Tsinghua University,China,Beijing 100084,China;Beijing Institute of Technology,Beijing 100081,China;School of Computer Science Fudan University,Shanghai 200433,China

中国通信（英文版）

[1]Shijie Li;Qianyun Zhang;Boyu Deng;Biyi Wu;Yue Gao-.A Fast and Accurate LEO Satellite-Based Direct Position Determination Assisted by TDOA Measurements)[J].中国通信（英文版）,2022(01):92-103

ficiently

Fast,Accurate,LEO,Satellite,Based,Direct,Position,Determination,Assisted,by,TDOA,Measurements,This,paper,focuses,trusted,vessel,acquisition,using,passive,localization,booming,low,earth,orbit,satellites,noise,ratio,reception,not,always,be,guaranteed,cently,developed,direct,determination,DPD,adopted,For,systems,efficient,challenging,due,excessive,exhaustive,range,leading,from,broad,coverage,In,order,reduce,putational,complexity,we,difference,arrival,assisted,TA,which,minimizes,searching,mea,their,variances,this,size,determined,both,geomet,rical,constraints,qualities,received,signals,higher,SNRs,positioned,more,areas,generally,smaller,Both,two,dimensional,three,simulations,proposed,provided,demonstrate,its,efficiency,valid,superior,accuracy,performance,especially,conditions,also,verified,through,comparison,conventional,step,methods,Providing,larger,margin,link,budget,location,competitive,candidate,marine,service

0.573882