Journal
IEEE WIRELESS COMMUNICATIONS LETTERS
Volume 7, Issue 3, Pages 352-355Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LWC.2017.2777995
Keywords
Frequency difference of arrival (FDOA); source position and velocity; time difference of arrival (TDOA); two-stage weighted least squares (TSWLS)
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In this letter, an improved version of the popular two-stage weighted least squares (WLS) algorithm is presented to determine the position and velocity of a moving source using time difference of arrival and frequency difference of arrival measurements in a wireless sensor network. A closed-form solution is obtained from the minimization of the WLS criterion in each stage. The estimator accuracy is shown analytically to attain the Cramer-Rao lower bound under the small Gaussian noise assumption. Numerical simulations are included to support and corroborate the theoretical developments.
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