Title :
Bias Compensation for Least-Squares Multi-Pulse TDOA Localization Algorithms
Author :
Dogancay, Kutluyil ; Gray, Douglas A.
Author_Institution :
School of Electrical and Information Engineering, University of South Australia Mawson Lakes SA 5095, Kutluyil.Dogancay@unisa.edu.au
Abstract :
A weighted least squares (WLS) estimator is presented for time difference of arrival (TDOA) localization of an emitter using multiple TDOA measurements collected by moving receivers. A comprehensive bias analysis for this estimate is provided. Based on the outcomes of the bias analysis, a bias compensation algorithm is developed to reduce the severe WLS estimation bias. The proposed algorithm utilizes an estimate of the instantaneous bias derived from the WLS estimate itself. The significant bias reduction capability of the proposed bias compensation algorithm is illustrated with simulation examples involving geolocation of a pulse radar by unmanned aerial vehicles (UAVs).
Keywords :
Algorithm design and analysis; Covariance matrix; Equations; Lakes; Least squares approximation; Pulse measurements; Radar applications; Time difference of arrival; Time measurement; Unmanned aerial vehicles;
Conference_Titel :
Intelligent Sensors, Sensor Networks and Information Processing Conference, 2005. Proceedings of the 2005 International Conference on
Print_ISBN :
0-7803-9399-6
DOI :
10.1109/ISSNIP.2005.1595555
