Title :
An Improved Algebraic Solution for TDOA Localization With Sensor Position Errors
Author :
Yang Liu ; Fucheng Guo ; Le Yang ; Wenli Jiang
Author_Institution :
Coll. of Electron. Sci. & Eng., Nat. Univ. of Defense Technol., Changsha, China
Abstract :
This letter proposes an improved version of the popular two-stage weighted least squares (TSWLS) algorithm for source localization using time difference of arrival (TDOA) measurements in the presence of sensor position errors. The new technique remains to be closed-form and approximately efficient as TSWLS. But it exhibits lower estimation bias and better robustness to increased noise over TSWLS via using a new Stage-2 processing, where the localization error of its Stage-1 is estimated and subtracted from the Stage-1 output to generate the final source position estimate. Simulations corroborate the theoretical developments.
Keywords :
least squares approximations; time-of-arrival estimation; Stage-2 processing; TDOA measurements; TSWLS algorithm; estimation bias; final source position estimate; localization error; sensor position errors; source localization; time difference of arrival measurements; two-stage weighted least squares algorithm; Approximation algorithms; Covariance matrices; Estimation; Least squares approximations; Noise measurement; Signal processing algorithms; Performance Analysis; Sensor Position Errors; Source Localization; Source localization; Time Difference of Arrival; performance analysis; sensor position errors; time difference of arrival;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2015.2486769
