A Linear-Correction Method for TDOA and FDOA-Based Moving Source Localization

Bing DENG  Zhengbo SUN  Le YANG  Dexiu HU  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E100-A   No.4   pp.1066-1069
Publication Date: 2017/04/01
Online ISSN: 1745-1337
DOI: 10.1587/transfun.E100.A.1066
Type of Manuscript: LETTER
Category: Digital Signal Processing
time difference of arrival,  frequency difference of arrival,  weighted least-squares,  passive localization,  

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A linear-correction method is developed for source position and velocity estimation using time difference of arrival (TDOA) and frequency difference of arrival (FDOA) measurements. The proposed technique first obtains an initial source location estimate using the first-step processing of an existing algebraic algorithm. It then refines the initial localization result by estimating via weighted least-squares (WLS) optimization and subtracting out its estimation error. The new solution is shown to be able to achieve the Cramer-Rao lower bound (CRLB) accuracy and it has better accuracy over several benchmark methods at relatively high noise levels.