NDLI: Two-step estimator for moving-emitter geolocation using time difference of arrival/frequency-difference of arrival measurements

Content Provider	IET Digital Library
Author	Kim, Yong Hee Kim, Dong Gyu Kim, Hyoung Nam
Abstract	This study presents a two-step least-squares approach for estimating the position and velocity of a moving emitter using time difference of arrival (TDOA) and frequency-difference of arrival (FDOA) measurements in a two-dimensional scenario. The proposed method first estimates the emitter position based on the asymptotes of TDOA hyperbolae and then linearises the non-linear equations of FDOAs using the estimate of the emitter position obtained in the first stage. Although the proposed method has lower performance than other methods in terms of estimation accuracy, it provides a closed-form solution without geometric constraints of sensor placement and an initial guess of emitter parameters. Since many methods derive the estimates of position and velocity with iterative numerical techniques, the proposed method can be a good alternative to set the initial guess under conditions of low measurement error. Simulation results are included to validate the algorithm, and its performance is compared with the Cramer–Rao lower bound.
Starting Page	881
Ending Page	887
Page Count	7
ISSN	17518784
Volume Number	9
e-ISSN	17518792
Issue Number	Issue 7, Aug (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-rsn/9/7
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-rsn.2014.0440
Journal	IET Radar, Sonar & Navigation
Publisher Date	2015-03-18
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Acceleration Direction of Arrival Estimation FDO Nonlinear Equation Frequency Difference-of-arrival Measurement Interpolation And Function Approximation Iterative Method Iterative Numerical Technique Least Squares Approximation Low Measurement Error Moving Emitter Position Estimation Moving Emitter Velocity Estimation Moving-emitter Geolocation Numerical Analysis Position Measurement Rotation Measurement Sensor Placement Signal Processing And Detection Signal Processing Theory Spatial Variables Measurement TDOA Hyperbolae Time Difference-of-arrival Measurement Two-step Estimator Velocity Velocity Measurement
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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